Sulfate Mineral

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  • lussierite a new sodium uranyl Sulfate Mineral with bidentate uo7 so4 linkage from the blue lizard mine san juan county utah usa
    Mineralogical Magazine, 2019
    Co-Authors: Anthony R Kampf, Jakub Plasil, Travis A Olds, Barbara P Nash, Joe Marty
    Abstract:

    The new Mineral lussierite (IMA2018-101), Na 10 [(UO 2 )(SO 4 ) 4 ](SO 4 ) 2 (H 2 O) 3 , was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as pale green–yellow prisms or blades in a secondary assemblage with belakovskiite, ferrinatrite, halite, ivsite, metavoltine and thenardite. The streak is white and the fluorescence is bright cyan under 365 nm ultraviolet light. Crystals are transparent with vitreous lustre. The tenacity is brittle, the Mohs hardness is 2½, the fracture is irregular and no cleavage was observed. The Mineral is easily soluble in H 2 O and has a measured density of 2.87(2) g cm –3 . Lussierite is optically biaxial (+), with α = 1.493(1), β = 1.505(1) and γ = 1.518(1) (white light); 2V meas. = 88(1)°; dispersion is r > v , moderate; pleochroism: X = colourless, Y and Z = green yellow ( X Y ≈ Z ); optical orientation: X = b , Z ∧ a = 44° in obtuse β. Electron microprobe analyses (wavelength-dispersive spectroscopy mode) provided Na 10 (U 0.99 O 2 )(S 1.00 O 4 ) 6 ·3H 2 O (+0.06 H for charge balance). The five strongest X-ray powder diffraction lines are [ d obs A( I )( hkl )]: 6.69(95)( $\bar{1}$ 11,130), 4.814(100)(150,002,060), 3.461(83)(171, $\bar{2}$ 02), 2.955(81)(113,330) and 2.882(74)( $\bar{1}$ 91,311,191,0·10·0). Lussierite is monoclinic, Cc , a = 9.3134(4), b = 28.7501(11), c = 9.6346(7) A, β = 93.442(7)°, V = 2575.1(2) A 3 and Z = 4. The structure ( R 1 = 0.0298 for 5202 I > 2σ I ) contains a [(UO 2 )(SO 4 ) 4 ] 6– uranyl Sulfate cluster in which one SO 4 tetrahedron shares an edge (bidentate linkage) with the UO 7 pentagonal bipyramid. The uranyl Sulfate clusters occur in layers and are linked through a complex network of bonds involving Na + cations, isolated SO 4 tetrahedra and isolated H 2 O groups.

  • feynmanite a new sodium uranyl Sulfate Mineral from red canyon san juan county utah usa
    Mineralogical Magazine, 2019
    Co-Authors: Anthony R Kampf, Jakub Plasil, Joe Marty, Travis A Olds, Samuel N Perry
    Abstract:

    The new Mineral feynmanite, Na(UO 2 )(SO 4 )(OH)·3.5H 2 O, was found in both the Blue Lizard and Markey mines, San Juan County, Utah, USA, where it occurs as a secondary phase on pyrite-rich asphaltum in association with chinleite-(Y), gypsum, goethite, natrojarosite, natrozippeite, plasilite, shumwayite (Blue Lizard) and wetherillite (Markey). The Mineral is pale greenish yellow with a white streak and fluoresces bright greenish white under a 405 nm laser. Crystals are transparent with a vitreous lustre. It is brittle, with a Mohs hardness of ~2, irregular fracture and one perfect cleavage on {010}. The calculated density is 3.324 g cm –3 . Crystals are thin needles or blades, flattened on {010} and elongate on [100], exhibiting the forms {010}, {001}, {101} and {10 $\bar{1}$ }, and are up to ~0.1 mm in length. Feynmanite is optically biaxial (–), with α = 1.534(2), β = 1.561(2) and γ = 1.571(2) (white light); 2V meas. = 62(2)°; no dispersion; and optical orientation: X = b , Y ≈ a, Z ≈ c . It is weakly pleochroic: X = colourless, Y = very pale green yellow and Z = pale green yellow ( X Y Z ). Electron microprobe analyses (WDS mode) provided (Na 0.84 Fe 0.01 )(U 1.01 O 2 )(S 1.01 O 4 )(OH)·3.5H 2 O. The five strongest powder X-ray diffraction lines are [ d obs A( I )( hkl )]: 8.37(100)(010), 6.37(33)( $\bar{1}$ 01,101), 5.07(27)( $\bar{1}$ 11,111), 4.053(46)(004,021) and 3.578(34)(120). Feynmanite is monoclinic, has space group P 2/ n , a = 6.927(3), b = 8.355(4), c = 16.210(7) A, β = 90.543(4)°, V = 938.1(7) A 3 and Z = 4. The structure of feynmanite ( R 1 = 0.0371 for 1879 I o > 2σ I ) contains edge-sharing pairs of pentagonal bipyramids that are linked by sharing corners with SO 4 groups, yielding a [(UO 2 ) 2 (SO 4 ) 2 (OH) 2 ] 2– sheet based on the phosphuranylite anion topology. The sheet is topologically identical to those in deliensite, johannite and plasilite. The dehydration of feynmanite to plasilite results in interlayer collapse involving geometric reconfiguration of the sheets and the ordering of Na.

  • chinleite y nay so4 2 h2o a new rare earth Sulfate Mineral structurally related to bassanite
    Mineralogical Magazine, 2017
    Co-Authors: Anthony R Kampf, Barbara P Nash, Joe Marty
    Abstract:

    The new Mineral chinleite-(Y) (IMA2016-017), NaY(SO 4 ) 2 ·H 2 O, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. Chinleite-(Y) crystals are thin hexagonal {100} prisms (up to 0.3 mm long) with pyramidal terminations consisting of the forms {101} and {011}. Prisms are typically intergrown in divergent sprays, bow-tie aggregates or subparallel intergrowths. Crystals are colourless and transparent with a vitreous lustre. The streak is white and the Mineral is nonfluorescent. The Mohs hardness is between 2½ and 3. Crystals are brittle with at least one good cleavage parallel to [001], probably {100}, and have splintery fracture. The Mineral is slowly soluble in H 2 O at room temperature. The calculated density is 3.385 g cm –3 . The Mineral is optically uniaxial (+), with ω = 1.565(1) and e = 1.603(1) (white light). Electron microprobe analyses yielded the empirical formula (Na 0.507 Ca 0.285 Y 0.176 ) Σ0.968 (Y 0.724 Dy 0.110 Er 0.053 Gd 0.037 Ho 0.021 Yb 0.013 Nd 0.014 Eu 0.005 Sm 0.008 Ce 0.010 Pr 0.003 La 0.002 ) Σ1.000 (SO 4 ) 2 ·H 1.401 O. The eight strongest powder X-ray diffraction lines are [ d obs A( I )( hkl )]: 6.01(59)(100), 5.43(63)(011), 3.457(46)(110), 3.010(100)(200), 2.826(95)(014), 2.1365(39)(006,122), 1.8493(67)(214) and 1.6901(28)(125,034). Chinleite-(Y) is trigonal, P 3 2 21, a  = 6.890(2), c  = 12.767(2) A, V  = 524.9(3) A 3 and Z  = 3. The structure of chinleite-(Y) ( R 1  = 0.0444 for 303 F o  > 4σ F ), a three-dimensional framework, consisting of SO 4 groups, irregular NaO 8 polyhedra and YO 9 distorted tri-capped trigonal prisms, is similar to the structure of bassanite.

  • alwilkinsite y a new rare earth uranyl Sulfate Mineral from the blue lizard mine san juan county utah usa
    Mineralogical Magazine, 2017
    Co-Authors: Anthony R Kampf, Jakub Plasil, Joe Marty, Radek Skoda, Jiři Cejka, Ladislav Lapcak
    Abstract:

    The new Mineral alwilkinsite-(Y) (IMA2015-097), Y(H 2 O) 7 [(UO 2 ) 3 (SO 4 ) 2 O(OH) 3 ]·7H 2 O, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. The Mineral is slightly flexible before brittle failure with splintery fracture and perfect cleavage parallel to [010], has Mohs hardness of ∼2–2½, exhibits dull greenish-grey fluorescence and has a calculated density of 3.371 g cm –3 . Alwilkinsite-(Y) occurs as yellowish-green needles, elongate on [010], with domatic terminations and exhibits the forms {102}, {301} and {124}. It is optically biaxial (+) with α = 1.573(1), β = 1.581(1), γ = 1.601(1) (white light), the measured 2V is 65.3(1)°, the dispersion is r v (weak), the optical orientation is X  =  c , Y  =  a , Z  =  b and there is no pleochroism. Electron microprobe analyses yielded the empirical formula (Y 0.66 Dy 0.08 Gd 0.06 Er 0.05 Nd 0.03 Yb 0.03 Sm 0.02 Ce 0.01 ) Σ0.94 (H 2 O) 7 [(UO 2 ) 3 (S 1.01 O 4 ) 2 O(OH) 3 ]·7H 2 O. The eight strongest powder X-ray diffraction lines are [ d obs A( I )( hkl )]: 9.88(100)(101,002), 7.47(13)(102), 5.621(17)(103,201), 4.483(18)(104), 3.886(14)(130,222), 3.322(46)(multiple), 3.223(13)(multiple) and 3.145(16)(034). Alwilkinsite-(Y) is orthorhombic, P 2 1 2 1 2 1 , a = 11.6194(5), b  = 12.4250(6), c  = 19.4495(14) A, V  = 2807.9(3) A 3 and Z  = 4. The structure of alwilkinsite-(Y) ( R 1  = 0.042 for 4244 F o  > 4σ F ) contains edge-sharing chains of uranyl bipyramids with outlying Sulfate tetrahedra that are similar to the chain linkages within the uranyl Sulfate sheets of the zippeite structure. Short segments of the uranyl Sulfate chains in the alwilkinsite-(Y) structure have the same topology as portions of the uranyl Sulfate linkages in uranopilite. Alwilkinsite-(Y) is named for Alan (Al) J. Wilkins, MD (born 1955), the discoverer of the Mineral.

  • shumwayite uo2 so4 h2o 2 2 h2o a new uranyl Sulfate Mineral from red canyon san juan county utah usa
    Mineralogical Magazine, 2017
    Co-Authors: Anthony R Kampf, Jakub Plasil, Anatoly V Kasatkin, Joe Marty, Jiři Cejka, Ladislav Lapcak
    Abstract:

    The new Mineral shumwayite (IMA2015-058), [(UO 2 )(SO 4 )(H 2 O) 2 ] 2 ·H 2 O, was found in the Green Lizard and Giveaway-Simplot mines, White Canyon district, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. At the Green Lizard mine, it is found in association with calcite, gypsum, plasilite, pyrite, rozenite and sulfur; at the Giveaway-Simplot mine, shumwayite is associated with rhomboclase and romerite. The Mineral occurs as pale greenish-yellow monoclinic prisms, elongated on [100], up to ∼0.3 mm long and commonly in subparallel to random intergrowths. The Mineral is transparent with a vitreous lustre and has a white streak. It fluoresces bright greenish white under both longwave and shortwave ultraviolet radiation. The Mohs hardness is ∼2. Crystals are brittle with perfect {011} cleavage and irregular fracture. The Mineral is slightly deliquescent and is easily soluble in room temperature H 2 O. The calculated density is 3.844 g cm –3 . Optically, shumwayite is biaxial (+/–), with α = 1.581(1), β = 1.588(1), γ = 1.595(1) (measured in white light). The measured 2V x based on extinction data collected on a spindle stage is 89.8(8)°; the calculated 2V x is 89.6°. Dispersion is strong, but the sense is not defined because the optic sign is ambiguous. No pleochroism was observed. The optical orientation is X  =  b , Y  ≈  c , Z  ≈  a . Energy-dispersive spectrometer analyses (with H 2 O based on the crystal structure) yielded the empirical formula U 2.01 S 1.99 O 12.00 ·5H 2 O. Shumwayite is monoclinic, P 2 1 / c , a  = 6.74747(15), b  = 12.5026(3), c  = 16.9032(12) A, β = 90.919(6)°, V  = 1425.79(11) A 3 and Z  = 4. The crystal structure ( R 1  = 1.88% for 2936 F  > 4σ F ) contains UO 7 pentagonal bipyramids and SO 4 tetrahedra that link by corner-sharing to form [(UO 2 )(SO 4 )(H 2 O) 2 ] chains along [100]. The chains and isolated H 2 O groups between them are linked together only by hydrogen bonds. The Mineral is named in honour of the Shumway family, whose members account for the discovery and mining of hundreds of uranium deposits on the Colorado Plateau, including the Green Lizard mine.

Anthony R Kampf - One of the best experts on this subject based on the ideXlab platform.

  • lussierite a new sodium uranyl Sulfate Mineral with bidentate uo7 so4 linkage from the blue lizard mine san juan county utah usa
    Mineralogical Magazine, 2019
    Co-Authors: Anthony R Kampf, Jakub Plasil, Travis A Olds, Barbara P Nash, Joe Marty
    Abstract:

    The new Mineral lussierite (IMA2018-101), Na 10 [(UO 2 )(SO 4 ) 4 ](SO 4 ) 2 (H 2 O) 3 , was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as pale green–yellow prisms or blades in a secondary assemblage with belakovskiite, ferrinatrite, halite, ivsite, metavoltine and thenardite. The streak is white and the fluorescence is bright cyan under 365 nm ultraviolet light. Crystals are transparent with vitreous lustre. The tenacity is brittle, the Mohs hardness is 2½, the fracture is irregular and no cleavage was observed. The Mineral is easily soluble in H 2 O and has a measured density of 2.87(2) g cm –3 . Lussierite is optically biaxial (+), with α = 1.493(1), β = 1.505(1) and γ = 1.518(1) (white light); 2V meas. = 88(1)°; dispersion is r > v , moderate; pleochroism: X = colourless, Y and Z = green yellow ( X Y ≈ Z ); optical orientation: X = b , Z ∧ a = 44° in obtuse β. Electron microprobe analyses (wavelength-dispersive spectroscopy mode) provided Na 10 (U 0.99 O 2 )(S 1.00 O 4 ) 6 ·3H 2 O (+0.06 H for charge balance). The five strongest X-ray powder diffraction lines are [ d obs A( I )( hkl )]: 6.69(95)( $\bar{1}$ 11,130), 4.814(100)(150,002,060), 3.461(83)(171, $\bar{2}$ 02), 2.955(81)(113,330) and 2.882(74)( $\bar{1}$ 91,311,191,0·10·0). Lussierite is monoclinic, Cc , a = 9.3134(4), b = 28.7501(11), c = 9.6346(7) A, β = 93.442(7)°, V = 2575.1(2) A 3 and Z = 4. The structure ( R 1 = 0.0298 for 5202 I > 2σ I ) contains a [(UO 2 )(SO 4 ) 4 ] 6– uranyl Sulfate cluster in which one SO 4 tetrahedron shares an edge (bidentate linkage) with the UO 7 pentagonal bipyramid. The uranyl Sulfate clusters occur in layers and are linked through a complex network of bonds involving Na + cations, isolated SO 4 tetrahedra and isolated H 2 O groups.

  • feynmanite a new sodium uranyl Sulfate Mineral from red canyon san juan county utah usa
    Mineralogical Magazine, 2019
    Co-Authors: Anthony R Kampf, Jakub Plasil, Joe Marty, Travis A Olds, Samuel N Perry
    Abstract:

    The new Mineral feynmanite, Na(UO 2 )(SO 4 )(OH)·3.5H 2 O, was found in both the Blue Lizard and Markey mines, San Juan County, Utah, USA, where it occurs as a secondary phase on pyrite-rich asphaltum in association with chinleite-(Y), gypsum, goethite, natrojarosite, natrozippeite, plasilite, shumwayite (Blue Lizard) and wetherillite (Markey). The Mineral is pale greenish yellow with a white streak and fluoresces bright greenish white under a 405 nm laser. Crystals are transparent with a vitreous lustre. It is brittle, with a Mohs hardness of ~2, irregular fracture and one perfect cleavage on {010}. The calculated density is 3.324 g cm –3 . Crystals are thin needles or blades, flattened on {010} and elongate on [100], exhibiting the forms {010}, {001}, {101} and {10 $\bar{1}$ }, and are up to ~0.1 mm in length. Feynmanite is optically biaxial (–), with α = 1.534(2), β = 1.561(2) and γ = 1.571(2) (white light); 2V meas. = 62(2)°; no dispersion; and optical orientation: X = b , Y ≈ a, Z ≈ c . It is weakly pleochroic: X = colourless, Y = very pale green yellow and Z = pale green yellow ( X Y Z ). Electron microprobe analyses (WDS mode) provided (Na 0.84 Fe 0.01 )(U 1.01 O 2 )(S 1.01 O 4 )(OH)·3.5H 2 O. The five strongest powder X-ray diffraction lines are [ d obs A( I )( hkl )]: 8.37(100)(010), 6.37(33)( $\bar{1}$ 01,101), 5.07(27)( $\bar{1}$ 11,111), 4.053(46)(004,021) and 3.578(34)(120). Feynmanite is monoclinic, has space group P 2/ n , a = 6.927(3), b = 8.355(4), c = 16.210(7) A, β = 90.543(4)°, V = 938.1(7) A 3 and Z = 4. The structure of feynmanite ( R 1 = 0.0371 for 1879 I o > 2σ I ) contains edge-sharing pairs of pentagonal bipyramids that are linked by sharing corners with SO 4 groups, yielding a [(UO 2 ) 2 (SO 4 ) 2 (OH) 2 ] 2– sheet based on the phosphuranylite anion topology. The sheet is topologically identical to those in deliensite, johannite and plasilite. The dehydration of feynmanite to plasilite results in interlayer collapse involving geometric reconfiguration of the sheets and the ordering of Na.

  • chinleite y nay so4 2 h2o a new rare earth Sulfate Mineral structurally related to bassanite
    Mineralogical Magazine, 2017
    Co-Authors: Anthony R Kampf, Barbara P Nash, Joe Marty
    Abstract:

    The new Mineral chinleite-(Y) (IMA2016-017), NaY(SO 4 ) 2 ·H 2 O, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. Chinleite-(Y) crystals are thin hexagonal {100} prisms (up to 0.3 mm long) with pyramidal terminations consisting of the forms {101} and {011}. Prisms are typically intergrown in divergent sprays, bow-tie aggregates or subparallel intergrowths. Crystals are colourless and transparent with a vitreous lustre. The streak is white and the Mineral is nonfluorescent. The Mohs hardness is between 2½ and 3. Crystals are brittle with at least one good cleavage parallel to [001], probably {100}, and have splintery fracture. The Mineral is slowly soluble in H 2 O at room temperature. The calculated density is 3.385 g cm –3 . The Mineral is optically uniaxial (+), with ω = 1.565(1) and e = 1.603(1) (white light). Electron microprobe analyses yielded the empirical formula (Na 0.507 Ca 0.285 Y 0.176 ) Σ0.968 (Y 0.724 Dy 0.110 Er 0.053 Gd 0.037 Ho 0.021 Yb 0.013 Nd 0.014 Eu 0.005 Sm 0.008 Ce 0.010 Pr 0.003 La 0.002 ) Σ1.000 (SO 4 ) 2 ·H 1.401 O. The eight strongest powder X-ray diffraction lines are [ d obs A( I )( hkl )]: 6.01(59)(100), 5.43(63)(011), 3.457(46)(110), 3.010(100)(200), 2.826(95)(014), 2.1365(39)(006,122), 1.8493(67)(214) and 1.6901(28)(125,034). Chinleite-(Y) is trigonal, P 3 2 21, a  = 6.890(2), c  = 12.767(2) A, V  = 524.9(3) A 3 and Z  = 3. The structure of chinleite-(Y) ( R 1  = 0.0444 for 303 F o  > 4σ F ), a three-dimensional framework, consisting of SO 4 groups, irregular NaO 8 polyhedra and YO 9 distorted tri-capped trigonal prisms, is similar to the structure of bassanite.

  • alwilkinsite y a new rare earth uranyl Sulfate Mineral from the blue lizard mine san juan county utah usa
    Mineralogical Magazine, 2017
    Co-Authors: Anthony R Kampf, Jakub Plasil, Joe Marty, Radek Skoda, Jiři Cejka, Ladislav Lapcak
    Abstract:

    The new Mineral alwilkinsite-(Y) (IMA2015-097), Y(H 2 O) 7 [(UO 2 ) 3 (SO 4 ) 2 O(OH) 3 ]·7H 2 O, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. The Mineral is slightly flexible before brittle failure with splintery fracture and perfect cleavage parallel to [010], has Mohs hardness of ∼2–2½, exhibits dull greenish-grey fluorescence and has a calculated density of 3.371 g cm –3 . Alwilkinsite-(Y) occurs as yellowish-green needles, elongate on [010], with domatic terminations and exhibits the forms {102}, {301} and {124}. It is optically biaxial (+) with α = 1.573(1), β = 1.581(1), γ = 1.601(1) (white light), the measured 2V is 65.3(1)°, the dispersion is r v (weak), the optical orientation is X  =  c , Y  =  a , Z  =  b and there is no pleochroism. Electron microprobe analyses yielded the empirical formula (Y 0.66 Dy 0.08 Gd 0.06 Er 0.05 Nd 0.03 Yb 0.03 Sm 0.02 Ce 0.01 ) Σ0.94 (H 2 O) 7 [(UO 2 ) 3 (S 1.01 O 4 ) 2 O(OH) 3 ]·7H 2 O. The eight strongest powder X-ray diffraction lines are [ d obs A( I )( hkl )]: 9.88(100)(101,002), 7.47(13)(102), 5.621(17)(103,201), 4.483(18)(104), 3.886(14)(130,222), 3.322(46)(multiple), 3.223(13)(multiple) and 3.145(16)(034). Alwilkinsite-(Y) is orthorhombic, P 2 1 2 1 2 1 , a = 11.6194(5), b  = 12.4250(6), c  = 19.4495(14) A, V  = 2807.9(3) A 3 and Z  = 4. The structure of alwilkinsite-(Y) ( R 1  = 0.042 for 4244 F o  > 4σ F ) contains edge-sharing chains of uranyl bipyramids with outlying Sulfate tetrahedra that are similar to the chain linkages within the uranyl Sulfate sheets of the zippeite structure. Short segments of the uranyl Sulfate chains in the alwilkinsite-(Y) structure have the same topology as portions of the uranyl Sulfate linkages in uranopilite. Alwilkinsite-(Y) is named for Alan (Al) J. Wilkins, MD (born 1955), the discoverer of the Mineral.

  • shumwayite uo2 so4 h2o 2 2 h2o a new uranyl Sulfate Mineral from red canyon san juan county utah usa
    Mineralogical Magazine, 2017
    Co-Authors: Anthony R Kampf, Jakub Plasil, Anatoly V Kasatkin, Joe Marty, Jiři Cejka, Ladislav Lapcak
    Abstract:

    The new Mineral shumwayite (IMA2015-058), [(UO 2 )(SO 4 )(H 2 O) 2 ] 2 ·H 2 O, was found in the Green Lizard and Giveaway-Simplot mines, White Canyon district, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. At the Green Lizard mine, it is found in association with calcite, gypsum, plasilite, pyrite, rozenite and sulfur; at the Giveaway-Simplot mine, shumwayite is associated with rhomboclase and romerite. The Mineral occurs as pale greenish-yellow monoclinic prisms, elongated on [100], up to ∼0.3 mm long and commonly in subparallel to random intergrowths. The Mineral is transparent with a vitreous lustre and has a white streak. It fluoresces bright greenish white under both longwave and shortwave ultraviolet radiation. The Mohs hardness is ∼2. Crystals are brittle with perfect {011} cleavage and irregular fracture. The Mineral is slightly deliquescent and is easily soluble in room temperature H 2 O. The calculated density is 3.844 g cm –3 . Optically, shumwayite is biaxial (+/–), with α = 1.581(1), β = 1.588(1), γ = 1.595(1) (measured in white light). The measured 2V x based on extinction data collected on a spindle stage is 89.8(8)°; the calculated 2V x is 89.6°. Dispersion is strong, but the sense is not defined because the optic sign is ambiguous. No pleochroism was observed. The optical orientation is X  =  b , Y  ≈  c , Z  ≈  a . Energy-dispersive spectrometer analyses (with H 2 O based on the crystal structure) yielded the empirical formula U 2.01 S 1.99 O 12.00 ·5H 2 O. Shumwayite is monoclinic, P 2 1 / c , a  = 6.74747(15), b  = 12.5026(3), c  = 16.9032(12) A, β = 90.919(6)°, V  = 1425.79(11) A 3 and Z  = 4. The crystal structure ( R 1  = 1.88% for 2936 F  > 4σ F ) contains UO 7 pentagonal bipyramids and SO 4 tetrahedra that link by corner-sharing to form [(UO 2 )(SO 4 )(H 2 O) 2 ] chains along [100]. The chains and isolated H 2 O groups between them are linked together only by hydrogen bonds. The Mineral is named in honour of the Shumway family, whose members account for the discovery and mining of hundreds of uranium deposits on the Colorado Plateau, including the Green Lizard mine.

Jakub Plasil - One of the best experts on this subject based on the ideXlab platform.

  • lussierite a new sodium uranyl Sulfate Mineral with bidentate uo7 so4 linkage from the blue lizard mine san juan county utah usa
    Mineralogical Magazine, 2019
    Co-Authors: Anthony R Kampf, Jakub Plasil, Travis A Olds, Barbara P Nash, Joe Marty
    Abstract:

    The new Mineral lussierite (IMA2018-101), Na 10 [(UO 2 )(SO 4 ) 4 ](SO 4 ) 2 (H 2 O) 3 , was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as pale green–yellow prisms or blades in a secondary assemblage with belakovskiite, ferrinatrite, halite, ivsite, metavoltine and thenardite. The streak is white and the fluorescence is bright cyan under 365 nm ultraviolet light. Crystals are transparent with vitreous lustre. The tenacity is brittle, the Mohs hardness is 2½, the fracture is irregular and no cleavage was observed. The Mineral is easily soluble in H 2 O and has a measured density of 2.87(2) g cm –3 . Lussierite is optically biaxial (+), with α = 1.493(1), β = 1.505(1) and γ = 1.518(1) (white light); 2V meas. = 88(1)°; dispersion is r > v , moderate; pleochroism: X = colourless, Y and Z = green yellow ( X Y ≈ Z ); optical orientation: X = b , Z ∧ a = 44° in obtuse β. Electron microprobe analyses (wavelength-dispersive spectroscopy mode) provided Na 10 (U 0.99 O 2 )(S 1.00 O 4 ) 6 ·3H 2 O (+0.06 H for charge balance). The five strongest X-ray powder diffraction lines are [ d obs A( I )( hkl )]: 6.69(95)( $\bar{1}$ 11,130), 4.814(100)(150,002,060), 3.461(83)(171, $\bar{2}$ 02), 2.955(81)(113,330) and 2.882(74)( $\bar{1}$ 91,311,191,0·10·0). Lussierite is monoclinic, Cc , a = 9.3134(4), b = 28.7501(11), c = 9.6346(7) A, β = 93.442(7)°, V = 2575.1(2) A 3 and Z = 4. The structure ( R 1 = 0.0298 for 5202 I > 2σ I ) contains a [(UO 2 )(SO 4 ) 4 ] 6– uranyl Sulfate cluster in which one SO 4 tetrahedron shares an edge (bidentate linkage) with the UO 7 pentagonal bipyramid. The uranyl Sulfate clusters occur in layers and are linked through a complex network of bonds involving Na + cations, isolated SO 4 tetrahedra and isolated H 2 O groups.

  • feynmanite a new sodium uranyl Sulfate Mineral from red canyon san juan county utah usa
    Mineralogical Magazine, 2019
    Co-Authors: Anthony R Kampf, Jakub Plasil, Joe Marty, Travis A Olds, Samuel N Perry
    Abstract:

    The new Mineral feynmanite, Na(UO 2 )(SO 4 )(OH)·3.5H 2 O, was found in both the Blue Lizard and Markey mines, San Juan County, Utah, USA, where it occurs as a secondary phase on pyrite-rich asphaltum in association with chinleite-(Y), gypsum, goethite, natrojarosite, natrozippeite, plasilite, shumwayite (Blue Lizard) and wetherillite (Markey). The Mineral is pale greenish yellow with a white streak and fluoresces bright greenish white under a 405 nm laser. Crystals are transparent with a vitreous lustre. It is brittle, with a Mohs hardness of ~2, irregular fracture and one perfect cleavage on {010}. The calculated density is 3.324 g cm –3 . Crystals are thin needles or blades, flattened on {010} and elongate on [100], exhibiting the forms {010}, {001}, {101} and {10 $\bar{1}$ }, and are up to ~0.1 mm in length. Feynmanite is optically biaxial (–), with α = 1.534(2), β = 1.561(2) and γ = 1.571(2) (white light); 2V meas. = 62(2)°; no dispersion; and optical orientation: X = b , Y ≈ a, Z ≈ c . It is weakly pleochroic: X = colourless, Y = very pale green yellow and Z = pale green yellow ( X Y Z ). Electron microprobe analyses (WDS mode) provided (Na 0.84 Fe 0.01 )(U 1.01 O 2 )(S 1.01 O 4 )(OH)·3.5H 2 O. The five strongest powder X-ray diffraction lines are [ d obs A( I )( hkl )]: 8.37(100)(010), 6.37(33)( $\bar{1}$ 01,101), 5.07(27)( $\bar{1}$ 11,111), 4.053(46)(004,021) and 3.578(34)(120). Feynmanite is monoclinic, has space group P 2/ n , a = 6.927(3), b = 8.355(4), c = 16.210(7) A, β = 90.543(4)°, V = 938.1(7) A 3 and Z = 4. The structure of feynmanite ( R 1 = 0.0371 for 1879 I o > 2σ I ) contains edge-sharing pairs of pentagonal bipyramids that are linked by sharing corners with SO 4 groups, yielding a [(UO 2 ) 2 (SO 4 ) 2 (OH) 2 ] 2– sheet based on the phosphuranylite anion topology. The sheet is topologically identical to those in deliensite, johannite and plasilite. The dehydration of feynmanite to plasilite results in interlayer collapse involving geometric reconfiguration of the sheets and the ordering of Na.

  • alwilkinsite y a new rare earth uranyl Sulfate Mineral from the blue lizard mine san juan county utah usa
    Mineralogical Magazine, 2017
    Co-Authors: Anthony R Kampf, Jakub Plasil, Joe Marty, Radek Skoda, Jiři Cejka, Ladislav Lapcak
    Abstract:

    The new Mineral alwilkinsite-(Y) (IMA2015-097), Y(H 2 O) 7 [(UO 2 ) 3 (SO 4 ) 2 O(OH) 3 ]·7H 2 O, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. The Mineral is slightly flexible before brittle failure with splintery fracture and perfect cleavage parallel to [010], has Mohs hardness of ∼2–2½, exhibits dull greenish-grey fluorescence and has a calculated density of 3.371 g cm –3 . Alwilkinsite-(Y) occurs as yellowish-green needles, elongate on [010], with domatic terminations and exhibits the forms {102}, {301} and {124}. It is optically biaxial (+) with α = 1.573(1), β = 1.581(1), γ = 1.601(1) (white light), the measured 2V is 65.3(1)°, the dispersion is r v (weak), the optical orientation is X  =  c , Y  =  a , Z  =  b and there is no pleochroism. Electron microprobe analyses yielded the empirical formula (Y 0.66 Dy 0.08 Gd 0.06 Er 0.05 Nd 0.03 Yb 0.03 Sm 0.02 Ce 0.01 ) Σ0.94 (H 2 O) 7 [(UO 2 ) 3 (S 1.01 O 4 ) 2 O(OH) 3 ]·7H 2 O. The eight strongest powder X-ray diffraction lines are [ d obs A( I )( hkl )]: 9.88(100)(101,002), 7.47(13)(102), 5.621(17)(103,201), 4.483(18)(104), 3.886(14)(130,222), 3.322(46)(multiple), 3.223(13)(multiple) and 3.145(16)(034). Alwilkinsite-(Y) is orthorhombic, P 2 1 2 1 2 1 , a = 11.6194(5), b  = 12.4250(6), c  = 19.4495(14) A, V  = 2807.9(3) A 3 and Z  = 4. The structure of alwilkinsite-(Y) ( R 1  = 0.042 for 4244 F o  > 4σ F ) contains edge-sharing chains of uranyl bipyramids with outlying Sulfate tetrahedra that are similar to the chain linkages within the uranyl Sulfate sheets of the zippeite structure. Short segments of the uranyl Sulfate chains in the alwilkinsite-(Y) structure have the same topology as portions of the uranyl Sulfate linkages in uranopilite. Alwilkinsite-(Y) is named for Alan (Al) J. Wilkins, MD (born 1955), the discoverer of the Mineral.

  • shumwayite uo2 so4 h2o 2 2 h2o a new uranyl Sulfate Mineral from red canyon san juan county utah usa
    Mineralogical Magazine, 2017
    Co-Authors: Anthony R Kampf, Jakub Plasil, Anatoly V Kasatkin, Joe Marty, Jiři Cejka, Ladislav Lapcak
    Abstract:

    The new Mineral shumwayite (IMA2015-058), [(UO 2 )(SO 4 )(H 2 O) 2 ] 2 ·H 2 O, was found in the Green Lizard and Giveaway-Simplot mines, White Canyon district, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. At the Green Lizard mine, it is found in association with calcite, gypsum, plasilite, pyrite, rozenite and sulfur; at the Giveaway-Simplot mine, shumwayite is associated with rhomboclase and romerite. The Mineral occurs as pale greenish-yellow monoclinic prisms, elongated on [100], up to ∼0.3 mm long and commonly in subparallel to random intergrowths. The Mineral is transparent with a vitreous lustre and has a white streak. It fluoresces bright greenish white under both longwave and shortwave ultraviolet radiation. The Mohs hardness is ∼2. Crystals are brittle with perfect {011} cleavage and irregular fracture. The Mineral is slightly deliquescent and is easily soluble in room temperature H 2 O. The calculated density is 3.844 g cm –3 . Optically, shumwayite is biaxial (+/–), with α = 1.581(1), β = 1.588(1), γ = 1.595(1) (measured in white light). The measured 2V x based on extinction data collected on a spindle stage is 89.8(8)°; the calculated 2V x is 89.6°. Dispersion is strong, but the sense is not defined because the optic sign is ambiguous. No pleochroism was observed. The optical orientation is X  =  b , Y  ≈  c , Z  ≈  a . Energy-dispersive spectrometer analyses (with H 2 O based on the crystal structure) yielded the empirical formula U 2.01 S 1.99 O 12.00 ·5H 2 O. Shumwayite is monoclinic, P 2 1 / c , a  = 6.74747(15), b  = 12.5026(3), c  = 16.9032(12) A, β = 90.919(6)°, V  = 1425.79(11) A 3 and Z  = 4. The crystal structure ( R 1  = 1.88% for 2936 F  > 4σ F ) contains UO 7 pentagonal bipyramids and SO 4 tetrahedra that link by corner-sharing to form [(UO 2 )(SO 4 )(H 2 O) 2 ] chains along [100]. The chains and isolated H 2 O groups between them are linked together only by hydrogen bonds. The Mineral is named in honour of the Shumway family, whose members account for the discovery and mining of hundreds of uranium deposits on the Colorado Plateau, including the Green Lizard mine.

  • svornostite k2mg uo2 so4 2 2 8h2o a new uranyl Sulfate Mineral from jachymov czech republic
    Journal of Geosciences, 2015
    Co-Authors: Jakub Plasil, Jan Hlousek, Anatoly V Kasatkin, Milan Novak, Jiri Cejka, Ladislav Lapcak
    Abstract:

    Svornostite (IMA2014-078), K2Mg[(UO2)(SO4)2]2 8H2O, is a new uranyl Sulfate Mineral from Jachymov, Western Bohemia, Czech Republic. The new Mineral was found in material originating from the Geschieber vein in the Svornost mine. It occurs as crystalline crusts composed of yellow prismatic crystals on a gangue along with geschieberite, adolfpateraite and gypsum. It is a low-temperature, supergene Mineral formed by the post-mining weathering of uraninite. Svornostite is orthorhombic; the crystal structure has been refined to R = 0.023 for 2745 unique observed reflections.

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  • alwilkinsite y a new rare earth uranyl Sulfate Mineral from the blue lizard mine san juan county utah usa
    Mineralogical Magazine, 2017
    Co-Authors: Anthony R Kampf, Jakub Plasil, Joe Marty, Radek Skoda, Jiři Cejka, Ladislav Lapcak
    Abstract:

    The new Mineral alwilkinsite-(Y) (IMA2015-097), Y(H 2 O) 7 [(UO 2 ) 3 (SO 4 ) 2 O(OH) 3 ]·7H 2 O, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. The Mineral is slightly flexible before brittle failure with splintery fracture and perfect cleavage parallel to [010], has Mohs hardness of ∼2–2½, exhibits dull greenish-grey fluorescence and has a calculated density of 3.371 g cm –3 . Alwilkinsite-(Y) occurs as yellowish-green needles, elongate on [010], with domatic terminations and exhibits the forms {102}, {301} and {124}. It is optically biaxial (+) with α = 1.573(1), β = 1.581(1), γ = 1.601(1) (white light), the measured 2V is 65.3(1)°, the dispersion is r v (weak), the optical orientation is X  =  c , Y  =  a , Z  =  b and there is no pleochroism. Electron microprobe analyses yielded the empirical formula (Y 0.66 Dy 0.08 Gd 0.06 Er 0.05 Nd 0.03 Yb 0.03 Sm 0.02 Ce 0.01 ) Σ0.94 (H 2 O) 7 [(UO 2 ) 3 (S 1.01 O 4 ) 2 O(OH) 3 ]·7H 2 O. The eight strongest powder X-ray diffraction lines are [ d obs A( I )( hkl )]: 9.88(100)(101,002), 7.47(13)(102), 5.621(17)(103,201), 4.483(18)(104), 3.886(14)(130,222), 3.322(46)(multiple), 3.223(13)(multiple) and 3.145(16)(034). Alwilkinsite-(Y) is orthorhombic, P 2 1 2 1 2 1 , a = 11.6194(5), b  = 12.4250(6), c  = 19.4495(14) A, V  = 2807.9(3) A 3 and Z  = 4. The structure of alwilkinsite-(Y) ( R 1  = 0.042 for 4244 F o  > 4σ F ) contains edge-sharing chains of uranyl bipyramids with outlying Sulfate tetrahedra that are similar to the chain linkages within the uranyl Sulfate sheets of the zippeite structure. Short segments of the uranyl Sulfate chains in the alwilkinsite-(Y) structure have the same topology as portions of the uranyl Sulfate linkages in uranopilite. Alwilkinsite-(Y) is named for Alan (Al) J. Wilkins, MD (born 1955), the discoverer of the Mineral.

  • shumwayite uo2 so4 h2o 2 2 h2o a new uranyl Sulfate Mineral from red canyon san juan county utah usa
    Mineralogical Magazine, 2017
    Co-Authors: Anthony R Kampf, Jakub Plasil, Anatoly V Kasatkin, Joe Marty, Jiři Cejka, Ladislav Lapcak
    Abstract:

    The new Mineral shumwayite (IMA2015-058), [(UO 2 )(SO 4 )(H 2 O) 2 ] 2 ·H 2 O, was found in the Green Lizard and Giveaway-Simplot mines, White Canyon district, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. At the Green Lizard mine, it is found in association with calcite, gypsum, plasilite, pyrite, rozenite and sulfur; at the Giveaway-Simplot mine, shumwayite is associated with rhomboclase and romerite. The Mineral occurs as pale greenish-yellow monoclinic prisms, elongated on [100], up to ∼0.3 mm long and commonly in subparallel to random intergrowths. The Mineral is transparent with a vitreous lustre and has a white streak. It fluoresces bright greenish white under both longwave and shortwave ultraviolet radiation. The Mohs hardness is ∼2. Crystals are brittle with perfect {011} cleavage and irregular fracture. The Mineral is slightly deliquescent and is easily soluble in room temperature H 2 O. The calculated density is 3.844 g cm –3 . Optically, shumwayite is biaxial (+/–), with α = 1.581(1), β = 1.588(1), γ = 1.595(1) (measured in white light). The measured 2V x based on extinction data collected on a spindle stage is 89.8(8)°; the calculated 2V x is 89.6°. Dispersion is strong, but the sense is not defined because the optic sign is ambiguous. No pleochroism was observed. The optical orientation is X  =  b , Y  ≈  c , Z  ≈  a . Energy-dispersive spectrometer analyses (with H 2 O based on the crystal structure) yielded the empirical formula U 2.01 S 1.99 O 12.00 ·5H 2 O. Shumwayite is monoclinic, P 2 1 / c , a  = 6.74747(15), b  = 12.5026(3), c  = 16.9032(12) A, β = 90.919(6)°, V  = 1425.79(11) A 3 and Z  = 4. The crystal structure ( R 1  = 1.88% for 2936 F  > 4σ F ) contains UO 7 pentagonal bipyramids and SO 4 tetrahedra that link by corner-sharing to form [(UO 2 )(SO 4 )(H 2 O) 2 ] chains along [100]. The chains and isolated H 2 O groups between them are linked together only by hydrogen bonds. The Mineral is named in honour of the Shumway family, whose members account for the discovery and mining of hundreds of uranium deposits on the Colorado Plateau, including the Green Lizard mine.

  • geschieberite k2 uo2 so4 2 h2o 2 a new uranyl Sulfate Mineral from jachymov
    Mineralogical Magazine, 2015
    Co-Authors: Jakub Plasil, Jan Hlousek, Anatoly V Kasatkin, Milan Novak, Radek Skoda, Jiři Cejka
    Abstract:

    The new Mineral geschieberite (IMA2014-006), K-2(UO2)(SO4)(2)(H2O)(2), was found in the Svornost mine, Jachymov, Czech Republic, where it occurs as a secondary alteration phase after uraninite in association with adolfpateraite and gypsum. Geschieberite forms crystalline aggregates of bright green colour (when thick) composed of multiply intergrown prismatic crystals elongated on [001] typically reaching 0.1-0.2 mm across; observable forms are {010} and {001}. Crystals are translucent to transparent with a vitreous lustre. The Mineral is brittle, with perfect cleavage on {100} and an uneven fracture. It has a greenish-white streak and a probable Mohs hardness of similar to 2. The Mineral is slightly soluble in cold H2O. The calculated density is 3.259 g cm(-3). The Mineral exhibits strong yellowish-green fluorescence under both shortwave and longwave UV radiation. Optically, geschieberite is biaxial (-), with beta = 1.596(2) and gamma = 1.634(4) (measured at 590 nm), with X = a. Electron-microprobe analyses provided Na2O 0.23, K2O 14.29, MgO 2.05, CaO 0.06, UO3 49.51, SO3 27.74, H2O 6.36 (structure), total 100.24 wt.%, yielding the empirical formula (K1.72Mg0.29Na0.04Ca0.01)(Sigma 2.06) (U0.98O2)(S0.98O4)(2)(H2O)(2) based on 12 O atoms per formula unit. The Raman spectrum is dominated by the symmetric stretching vibrations of UO22+, SO42- and weaker O-H stretching vibrations. Geschieberite is orthorhombic, Pna2(1), with a = 13.7778(3), b = 7.2709(4), c = 11.5488(2) angstrom, V = 1156.92(7) angstrom(3), Z = 4. The eight strongest powder X-ray diffraction lines are [d(obs) in angstrom (hkl) I-rel]: 6.882 (200) 100, 5.622 (111) 53, 4.589 (211) 12, 4.428 (202) 16, 3.681 (311) 18, 3.403 (013) 12, 3.304 (401,(1) over bar 13) 15 and 3.006 (122) 17. The structure, refined to R = 0.028 for 1882 I > 3 sigma(I) reflections, contains [(UO2)(SO4)(2)(H2O)](2-) sheets that are based on the protasite anion topology. Sheets are stacked perpendicular to a. Potassium atoms and one H2O molecule are located between these sheets, providing an interlayer linkage. The remaining H2O molecule is localized within the structural unit, at the free vertex of the uranyl pentagonal bipyramid; this vertex does not link to Sulfate tetrahedra. The Mineral is named for one of the most important ore veins in Jachymov - the Geschieber vein.

  • meisserite na5 uo2 so4 3 so3oh h2o a new uranyl Sulfate Mineral from the blue lizard mine san juan county utah usa
    Mineralogical Magazine, 2013
    Co-Authors: Jakub Plasil, Anatoly V Kasatkin, Anthony R Kampf, Joe Marty, Radek Skoda, Steve Silva, Jiři Cejka
    Abstract:

    Meisserite (IMA2013-039), Na 5 (UO 2 )(SO 4 )3(SO 3 OH)(H 2 O), is a new uranyl Sulfate Mineral from the Blue Lizard mine, San Juan County, Utah (USA). It is named in honour of the prominent Swiss Mineralogist Nicolas Meisser. The new Mineral was found in a sandstone matrix and is associated with chalcanthite, copiapite, ferrinatrite, gypsum, johannite and another new Na-bearing uranyl Sulfate, belakovskiite (IMA2013-075). Meisserite is a secondary Mineral formed by the post-mining weathering of uraninite. The Mineral is triclinic, P , a = 5.32317(10), b = 11.5105(2), c = 13.5562(10) A, α = 102.864(7)°, β = 97.414(7)°, γ = 91.461(6)°, V = 801.74(6) A 3 , and Z = 2. Crystals are prisms elongated on [100], up to 0.3 mm long, exhibiting the forms {010} and {001}. Meisserite is pale green to yellowish green, translucent to transparent and has a very pale yellow streak. It is brittle, with fair cleavage on {100} and {001}, and uneven fracture. The Mohs hardness is estimated at 2. Meisserite is somewhat hygroscopic and easily soluble in water. The calculated density based on the empirical formula is 3.208 g/cm 3 . Meisserite exhibits bright yellow green fluorescence under both long- and shortwave UV radiation. The Mineral is optically biaxial (–), with α = 1.514(1), β = 1.546(1), γ = 1.557(1) (measured in white light). The measured 2V is 60(2)° and the calculated 2V is 60°. Dispersion is r > v , perceptible, and the optical orientation is X ≈ a , Z ≈ c *. The Mineral is pleochroic, with X (colourless) Y (pale yellow) ≈ Z (pale greenish yellow). The empirical formula of meisserite (based on 19 O a.p.f.u.) is Na 5.05 (U 0.94 O 2 )(SO 4 ) 3 [SO 2.69 (OH) 1.31 ](H 2 O). The Raman spectrum is dominated by the symmetric stretching vibrations of UO 2 2+ , SO 4 2– and also weaker O–H stretching vibrations. The eight strongest powder X-ray diffraction lines are [ d obs in A (hkl)I rel ]: 13.15 (001) 81, 6.33 (0 2) 62, 5.64 (0 1,020) 52, 5.24 (100,012, 01) 100, 4.67 (101) 68, 3.849 ( 1,102,022) 48, 3.614 (03¯2, 3) 41, and 3.293 ( 13,004) 43. The crystal structure of meisserite ( R 1 = 0.018 for 3306 reflections with I obs > 3σ I ) is topologically unique among known structures of uranyl Minerals and inorganic compounds. It contains uranyl pentagonal bipyramids linked by SO 4 groups to form chains. Na + cations bond to O atoms in the chains and to an SO 3 OH group and an H 2 >O group between the chains, thereby forming a heteropolyhedral framework.

  • leydetite fe uo2 so4 2 h2o 11 a new uranyl Sulfate Mineral from mas d alary lodeve france
    Mineralogical Magazine, 2013
    Co-Authors: Jakub Plasil, Anatoly V Kasatkin, Milan Novak, Radek Skoda, Jiři Cejka, Anna Kallistova, Michal Dusek, Roman Skala, Karla Fejfarova, Nicolas Meisser
    Abstract:

    Leydetite, monoclinic Fe(UO2)(SO4)(2)(H2O)(11) (IMA 2012-065), is a new supergene uranyl Sulfate from Mas d'Alary, Lodeve, Herault, France. It forms yellow to greenish, tabular, transparent to translucent crystals up to 2 mm in size. Crystals have a vitreous lustre. Leydetite has a perfect cleavage on (001). The streak is yellowish white. Mohs hardness is similar to 2. The Mineral does not fluoresce under long- or short-wavelength UV radiation. Leydetite is colourless in transmitted light, non-pleochroic, biaxial, with alpha = 1.513(2), gamma = 1.522(2) (further optical properties could not be measured). The measured chemical composition of leydetite, FeO 9.28, MgO 0.37, Al2O3 0.26, CuO 0.14, UO3 40.19, SO3 21.91, SiO2 0.18, H2O 27.67, total 100 wt.%, leads to the empirical formula (based on 21 0 a.p.f.u.), (Fe0.93Mg0.07Al0.04Cu0.01)(Sigma 1.05)(U1.01O2)(S1.96Si0.02)(Sigma 1.98)O-8(H2O)(11). Leydetite is monoclinic, space group C2/c, with a = 11.3203(3), b = 7.7293(2), c = 21.8145(8) angstrom, beta = 102.402(3)degrees, V = 1864.18(10) angstrom(3), Z = 4, and D-calc = 2.55 g cm(-3). The six strongest reflections in the X-ray powder diffraction pattern are [d(obs) in angstrom (I) (hkl)]: 10.625 (100) (002), 6.277 (1) ((1) over bar 11), 5.321 (66) (004), 3.549 (5) (006), 2.663 (4) (008), 2.131 (2) (0 0 10). The crystal structure has been refined from single-crystal X-ray diffraction data to R-1 = 0.0224 for 5211 observed reflections with [I > 3 sigma(I)]. Leydetite possesses a sheet structure based upon the protasite anion topology. The sheet consists of UO2 bipyramids, which share four of their equatorial vertices with SO4 tetrahedra. Each SO4 tetrahedron, in turn, shares two of its vertices with UO7 bipyramids. The remaining unshared equatorial vertex of the bipyramid is occupied by H2O, which extends hydrogen bonds within the sheet to one of a free vertex of the SO4 tetrahedron. Sheets are stacked perpendicular to the c direction. In the interlayer, Fe2+ ions and H2O groups link to the sheets on either side via a network of hydrogen bonds. Leydetite is isostructural with the synthetic compound Mg(UO2)(SO4)(2)(H2O)(11). The name of the new Mineral honours Jean Claude Leydet (born 1961), an amateur Mineralogist from Brest (France), who discovered the new Mineral.

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  • shumwayite uo2 so4 h2o 2 2 h2o a new uranyl Sulfate Mineral from red canyon san juan county utah usa
    Mineralogical Magazine, 2017
    Co-Authors: Anthony R Kampf, Jakub Plasil, Anatoly V Kasatkin, Joe Marty, Jiři Cejka, Ladislav Lapcak
    Abstract:

    The new Mineral shumwayite (IMA2015-058), [(UO 2 )(SO 4 )(H 2 O) 2 ] 2 ·H 2 O, was found in the Green Lizard and Giveaway-Simplot mines, White Canyon district, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. At the Green Lizard mine, it is found in association with calcite, gypsum, plasilite, pyrite, rozenite and sulfur; at the Giveaway-Simplot mine, shumwayite is associated with rhomboclase and romerite. The Mineral occurs as pale greenish-yellow monoclinic prisms, elongated on [100], up to ∼0.3 mm long and commonly in subparallel to random intergrowths. The Mineral is transparent with a vitreous lustre and has a white streak. It fluoresces bright greenish white under both longwave and shortwave ultraviolet radiation. The Mohs hardness is ∼2. Crystals are brittle with perfect {011} cleavage and irregular fracture. The Mineral is slightly deliquescent and is easily soluble in room temperature H 2 O. The calculated density is 3.844 g cm –3 . Optically, shumwayite is biaxial (+/–), with α = 1.581(1), β = 1.588(1), γ = 1.595(1) (measured in white light). The measured 2V x based on extinction data collected on a spindle stage is 89.8(8)°; the calculated 2V x is 89.6°. Dispersion is strong, but the sense is not defined because the optic sign is ambiguous. No pleochroism was observed. The optical orientation is X  =  b , Y  ≈  c , Z  ≈  a . Energy-dispersive spectrometer analyses (with H 2 O based on the crystal structure) yielded the empirical formula U 2.01 S 1.99 O 12.00 ·5H 2 O. Shumwayite is monoclinic, P 2 1 / c , a  = 6.74747(15), b  = 12.5026(3), c  = 16.9032(12) A, β = 90.919(6)°, V  = 1425.79(11) A 3 and Z  = 4. The crystal structure ( R 1  = 1.88% for 2936 F  > 4σ F ) contains UO 7 pentagonal bipyramids and SO 4 tetrahedra that link by corner-sharing to form [(UO 2 )(SO 4 )(H 2 O) 2 ] chains along [100]. The chains and isolated H 2 O groups between them are linked together only by hydrogen bonds. The Mineral is named in honour of the Shumway family, whose members account for the discovery and mining of hundreds of uranium deposits on the Colorado Plateau, including the Green Lizard mine.

  • svornostite k2mg uo2 so4 2 2 8h2o a new uranyl Sulfate Mineral from jachymov czech republic
    Journal of Geosciences, 2015
    Co-Authors: Jakub Plasil, Jan Hlousek, Anatoly V Kasatkin, Milan Novak, Jiri Cejka, Ladislav Lapcak
    Abstract:

    Svornostite (IMA2014-078), K2Mg[(UO2)(SO4)2]2 8H2O, is a new uranyl Sulfate Mineral from Jachymov, Western Bohemia, Czech Republic. The new Mineral was found in material originating from the Geschieber vein in the Svornost mine. It occurs as crystalline crusts composed of yellow prismatic crystals on a gangue along with geschieberite, adolfpateraite and gypsum. It is a low-temperature, supergene Mineral formed by the post-mining weathering of uraninite. Svornostite is orthorhombic; the crystal structure has been refined to R = 0.023 for 2745 unique observed reflections.

  • geschieberite k2 uo2 so4 2 h2o 2 a new uranyl Sulfate Mineral from jachymov
    Mineralogical Magazine, 2015
    Co-Authors: Jakub Plasil, Jan Hlousek, Anatoly V Kasatkin, Milan Novak, Radek Skoda, Jiři Cejka
    Abstract:

    The new Mineral geschieberite (IMA2014-006), K-2(UO2)(SO4)(2)(H2O)(2), was found in the Svornost mine, Jachymov, Czech Republic, where it occurs as a secondary alteration phase after uraninite in association with adolfpateraite and gypsum. Geschieberite forms crystalline aggregates of bright green colour (when thick) composed of multiply intergrown prismatic crystals elongated on [001] typically reaching 0.1-0.2 mm across; observable forms are {010} and {001}. Crystals are translucent to transparent with a vitreous lustre. The Mineral is brittle, with perfect cleavage on {100} and an uneven fracture. It has a greenish-white streak and a probable Mohs hardness of similar to 2. The Mineral is slightly soluble in cold H2O. The calculated density is 3.259 g cm(-3). The Mineral exhibits strong yellowish-green fluorescence under both shortwave and longwave UV radiation. Optically, geschieberite is biaxial (-), with beta = 1.596(2) and gamma = 1.634(4) (measured at 590 nm), with X = a. Electron-microprobe analyses provided Na2O 0.23, K2O 14.29, MgO 2.05, CaO 0.06, UO3 49.51, SO3 27.74, H2O 6.36 (structure), total 100.24 wt.%, yielding the empirical formula (K1.72Mg0.29Na0.04Ca0.01)(Sigma 2.06) (U0.98O2)(S0.98O4)(2)(H2O)(2) based on 12 O atoms per formula unit. The Raman spectrum is dominated by the symmetric stretching vibrations of UO22+, SO42- and weaker O-H stretching vibrations. Geschieberite is orthorhombic, Pna2(1), with a = 13.7778(3), b = 7.2709(4), c = 11.5488(2) angstrom, V = 1156.92(7) angstrom(3), Z = 4. The eight strongest powder X-ray diffraction lines are [d(obs) in angstrom (hkl) I-rel]: 6.882 (200) 100, 5.622 (111) 53, 4.589 (211) 12, 4.428 (202) 16, 3.681 (311) 18, 3.403 (013) 12, 3.304 (401,(1) over bar 13) 15 and 3.006 (122) 17. The structure, refined to R = 0.028 for 1882 I > 3 sigma(I) reflections, contains [(UO2)(SO4)(2)(H2O)](2-) sheets that are based on the protasite anion topology. Sheets are stacked perpendicular to a. Potassium atoms and one H2O molecule are located between these sheets, providing an interlayer linkage. The remaining H2O molecule is localized within the structural unit, at the free vertex of the uranyl pentagonal bipyramid; this vertex does not link to Sulfate tetrahedra. The Mineral is named for one of the most important ore veins in Jachymov - the Geschieber vein.

  • plasilite na uo2 so4 oh 2h2o a new uranyl Sulfate Mineral from the blue lizard mine san juan county utah usa
    Journal of Geosciences, 2015
    Co-Authors: Anthony R Kampf, Anatoly V Kasatkin, Jiri Cejka, Joe Marty
    Abstract:

    1 Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA; akampf@nhm.org 2 V/O “Almazjuvelirexport”, Ostozhenka str., 22, block 1, 119034 Moscow, Russia 3 Department of Mineralogy and Petrology, National Museum, Cirkusova 1740, 193 00 Prague 9, Czech Republic 4 5199 E. Silver Oak Rd., Salt Lake City, UT 84108, USA * Corresponding author

  • belakovskiite na7 uo2 so4 4 so3oh h2o 3 a new uranyl Sulfate Mineral from the blue lizard mine san juan county utah usa
    Mineralogical Magazine, 2014
    Co-Authors: Anthony R Kampf, Jakub Plasil, Anatoly V Kasatkin, Joe Marty
    Abstract:

    The new Mineral belakovskiite (IMA2013-075), Na 7 (UO 2 )(SO 4 ) 4 (SO 3 OH)(H 2 O) 3 , was found in the Blue Lizard mine, Red Canyon, White Canyon district, San Juan County, Utah, USA, where it occurs as a secondary alteration phase in association with blodite, ferrinatrite, krohnkite, meisserite and metavoltine. Crystals of belakovskiite are very pale yellowish-green hair-like fibres up to 2 mm long and usually no more than a few μm in diameter. The fibres are elongated on [100] and slightly flattened on {021}. Crystals are transparent with a vitreous lustre. The Mineral has a white streak and a probable Mohs hardness of ~2. Fibres are flexible and elastic, with brittle failure and irregular fracture. No cleavage was observed. The Mineral is readily soluble in cold H 2 O. The calculated density is 2.953 g cm −3 . Optically, belakovskiite is biaxial (+) with α = 1.500(1), β = 1.511(1) and γ = 1.523(1) (measured in white light). The measured 2V is 87.1(6)° and the calculated 2V is 88°. The Mineral is non-pleochroic. The partially determined optical orientation is X ≈ a . Electron-microprobe analysis provided Na 2 O 21.67, UO 3 30.48, SO 3 40.86, H 2 O 6.45 (structure), total 99.46 wt.% yielding the empirical formula Na 6.83 (U 1.04 O 2 )(SO 4 ) 4 (S 0.99 O 3 OH)(H 2 O) 3 based on 25 O a.p.f.u. Belakovskiite is triclinic, P 1I, with a = 5.4581(3), b = 11.3288(6), c = 18.4163(13) A, α = 104.786(7)°, β = 90.092(6)°, γ = 96.767(7)°, V = 1092.76(11) A 3 and Z = 2. The eight strongest X-ray powder diffraction lines are [ d obs A( I )( hkl )]: 8.96(35)(002), 8.46(29)(011), 5.19(100)(1I01,101,1I10), 4.66(58)(013,1I02,1I1I0,110), 3.568(37)(120,023,005,03I3), 3.057(59)(01I6,11I5,1I31), 2.930(27)(multiple) and 1.8320(29)(multiple). The structure, refined to R 1 = 5.39% for 3163 F o > 4σ F reflections, contains [(UO 2 )(SO 4 ) 4 (H 2 O)] 6− polyhedral clusters connected via an extensive network of Na–O bonds and H bonds involving eight Na sites, three other H 2 O sites and an SO 3 OH (hydroSulfate) group. The 3-D framework, thus defined, is unique among known uranyl Sulfate structures. The Mineral is named for Dmitry Ilych Belakovskiy, a prominent Russian Mineralogist and Curator of the Fersman Mineralogical Museum.

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