The Experts below are selected from a list of 84 Experts worldwide ranked by ideXlab platform
Yunfei Xi - One of the best experts on this subject based on the ideXlab platform.
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Vibrational Spectroscopy of the Borate Mineral Priceite—Implications for the Molecular Structure
Spectroscopy Letters, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:ABSTRACT Priceite is a calcium borate mineral and occurs as white Crystals in the monoclinic Pyramidal Crystal system. We have used a combination of Raman spectroscopy with complimentary infrared spectroscopy and scanning electron microscopy with Energy-dispersive X-ray Spectroscopy (EDS) to study the mineral priceite. Chemical analysis shows a pure phase consisting of B and Ca only. Raman bands at 956, 974, 991, and 1019 cm−1 are assigned to the BO stretching vibration of the B10O19 units. Raman bands at 1071, 1100, 1127, 1169, and 1211 cm−1 are attributed to the BOH in-plane bending modes. The intense infrared band at 805 cm−1 is assigned to the trigonal borate stretching modes. The Raman band at 674 cm−1 together with bands at 689, 697, 736, and 602 cm−1 are assigned to the trigonal and tetrahedral borate bending modes. Raman spectroscopy in the hydroxyl stretching region shows a series of bands with intense Raman band at 3555 cm−1 with a distinct shoulder at 3568 cm−1. Other bands in this spectral reg...
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Vibrational spectroscopy of the borate mineral tunellite SrB6O9(OH)2·3(H2O) : implications for the molecular structure
Science & Engineering Faculty, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Tunellite is a strontium borate mineral with formula: SrB6O9(OH)2∙3(H2O) and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. An intense Raman band at 994 cm-1 was assigned to the BO stretching vibration of the B2O3 units. Raman bands at 1043, 1063, 1082 and 1113 cm-1 are attributed to the in-plane bending vibrations of trigonal boron. Sharp Raman bands observed at 464, 480, 523, 568 and 639 cm-1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3567 and 3614 cm-1, attributed to OH units. The molecular structure of a natural tunellite has been assessed by using vibrational spectroscopy.
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Vibrational spectroscopy of the borate mineral tunellite SrB6O9(OH)2·3(H2O) – Implications for the molecular structure
Journal of Molecular Structure, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Abstract Tunellite is a strontium borate mineral with formula: SrB6O9(OH)2·3(H2O) and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. An intense Raman band at 994 cm−1 was assigned to the BO stretching vibration of the B2O3 units. Raman bands at 1043, 1063, 1082 and 1113 cm−1 are attributed to the in-plane bending vibrations of trigonal boron. Sharp Raman bands observed at 464, 480, 523, 568 and 639 cm−1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3567 and 3614 cm−1, attributed to OH units. The molecular structure of a natural tunellite has been assessed by using vibrational spectroscopy.
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Vibrational spectroscopy of the borate mineral chambersite MnB7O13Cl--implications for the molecular structure.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2013Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Abstract Chambersite is a manganese borate mineral with formula: MnB 7 O 13 Cl and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. Raman bands at 902, 920, 942 and 963 cm −1 are assigned to the BO stretching vibration of the B 7 O 13 units. Raman bands at 1027, 1045, 1056, 1075 and 1091 cm −1 are attributed to the BCl in-plane bending modes. The intense infrared band at 866 cm −1 is assigned to the trigonal borate stretching modes. The Raman band at 660 cm −1 together with bands at 597, 642 679, 705 and 721 cm −1 are assigned to the trigonal and tetrahedral borate bending modes. The molecular structure of a natural chambersite has been assessed using vibrational spectroscopy.
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Assessment of the molecular structure of the borate mineral boracite Mg3B7O13Cl using vibrational spectroscopy.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2012Co-Authors: Ray L. Frost, Yunfei Xi, Ricardo ScholzAbstract:Boracite is a magnesium borate mineral with formula: Mg3B7O13Cl and occurs as blue green, colorless, gray, yellow to white Crystals in the orthorhombic – Pyramidal Crystal system. An intense Raman band at 1009 cm−1 was assigned to the BO stretching vibration of the B7O13 units. Raman bands at 1121, 1136, 1143 cm−1 are attributed to the in-plane bending vibrations of trigonal boron. Four sharp Raman bands observed at 415, 494, 621 and 671 cm−1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3405 and 3494 cm−1, thus indicating that some Cl anions have been replaced with OH units. The molecular structure of a natural boracite has been assessed by using vibrational spectroscopy.
Ray L. Frost - One of the best experts on this subject based on the ideXlab platform.
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Vibrational Spectroscopy of the Borate Mineral Priceite—Implications for the Molecular Structure
Spectroscopy Letters, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:ABSTRACT Priceite is a calcium borate mineral and occurs as white Crystals in the monoclinic Pyramidal Crystal system. We have used a combination of Raman spectroscopy with complimentary infrared spectroscopy and scanning electron microscopy with Energy-dispersive X-ray Spectroscopy (EDS) to study the mineral priceite. Chemical analysis shows a pure phase consisting of B and Ca only. Raman bands at 956, 974, 991, and 1019 cm−1 are assigned to the BO stretching vibration of the B10O19 units. Raman bands at 1071, 1100, 1127, 1169, and 1211 cm−1 are attributed to the BOH in-plane bending modes. The intense infrared band at 805 cm−1 is assigned to the trigonal borate stretching modes. The Raman band at 674 cm−1 together with bands at 689, 697, 736, and 602 cm−1 are assigned to the trigonal and tetrahedral borate bending modes. Raman spectroscopy in the hydroxyl stretching region shows a series of bands with intense Raman band at 3555 cm−1 with a distinct shoulder at 3568 cm−1. Other bands in this spectral reg...
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Vibrational spectroscopy of the borate mineral tunellite SrB6O9(OH)2·3(H2O) : implications for the molecular structure
Science & Engineering Faculty, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Tunellite is a strontium borate mineral with formula: SrB6O9(OH)2∙3(H2O) and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. An intense Raman band at 994 cm-1 was assigned to the BO stretching vibration of the B2O3 units. Raman bands at 1043, 1063, 1082 and 1113 cm-1 are attributed to the in-plane bending vibrations of trigonal boron. Sharp Raman bands observed at 464, 480, 523, 568 and 639 cm-1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3567 and 3614 cm-1, attributed to OH units. The molecular structure of a natural tunellite has been assessed by using vibrational spectroscopy.
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Vibrational spectroscopy of the borate mineral tunellite SrB6O9(OH)2·3(H2O) – Implications for the molecular structure
Journal of Molecular Structure, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Abstract Tunellite is a strontium borate mineral with formula: SrB6O9(OH)2·3(H2O) and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. An intense Raman band at 994 cm−1 was assigned to the BO stretching vibration of the B2O3 units. Raman bands at 1043, 1063, 1082 and 1113 cm−1 are attributed to the in-plane bending vibrations of trigonal boron. Sharp Raman bands observed at 464, 480, 523, 568 and 639 cm−1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3567 and 3614 cm−1, attributed to OH units. The molecular structure of a natural tunellite has been assessed by using vibrational spectroscopy.
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Vibrational spectroscopy of the borate mineral chambersite MnB7O13Cl--implications for the molecular structure.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2013Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Abstract Chambersite is a manganese borate mineral with formula: MnB 7 O 13 Cl and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. Raman bands at 902, 920, 942 and 963 cm −1 are assigned to the BO stretching vibration of the B 7 O 13 units. Raman bands at 1027, 1045, 1056, 1075 and 1091 cm −1 are attributed to the BCl in-plane bending modes. The intense infrared band at 866 cm −1 is assigned to the trigonal borate stretching modes. The Raman band at 660 cm −1 together with bands at 597, 642 679, 705 and 721 cm −1 are assigned to the trigonal and tetrahedral borate bending modes. The molecular structure of a natural chambersite has been assessed using vibrational spectroscopy.
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Assessment of the molecular structure of the borate mineral boracite Mg3B7O13Cl using vibrational spectroscopy.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2012Co-Authors: Ray L. Frost, Yunfei Xi, Ricardo ScholzAbstract:Boracite is a magnesium borate mineral with formula: Mg3B7O13Cl and occurs as blue green, colorless, gray, yellow to white Crystals in the orthorhombic – Pyramidal Crystal system. An intense Raman band at 1009 cm−1 was assigned to the BO stretching vibration of the B7O13 units. Raman bands at 1121, 1136, 1143 cm−1 are attributed to the in-plane bending vibrations of trigonal boron. Four sharp Raman bands observed at 415, 494, 621 and 671 cm−1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3405 and 3494 cm−1, thus indicating that some Cl anions have been replaced with OH units. The molecular structure of a natural boracite has been assessed by using vibrational spectroscopy.
Ricardo Scholz - One of the best experts on this subject based on the ideXlab platform.
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Vibrational Spectroscopy of the Borate Mineral Priceite—Implications for the Molecular Structure
Spectroscopy Letters, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:ABSTRACT Priceite is a calcium borate mineral and occurs as white Crystals in the monoclinic Pyramidal Crystal system. We have used a combination of Raman spectroscopy with complimentary infrared spectroscopy and scanning electron microscopy with Energy-dispersive X-ray Spectroscopy (EDS) to study the mineral priceite. Chemical analysis shows a pure phase consisting of B and Ca only. Raman bands at 956, 974, 991, and 1019 cm−1 are assigned to the BO stretching vibration of the B10O19 units. Raman bands at 1071, 1100, 1127, 1169, and 1211 cm−1 are attributed to the BOH in-plane bending modes. The intense infrared band at 805 cm−1 is assigned to the trigonal borate stretching modes. The Raman band at 674 cm−1 together with bands at 689, 697, 736, and 602 cm−1 are assigned to the trigonal and tetrahedral borate bending modes. Raman spectroscopy in the hydroxyl stretching region shows a series of bands with intense Raman band at 3555 cm−1 with a distinct shoulder at 3568 cm−1. Other bands in this spectral reg...
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Vibrational spectroscopy of the borate mineral tunellite SrB6O9(OH)2·3(H2O) : implications for the molecular structure
Science & Engineering Faculty, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Tunellite is a strontium borate mineral with formula: SrB6O9(OH)2∙3(H2O) and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. An intense Raman band at 994 cm-1 was assigned to the BO stretching vibration of the B2O3 units. Raman bands at 1043, 1063, 1082 and 1113 cm-1 are attributed to the in-plane bending vibrations of trigonal boron. Sharp Raman bands observed at 464, 480, 523, 568 and 639 cm-1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3567 and 3614 cm-1, attributed to OH units. The molecular structure of a natural tunellite has been assessed by using vibrational spectroscopy.
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Vibrational spectroscopy of the borate mineral tunellite SrB6O9(OH)2·3(H2O) – Implications for the molecular structure
Journal of Molecular Structure, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Abstract Tunellite is a strontium borate mineral with formula: SrB6O9(OH)2·3(H2O) and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. An intense Raman band at 994 cm−1 was assigned to the BO stretching vibration of the B2O3 units. Raman bands at 1043, 1063, 1082 and 1113 cm−1 are attributed to the in-plane bending vibrations of trigonal boron. Sharp Raman bands observed at 464, 480, 523, 568 and 639 cm−1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3567 and 3614 cm−1, attributed to OH units. The molecular structure of a natural tunellite has been assessed by using vibrational spectroscopy.
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Vibrational spectroscopy of the borate mineral chambersite MnB7O13Cl--implications for the molecular structure.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2013Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Abstract Chambersite is a manganese borate mineral with formula: MnB 7 O 13 Cl and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. Raman bands at 902, 920, 942 and 963 cm −1 are assigned to the BO stretching vibration of the B 7 O 13 units. Raman bands at 1027, 1045, 1056, 1075 and 1091 cm −1 are attributed to the BCl in-plane bending modes. The intense infrared band at 866 cm −1 is assigned to the trigonal borate stretching modes. The Raman band at 660 cm −1 together with bands at 597, 642 679, 705 and 721 cm −1 are assigned to the trigonal and tetrahedral borate bending modes. The molecular structure of a natural chambersite has been assessed using vibrational spectroscopy.
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Assessment of the molecular structure of the borate mineral boracite Mg3B7O13Cl using vibrational spectroscopy.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2012Co-Authors: Ray L. Frost, Yunfei Xi, Ricardo ScholzAbstract:Boracite is a magnesium borate mineral with formula: Mg3B7O13Cl and occurs as blue green, colorless, gray, yellow to white Crystals in the orthorhombic – Pyramidal Crystal system. An intense Raman band at 1009 cm−1 was assigned to the BO stretching vibration of the B7O13 units. Raman bands at 1121, 1136, 1143 cm−1 are attributed to the in-plane bending vibrations of trigonal boron. Four sharp Raman bands observed at 415, 494, 621 and 671 cm−1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3405 and 3494 cm−1, thus indicating that some Cl anions have been replaced with OH units. The molecular structure of a natural boracite has been assessed by using vibrational spectroscopy.
Rainer Mattes - One of the best experts on this subject based on the ideXlab platform.
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Notizen: Kristallstruktur von μ-Oxo-bis[oxo-salicylaldehydbenzoylhydrazonato(2 —)]vanadium(V) / Crystal Structure of μ-Oxo-bis[oxo-salicylaldehydbenzoylhydrazonato(2 —)]vanadium(V)
Zeitschrift für Naturforschung B, 1993Co-Authors: Angelika Sundheim, Rainer MattesAbstract:The dimeric title complex contains a V2O34+ unit with a rather small (112.6°) V-O-V angle and exhibits Crystallographic C2 symmetry. Each vanadium center is equatorially coordinated by the tridentate doubly deprotonated hydrazone formed from salicylaldehyde and benzoylhydrazine. The coordination sphere is distorted square Pyramidal. Crystal data: orthorhombic, space group Pnc2, a = 758.2(2), b = 1454.4(3), c = 1186.1(2) pm, Z = 4, 1137 reflections, 184 parameters, R (Rw) = 0.032 (0.032).
Andrés López - One of the best experts on this subject based on the ideXlab platform.
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Vibrational Spectroscopy of the Borate Mineral Priceite—Implications for the Molecular Structure
Spectroscopy Letters, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:ABSTRACT Priceite is a calcium borate mineral and occurs as white Crystals in the monoclinic Pyramidal Crystal system. We have used a combination of Raman spectroscopy with complimentary infrared spectroscopy and scanning electron microscopy with Energy-dispersive X-ray Spectroscopy (EDS) to study the mineral priceite. Chemical analysis shows a pure phase consisting of B and Ca only. Raman bands at 956, 974, 991, and 1019 cm−1 are assigned to the BO stretching vibration of the B10O19 units. Raman bands at 1071, 1100, 1127, 1169, and 1211 cm−1 are attributed to the BOH in-plane bending modes. The intense infrared band at 805 cm−1 is assigned to the trigonal borate stretching modes. The Raman band at 674 cm−1 together with bands at 689, 697, 736, and 602 cm−1 are assigned to the trigonal and tetrahedral borate bending modes. Raman spectroscopy in the hydroxyl stretching region shows a series of bands with intense Raman band at 3555 cm−1 with a distinct shoulder at 3568 cm−1. Other bands in this spectral reg...
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Vibrational spectroscopy of the borate mineral tunellite SrB6O9(OH)2·3(H2O) : implications for the molecular structure
Science & Engineering Faculty, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Tunellite is a strontium borate mineral with formula: SrB6O9(OH)2∙3(H2O) and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. An intense Raman band at 994 cm-1 was assigned to the BO stretching vibration of the B2O3 units. Raman bands at 1043, 1063, 1082 and 1113 cm-1 are attributed to the in-plane bending vibrations of trigonal boron. Sharp Raman bands observed at 464, 480, 523, 568 and 639 cm-1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3567 and 3614 cm-1, attributed to OH units. The molecular structure of a natural tunellite has been assessed by using vibrational spectroscopy.
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Vibrational spectroscopy of the borate mineral tunellite SrB6O9(OH)2·3(H2O) – Implications for the molecular structure
Journal of Molecular Structure, 2014Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Abstract Tunellite is a strontium borate mineral with formula: SrB6O9(OH)2·3(H2O) and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. An intense Raman band at 994 cm−1 was assigned to the BO stretching vibration of the B2O3 units. Raman bands at 1043, 1063, 1082 and 1113 cm−1 are attributed to the in-plane bending vibrations of trigonal boron. Sharp Raman bands observed at 464, 480, 523, 568 and 639 cm−1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3567 and 3614 cm−1, attributed to OH units. The molecular structure of a natural tunellite has been assessed by using vibrational spectroscopy.
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Vibrational spectroscopy of the borate mineral chambersite MnB7O13Cl--implications for the molecular structure.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2013Co-Authors: Ray L. Frost, Andrés López, Ricardo Scholz, Yunfei XiAbstract:Abstract Chambersite is a manganese borate mineral with formula: MnB 7 O 13 Cl and occurs as colorless Crystals in the monoclinic Pyramidal Crystal system. Raman bands at 902, 920, 942 and 963 cm −1 are assigned to the BO stretching vibration of the B 7 O 13 units. Raman bands at 1027, 1045, 1056, 1075 and 1091 cm −1 are attributed to the BCl in-plane bending modes. The intense infrared band at 866 cm −1 is assigned to the trigonal borate stretching modes. The Raman band at 660 cm −1 together with bands at 597, 642 679, 705 and 721 cm −1 are assigned to the trigonal and tetrahedral borate bending modes. The molecular structure of a natural chambersite has been assessed using vibrational spectroscopy.
