The Experts below are selected from a list of 13035 Experts worldwide ranked by ideXlab platform
Jiang-gao Mao - One of the best experts on this subject based on the ideXlab platform.
-
two barium gold Iodates syntheses structures and properties of polar baau io3 5 and nonpolar hba4au io3 12 materials
Inorganic Chemistry, 2017Co-Authors: Bing-ping Yang, Fei-fei Mao, Jiang-gao MaoAbstract:Two new barium gold Iodates, namely, BaAu(IO3)5 and HBa4Au(IO3)12, have been prepared. BaAu(IO3)5 crystallizes in the polar space group Pca21, whereas HBa4Au(IO3)12 crystallizes in the centrosymmetric space group P21/c. BaAu(IO3)5 consists of unique polar [Au(IO3)4]− anions whose four iodate groups are located at both sides of the AuO4 plane and the polarity points in the [001] direction. BaAu(IO3)5 displays strong second-harmonic-generation (SHG) effects about 0.6KTiOPO4 (KTP) and is phase-matchable. Thermal properties, optical spectra analyses, and theoretical calculations are also reported.
-
Acentric La3(IO3)8(OH) and La(IO3)2(NO3): Partial Substitution of Iodate Anions in La(IO3)3 by Hydroxide or Nitrate Anion
2017Co-Authors: Fei-fei Mao, Jiang-gao MaoAbstract:Partial substitution of iodate anions in La(IO3)3 by OH– or NO3– anion led to acentric La3(IO3)8(OH) and chiral La(IO3)2(NO3). The structure of La3(IO3)8(OH) can be seen as a complex three-dimensional (3D) network composed of two-dimensional [La3(IO3)2(OH)]6+ cationic layers that are further bridged by remaining iodate anions, or alternatively as a 3D network composed of one-dimensional [La3(IO3)6(OH)]2+ cationic columns being further interconnected by additional iodate anions, while the structure of La(IO3)2(NO3) can be seen as a novel 3D structure with planar NO3 groups serving as linkage between the [La3(IO3)6]3+ triple layers. Compared to La(IO3)3, both compounds show considerably wide band gaps and enhanced thermal stability. La(IO3)2(NO3) shows a moderate second harmonic generation (SHG) response of ∼0.6 times that of KDP (KH2PO4), a wide band gap of 4.23 eV, and a high LDT value (22 × AgGaS2). Optical property measurements, thermal analysis, as well as theoretical calculations on SHG origin, were performed. It can be deduced that partial substitution of iodate anions can be a facile route to design new noncentrosymmetric metal Iodates with novel structure and potential application
-
Two Barium Gold Iodates: Syntheses, Structures, and Properties of Polar BaAu(IO3)5 and Nonpolar HBa4Au(IO3)12 Materials
2017Co-Authors: Bing-ping Yang, Fei-fei Mao, Jiang-gao MaoAbstract:Two new barium gold Iodates, namely, BaAu(IO3)5 and HBa4Au(IO3)12, have been prepared. BaAu(IO3)5 crystallizes in the polar space group Pca21, whereas HBa4Au(IO3)12 crystallizes in the centrosymmetric space group P21/c. BaAu(IO3)5 consists of unique polar [Au(IO3)4]− anions whose four iodate groups are located at both sides of the AuO4 plane and the polarity points in the [001̅] direction. BaAu(IO3)5 displays strong second-harmonic-generation (SHG) effects about 0.6KTiOPO4 (KTP) and is phase-matchable. Thermal properties, optical spectra analyses, and theoretical calculations are also reported
-
Recent advances on second-order NLO materials based on metal Iodates
Coordination Chemistry Reviews, 2015Co-Authors: Jiang-gao MaoAbstract:Abstract Metal Iodates with a lone-pair containing I(V) in an asymmetric coordination geometry can form a diversity of unusual structures, including non-centrosymmetric (NCS) structures with promising second-order nonlinear optical (NLO) properties. They have wide transparent wavelength regions (0.4–12 μm), large second harmonic generation (SHG) coefficients (>10 × KDP for many Iodates) and high optical-damage thresholds (4–50 GW cm −2 ) as well as good thermal stability (usually >400 °C). In this review, the structures and second-order NLO properties of metal Iodates will be discussed. Under reaction media with a high concentration of iodic acid, the iodate groups can be condensed into binuclear or polynuclear iodate anions, these compounds are able to display large SHG responses. The introduction of other lone pair containing cations into the iodate system is also an effective strategy to design new NCS materials. The combination of d 0 transition-metal cations with iodate groups afforded a large number of NCS metal Iodates with anionic structures ranging from 0D clusters, 1D chains, 2D layers to 3D networks. These NCS materials can display excellent second-order NLO properties when the polarizations from both types of the asymmetric units are aligned properly. As for the Iodates of d 8 -transition metal ion with a square planar TMO 4 geometry, the cis TM(IO 3 ) 4 unit in which the four iodate groups are located at the same side of the TMO 4 plane favors the formation of NCS structures whereas the trans - one in which the four iodate groups being located at both sides of the TMO 4 square plane prefers to a centrosymmetric structure. NCS structures with good SHG properties can also be found in other mixed metal iodate systems.
-
synthesis crystal structure and optical properties of two new layered cadmium Iodates cd io 3 x x cl oh
Journal of Solid State Chemistry, 2014Co-Authors: Bing-ping Yang, Jiang-gao MaoAbstract:Abstract Systematic explorations of new compounds in the cadmium iodate system by hydrothermal reactions led to two layered Iodates, namely, Cd(IO3)X (X=Cl, OH). Cd(IO3)Cl crystallizes in the orthorhombic space group Cmca (No. 64) whereas Cd(IO3)(OH) crystallizes in the orthorhombic space group Pnma (No. 62). Cd(IO3)Cl displays a unique double layered structure composed of [ Cd − O 3 Cl ] n ∞ 1 chains. Cadmium octahedrons form a 1D chain along the a-axis through edge sharing, and such chains are further interconnected via IO3 groups to form a special double layer on (020) plane. Cd(IO3)(OH) also exhibits a layered structure that is composed of cadmium cations, IO3 groups and hydroxyl ions. Within a layer, chains of CdO6 edge-shared octahedra are observed along the b-axis. And these chains are connected by IO3 groups into a layer parallel to the bc plane. Spectroscopic characterizations, elemental analysis, and thermogravimetric analysis for the reported two compounds are also presented.
Thomas E Albrechtschmitt - One of the best experts on this subject based on the ideXlab platform.
-
magnetism and raman spectroscopy of the dimeric lanthanide Iodates ln io3 3 ln gd er and magnetism of yb io3 3
Journal of Solid State Chemistry, 2008Co-Authors: Richard E Sykora, Thomas E Albrechtschmitt, Peter G Khalifah, Zerihun Assefa, R G HaireAbstract:Colorless single crystals of Gd(IO{sub 3}){sub 3} or pale pink single crystals of Er(IO{sub 3}){sub 3} have been formed from the reaction of Gd metal with H{sub 5}IO{sub 6} or Er metal with H{sub 5}IO{sub 6} under hydrothermal reaction conditions at 180 deg. C. The structures of both materials adopt the Bi(IO{sub 3}){sub 3} structure type. Crystallographic data are (MoK{alpha}, {lambda}=0.71073 A): Gd(IO{sub 3}){sub 3}, monoclinic, space group P2{sub 1}/n, a=8.7615(3) A, b=5.9081(2) A, c=15.1232(6) A, {beta}=96.980(1){sup o}, V=777.03(5) Z=4, R(F)=1.68% for 119 parameters with 1930 reflections with I>2{sigma}(I); Er(IO{sub 3}){sub 3}, monoclinic, space group P2{sub 1}/n, a=8.6885(7) A, b=5.9538(5) A, c=14.9664(12) A, {beta}=97.054(1){sup o}, V=768.4(1) Z=4, R(F)=2.26% for 119 parameters with 1894 reflections with I>2{sigma}(I). In addition to structural studies, Gd(IO{sub 3}){sub 3}, Er(IO{sub 3}){sub 3}, and the isostructural Yb(IO{sub 3}){sub 3} were also characterized by Raman spectroscopy and magnetic property measurements. The results of the Raman studies indicated that the vibrational profiles are adequately sensitive to distinguish between the structures of the Iodates reported here and other lanthanide iodate systems. The magnetic measurements indicate that only in Gd(IO{sub 3}){sub 3} did the 3+ lanthanide ion exhibit its full 7.9 {mu}{sub B} Hund's rule moment; Er{sup 3+} and Yb{supmore » 3+} exhibited ground state moments and gap energy scales of 8.3 {mu}{sub B}/70 K and 3.8 {mu}{sub B}/160 K, respectively. Er(IO{sub 3}){sub 3} exhibited extremely weak ferromagnetic correlations (+0.4 K), while the magnetic ions in Gd(IO{sub 3}){sub 3} and Yb(IO{sub 3}){sub 3} were fully non-interacting within the resolution of our measurements ({approx}0.2 K). - Graphical abstract: Three f-element Iodates Ln(IO{sub 3}){sub 3} (Ln=Gd, Er, Yb), all containing the Bi(IO{sub 3}){sub 3} structure type, were characterized by Raman spectroscopy and magnetic property measurements. The results of the Raman studies indicated that the vibrational profiles are adequately sensitive to distinguish between the structures of the Iodates reported here and other lanthanide iodate systems. The magnetic measurements indicate that only in Gd(IO{sub 3}){sub 3} did the 3+ lanthanide ion exhibit its full 7.9 {mu}{sub B} Hund's rule moment; Er{sup 3+} and Yb{sup 3+} exhibited ground state moments and gap energy scales of 8.3 {mu}{sub B}/70 K and 3.8 {mu}{sub B}/160 K, respectively. Er(IO{sub 3}){sub 3} exhibited extremely weak ferromagnetic correlations (+0.4 K), while the magnetic ions in Gd(IO{sub 3}){sub 3} and Yb(IO{sub 3}){sub 3} were fully non-interacting within the resolution of our measurements ({approx}0.2 K)« less
-
critical role of water content in the formation and reactivity of uranium neptunium and plutonium Iodates under hydrothermal conditions implications for the oxidative dissolution of spent nuclear fuel
Inorganic Chemistry, 2007Co-Authors: Travis H Bray, Jie Ling, Eun Sang Choi, J S Brooks, James V Beitz, Richard E Sykora, R G Haire, David M Stanbury, Thomas E AlbrechtschmittAbstract:The reactions of 237NpO2 with excess iodate under acidic hydrothermal conditions result in the isolation of the neptunium(IV), neptunium(V), and neptunium(VI) Iodates, Np(IO3)4, Np(IO3)4·nH2O·nHIO3, NpO2(IO3), NpO2(IO3)2(H2O), and NpO2(IO3)2·H2O, depending on both the pH and the amount of water present in the reactions. Reactions with less water and lower pH favor reduced products. Although the initial redox processes involved in the reactions between 237NpO2 or 242PuO2 and iodate are similar, the low solubility of Pu(IO3)4 dominates product formation in plutonium iodate reactions to a much greater extent than does Np(IO3)4 in the neptunium iodate system. UO2 reacts with iodate under these conditions to yield uranium(VI) Iodates solely. The isotypic structures of the actinide(IV) Iodates, An(IO3)4 (An = Np, Pu), are reported and consist of one-dimensional chains of dodecahedral An(IV) cations bridged by iodate anions. The structure of Np(IO3)4·nH2O·nHIO3 is constructed from NpO9 tricapped-trigonal prisms ...
-
isolation of intermediate valent ce iii ce iv hydrolysis products in the preparation of cerium Iodates electronic and structural aspects of ce2 io3 6 ohx x 0 and 0 44
Chemistry of Materials, 2004Co-Authors: Richard E Sykora, Laura Deakin, Arthur Mar, S Skanthakumar, And L Soderholm, Thomas E AlbrechtschmittAbstract:The layered cerium Iodates Ce2(IO3)6(OHx) [x ≈ 0 (1) and 0.44 (2)] have been prepared from the reaction of (NH4)2Ce(NO3)6 with I2O5 at 180 °C in aqueous media. The structure of these compounds consists of square antiprismatic Ce centers that are bound by bridging iodate anions and one bridging oxo anion. The structure of 2 differs from that of 1 in that the bridging oxo atom is partially protonated, resulting in significant lengthening of the Ce−O bond from 2.050(1) to 2.212(2) A. This protonation also results in partial reduction of 1 from a formally all Ce4+ compound to an intermediate-valent ion with both Ce3+ and Ce4+ that is visually observed with a color change in the crystals from bright yellow to dark brown for 1 and 2, respectively. Magnetic susceptibility measurements on 1 show there to be a small paramagnetic impurity phase that is consistent with about 1% Ce3+ in the sample. Similar measurements on 2 show that it contains at least 22% Ce3+, determined from a measured effective moment of 1.19(5...
-
new one dimensional uranyl and neptunyl Iodates crystal structures of k3 uo2 2 io3 6 io3 h2o and k npo2 io3 3 1 5h2o
Journal of Solid State Chemistry, 2004Co-Authors: Richard E Sykora, Amanda C. Bean, Brian L. Scott, Wolfgang Runde, Thomas E AlbrechtschmittAbstract:Abstract The uranyl and neptunyl(VI) Iodates, K3[(UO2)2(IO3)6](IO3)·H2O (1) and K[NpO2(IO3)3]·1.5H2O (2) , have been prepared and crystallized under mild hydrothermal conditions. The structures of 1 and 2 both contain one-dimensional ∞1[AnO2(IO3)3]1−(An=U,Np) ribbons that consist of approximately linear actinyl(VI) cations bound by iodate anions to yield AnO7 pentagonal bipyramids. The AnO7 units are linked by bridging iodate anions to yield chains that are in turn coupled by additional iodate anions to yield ribbons. The edges of the ribbons are terminated by monodentate iodate anions. For 1 and 2 , K+ cations and water molecules separate the ribbons from one another. In addition, isolated iodate anions are also found between ∞1[UO2(IO3)3]1− ribbons in 1 . In order to aid in the assignment of oxidation states in neptunyl containing compounds, a bond-valence sum parameter of 2.018 A for Np(VI) bound exclusively to oxygen has been developed with b=0.37 A. Crystallographic data (193 K, MoKα, λ=0.71073): 1 , triclinic, P 1 , a=7.0609(4) A, b=14.5686(8) A, c=14.7047(8) A, α=119.547(1)°, β=95.256(1)°, γ=93.206(1)°, Z=2, R(F)=2.49% for 353 parameters with 6414 reflections with I>2σ(I); (203 K, MoKα, λ=0.71073): 2, monoclinic, P21/c, a=7.796(4) A, b=7.151(3) A, c=21.79(1) A, β=97.399(7)°, Z=4, R(F)=6.33% for 183 parameters with 2451 reflections with I>2σ(I).
-
mixed metal uranium vi Iodates hydrothermal syntheses structures and reactivity of rb uo 2 cro 4 io 3 h 2 o a 2 uo 2 cro 4 io 3 2 a k rb cs and k 2 uo 2 moo 4 io 3 2
Inorganic Chemistry, 2002Co-Authors: Richard E Sykora, Daniel M Wells, Steven M Mcdaniel, Thomas E AlbrechtschmittAbstract:The reactions of the molecular transition metal Iodates A[CrO(3)(IO(3))] (A = K, Rb, Cs) with UO(3) under mild hydrothermal conditions provide access to four new, one-dimensional, uranyl chromatoIodates, Rb[UO(2)(CrO(4))(IO(3))(H(2)O)] (1) and A(2)[UO(2)(CrO(4))(IO(3))(2)] (A = K (2), Rb (3), Cs (4)). Under basic conditions, MoO(3), UO(3), and KIO(4) can be reacted to form K(2)[UO(2)(MoO(4))(IO(3))(2)] (5), which is isostructural with 2 and 3. The structure of 1 consists of one-dimensional[UO(2)(CrO(4))(IO(3))(H(2)O)](-) ribbons that contain uranyl moieties bound by bridging chromate and iodate anions as well as a terminal water molecule to create [UO(7)] pentagonal bipyramidal environments around the U(VI) centers. These ribbons are separated from one another by Rb(+) cations. When the iodate content is increased in the hydrothermal reactions, the terminal water molecule is replaced by a monodentate iodate anion to yield 2-4. These ribbons can be further modified by replacing tetrahedral chromate anions with MoO(4)(2)(-) anions to yield isostructural, one-dimensional [UO(2)(MoO(4))(IO(3))(2)](2)(-) ribbons. Crystallographic data: 1, triclinic, space group P(-)1, a = 7.3133(5) A, b = 8.0561(6) A, c = 8.4870(6) A, alpha = 88.740(1) degrees, beta = 87.075(1) degrees, gamma = 71.672(1) degrees, Z = 2; 2, monoclinic, space group P2(1)/c, a = 11.1337(5) A, b = 7.2884(4) A, c = 15.5661(7) A, beta = 107.977(1) degrees, Z = 4; 3, monoclinic, space group P2(1)/c, a = 11.3463(6) A, b = 7.3263(4) A, c = 15.9332(8) A, beta = 108.173(1) degrees, Z = 4; 4, monoclinic, space group P2(1)/n, a = 7.3929(5) A, b = 8.1346(6) A, c = 22.126(2) A, beta = 90.647(1) degrees, Z = 4; 5, monoclinic, space group P2(1)/c, a = 11.3717(6) A, b = 7.2903(4) A, c = 15.7122(8) A, beta = 108.167(1) degrees, Z = 4.
Richard E Sykora - One of the best experts on this subject based on the ideXlab platform.
-
magnetism and raman spectroscopy of the dimeric lanthanide Iodates ln io3 3 ln gd er and magnetism of yb io3 3
Journal of Solid State Chemistry, 2008Co-Authors: Richard E Sykora, Thomas E Albrechtschmitt, Peter G Khalifah, Zerihun Assefa, R G HaireAbstract:Colorless single crystals of Gd(IO{sub 3}){sub 3} or pale pink single crystals of Er(IO{sub 3}){sub 3} have been formed from the reaction of Gd metal with H{sub 5}IO{sub 6} or Er metal with H{sub 5}IO{sub 6} under hydrothermal reaction conditions at 180 deg. C. The structures of both materials adopt the Bi(IO{sub 3}){sub 3} structure type. Crystallographic data are (MoK{alpha}, {lambda}=0.71073 A): Gd(IO{sub 3}){sub 3}, monoclinic, space group P2{sub 1}/n, a=8.7615(3) A, b=5.9081(2) A, c=15.1232(6) A, {beta}=96.980(1){sup o}, V=777.03(5) Z=4, R(F)=1.68% for 119 parameters with 1930 reflections with I>2{sigma}(I); Er(IO{sub 3}){sub 3}, monoclinic, space group P2{sub 1}/n, a=8.6885(7) A, b=5.9538(5) A, c=14.9664(12) A, {beta}=97.054(1){sup o}, V=768.4(1) Z=4, R(F)=2.26% for 119 parameters with 1894 reflections with I>2{sigma}(I). In addition to structural studies, Gd(IO{sub 3}){sub 3}, Er(IO{sub 3}){sub 3}, and the isostructural Yb(IO{sub 3}){sub 3} were also characterized by Raman spectroscopy and magnetic property measurements. The results of the Raman studies indicated that the vibrational profiles are adequately sensitive to distinguish between the structures of the Iodates reported here and other lanthanide iodate systems. The magnetic measurements indicate that only in Gd(IO{sub 3}){sub 3} did the 3+ lanthanide ion exhibit its full 7.9 {mu}{sub B} Hund's rule moment; Er{sup 3+} and Yb{supmore » 3+} exhibited ground state moments and gap energy scales of 8.3 {mu}{sub B}/70 K and 3.8 {mu}{sub B}/160 K, respectively. Er(IO{sub 3}){sub 3} exhibited extremely weak ferromagnetic correlations (+0.4 K), while the magnetic ions in Gd(IO{sub 3}){sub 3} and Yb(IO{sub 3}){sub 3} were fully non-interacting within the resolution of our measurements ({approx}0.2 K). - Graphical abstract: Three f-element Iodates Ln(IO{sub 3}){sub 3} (Ln=Gd, Er, Yb), all containing the Bi(IO{sub 3}){sub 3} structure type, were characterized by Raman spectroscopy and magnetic property measurements. The results of the Raman studies indicated that the vibrational profiles are adequately sensitive to distinguish between the structures of the Iodates reported here and other lanthanide iodate systems. The magnetic measurements indicate that only in Gd(IO{sub 3}){sub 3} did the 3+ lanthanide ion exhibit its full 7.9 {mu}{sub B} Hund's rule moment; Er{sup 3+} and Yb{sup 3+} exhibited ground state moments and gap energy scales of 8.3 {mu}{sub B}/70 K and 3.8 {mu}{sub B}/160 K, respectively. Er(IO{sub 3}){sub 3} exhibited extremely weak ferromagnetic correlations (+0.4 K), while the magnetic ions in Gd(IO{sub 3}){sub 3} and Yb(IO{sub 3}){sub 3} were fully non-interacting within the resolution of our measurements ({approx}0.2 K)« less
-
critical role of water content in the formation and reactivity of uranium neptunium and plutonium Iodates under hydrothermal conditions implications for the oxidative dissolution of spent nuclear fuel
Inorganic Chemistry, 2007Co-Authors: Travis H Bray, Jie Ling, Eun Sang Choi, J S Brooks, James V Beitz, Richard E Sykora, R G Haire, David M Stanbury, Thomas E AlbrechtschmittAbstract:The reactions of 237NpO2 with excess iodate under acidic hydrothermal conditions result in the isolation of the neptunium(IV), neptunium(V), and neptunium(VI) Iodates, Np(IO3)4, Np(IO3)4·nH2O·nHIO3, NpO2(IO3), NpO2(IO3)2(H2O), and NpO2(IO3)2·H2O, depending on both the pH and the amount of water present in the reactions. Reactions with less water and lower pH favor reduced products. Although the initial redox processes involved in the reactions between 237NpO2 or 242PuO2 and iodate are similar, the low solubility of Pu(IO3)4 dominates product formation in plutonium iodate reactions to a much greater extent than does Np(IO3)4 in the neptunium iodate system. UO2 reacts with iodate under these conditions to yield uranium(VI) Iodates solely. The isotypic structures of the actinide(IV) Iodates, An(IO3)4 (An = Np, Pu), are reported and consist of one-dimensional chains of dodecahedral An(IV) cations bridged by iodate anions. The structure of Np(IO3)4·nH2O·nHIO3 is constructed from NpO9 tricapped-trigonal prisms ...
-
isolation of intermediate valent ce iii ce iv hydrolysis products in the preparation of cerium Iodates electronic and structural aspects of ce2 io3 6 ohx x 0 and 0 44
Chemistry of Materials, 2004Co-Authors: Richard E Sykora, Laura Deakin, Arthur Mar, S Skanthakumar, And L Soderholm, Thomas E AlbrechtschmittAbstract:The layered cerium Iodates Ce2(IO3)6(OHx) [x ≈ 0 (1) and 0.44 (2)] have been prepared from the reaction of (NH4)2Ce(NO3)6 with I2O5 at 180 °C in aqueous media. The structure of these compounds consists of square antiprismatic Ce centers that are bound by bridging iodate anions and one bridging oxo anion. The structure of 2 differs from that of 1 in that the bridging oxo atom is partially protonated, resulting in significant lengthening of the Ce−O bond from 2.050(1) to 2.212(2) A. This protonation also results in partial reduction of 1 from a formally all Ce4+ compound to an intermediate-valent ion with both Ce3+ and Ce4+ that is visually observed with a color change in the crystals from bright yellow to dark brown for 1 and 2, respectively. Magnetic susceptibility measurements on 1 show there to be a small paramagnetic impurity phase that is consistent with about 1% Ce3+ in the sample. Similar measurements on 2 show that it contains at least 22% Ce3+, determined from a measured effective moment of 1.19(5...
-
new one dimensional uranyl and neptunyl Iodates crystal structures of k3 uo2 2 io3 6 io3 h2o and k npo2 io3 3 1 5h2o
Journal of Solid State Chemistry, 2004Co-Authors: Richard E Sykora, Amanda C. Bean, Brian L. Scott, Wolfgang Runde, Thomas E AlbrechtschmittAbstract:Abstract The uranyl and neptunyl(VI) Iodates, K3[(UO2)2(IO3)6](IO3)·H2O (1) and K[NpO2(IO3)3]·1.5H2O (2) , have been prepared and crystallized under mild hydrothermal conditions. The structures of 1 and 2 both contain one-dimensional ∞1[AnO2(IO3)3]1−(An=U,Np) ribbons that consist of approximately linear actinyl(VI) cations bound by iodate anions to yield AnO7 pentagonal bipyramids. The AnO7 units are linked by bridging iodate anions to yield chains that are in turn coupled by additional iodate anions to yield ribbons. The edges of the ribbons are terminated by monodentate iodate anions. For 1 and 2 , K+ cations and water molecules separate the ribbons from one another. In addition, isolated iodate anions are also found between ∞1[UO2(IO3)3]1− ribbons in 1 . In order to aid in the assignment of oxidation states in neptunyl containing compounds, a bond-valence sum parameter of 2.018 A for Np(VI) bound exclusively to oxygen has been developed with b=0.37 A. Crystallographic data (193 K, MoKα, λ=0.71073): 1 , triclinic, P 1 , a=7.0609(4) A, b=14.5686(8) A, c=14.7047(8) A, α=119.547(1)°, β=95.256(1)°, γ=93.206(1)°, Z=2, R(F)=2.49% for 353 parameters with 6414 reflections with I>2σ(I); (203 K, MoKα, λ=0.71073): 2, monoclinic, P21/c, a=7.796(4) A, b=7.151(3) A, c=21.79(1) A, β=97.399(7)°, Z=4, R(F)=6.33% for 183 parameters with 2451 reflections with I>2σ(I).
-
mixed metal uranium vi Iodates hydrothermal syntheses structures and reactivity of rb uo 2 cro 4 io 3 h 2 o a 2 uo 2 cro 4 io 3 2 a k rb cs and k 2 uo 2 moo 4 io 3 2
Inorganic Chemistry, 2002Co-Authors: Richard E Sykora, Daniel M Wells, Steven M Mcdaniel, Thomas E AlbrechtschmittAbstract:The reactions of the molecular transition metal Iodates A[CrO(3)(IO(3))] (A = K, Rb, Cs) with UO(3) under mild hydrothermal conditions provide access to four new, one-dimensional, uranyl chromatoIodates, Rb[UO(2)(CrO(4))(IO(3))(H(2)O)] (1) and A(2)[UO(2)(CrO(4))(IO(3))(2)] (A = K (2), Rb (3), Cs (4)). Under basic conditions, MoO(3), UO(3), and KIO(4) can be reacted to form K(2)[UO(2)(MoO(4))(IO(3))(2)] (5), which is isostructural with 2 and 3. The structure of 1 consists of one-dimensional[UO(2)(CrO(4))(IO(3))(H(2)O)](-) ribbons that contain uranyl moieties bound by bridging chromate and iodate anions as well as a terminal water molecule to create [UO(7)] pentagonal bipyramidal environments around the U(VI) centers. These ribbons are separated from one another by Rb(+) cations. When the iodate content is increased in the hydrothermal reactions, the terminal water molecule is replaced by a monodentate iodate anion to yield 2-4. These ribbons can be further modified by replacing tetrahedral chromate anions with MoO(4)(2)(-) anions to yield isostructural, one-dimensional [UO(2)(MoO(4))(IO(3))(2)](2)(-) ribbons. Crystallographic data: 1, triclinic, space group P(-)1, a = 7.3133(5) A, b = 8.0561(6) A, c = 8.4870(6) A, alpha = 88.740(1) degrees, beta = 87.075(1) degrees, gamma = 71.672(1) degrees, Z = 2; 2, monoclinic, space group P2(1)/c, a = 11.1337(5) A, b = 7.2884(4) A, c = 15.5661(7) A, beta = 107.977(1) degrees, Z = 4; 3, monoclinic, space group P2(1)/c, a = 11.3463(6) A, b = 7.3263(4) A, c = 15.9332(8) A, beta = 108.173(1) degrees, Z = 4; 4, monoclinic, space group P2(1)/n, a = 7.3929(5) A, b = 8.1346(6) A, c = 22.126(2) A, beta = 90.647(1) degrees, Z = 4; 5, monoclinic, space group P2(1)/c, a = 11.3717(6) A, b = 7.2903(4) A, c = 15.7122(8) A, beta = 108.167(1) degrees, Z = 4.
Bing-ping Yang - One of the best experts on this subject based on the ideXlab platform.
-
two barium gold Iodates syntheses structures and properties of polar baau io3 5 and nonpolar hba4au io3 12 materials
Inorganic Chemistry, 2017Co-Authors: Bing-ping Yang, Fei-fei Mao, Jiang-gao MaoAbstract:Two new barium gold Iodates, namely, BaAu(IO3)5 and HBa4Au(IO3)12, have been prepared. BaAu(IO3)5 crystallizes in the polar space group Pca21, whereas HBa4Au(IO3)12 crystallizes in the centrosymmetric space group P21/c. BaAu(IO3)5 consists of unique polar [Au(IO3)4]− anions whose four iodate groups are located at both sides of the AuO4 plane and the polarity points in the [001] direction. BaAu(IO3)5 displays strong second-harmonic-generation (SHG) effects about 0.6KTiOPO4 (KTP) and is phase-matchable. Thermal properties, optical spectra analyses, and theoretical calculations are also reported.
-
Two Barium Gold Iodates: Syntheses, Structures, and Properties of Polar BaAu(IO3)5 and Nonpolar HBa4Au(IO3)12 Materials
2017Co-Authors: Bing-ping Yang, Fei-fei Mao, Jiang-gao MaoAbstract:Two new barium gold Iodates, namely, BaAu(IO3)5 and HBa4Au(IO3)12, have been prepared. BaAu(IO3)5 crystallizes in the polar space group Pca21, whereas HBa4Au(IO3)12 crystallizes in the centrosymmetric space group P21/c. BaAu(IO3)5 consists of unique polar [Au(IO3)4]− anions whose four iodate groups are located at both sides of the AuO4 plane and the polarity points in the [001̅] direction. BaAu(IO3)5 displays strong second-harmonic-generation (SHG) effects about 0.6KTiOPO4 (KTP) and is phase-matchable. Thermal properties, optical spectra analyses, and theoretical calculations are also reported
-
synthesis crystal structure and optical properties of two new layered cadmium Iodates cd io 3 x x cl oh
Journal of Solid State Chemistry, 2014Co-Authors: Bing-ping Yang, Jiang-gao MaoAbstract:Abstract Systematic explorations of new compounds in the cadmium iodate system by hydrothermal reactions led to two layered Iodates, namely, Cd(IO3)X (X=Cl, OH). Cd(IO3)Cl crystallizes in the orthorhombic space group Cmca (No. 64) whereas Cd(IO3)(OH) crystallizes in the orthorhombic space group Pnma (No. 62). Cd(IO3)Cl displays a unique double layered structure composed of [ Cd − O 3 Cl ] n ∞ 1 chains. Cadmium octahedrons form a 1D chain along the a-axis through edge sharing, and such chains are further interconnected via IO3 groups to form a special double layer on (020) plane. Cd(IO3)(OH) also exhibits a layered structure that is composed of cadmium cations, IO3 groups and hydroxyl ions. Within a layer, chains of CdO6 edge-shared octahedra are observed along the b-axis. And these chains are connected by IO3 groups into a layer parallel to the bc plane. Spectroscopic characterizations, elemental analysis, and thermogravimetric analysis for the reported two compounds are also presented.
-
k4tm4 v2o7 2 io3 4 h2o tm zn ni co a series of quinary mixed metal vanadium v Iodates
CrystEngComm, 2013Co-Authors: Bing-ping Yang, Chao Huang, Jiang-gao MaoAbstract:Systematic explorations of new compounds in the divalent transition metal–vanadium(V)–iodate system by hydrothermal reactions led to three quinary mixed metal Iodates, namely, K4TM4(V2O7)2(IO3)4(H2O) (TM = Zn, Ni, Co). They represent the first examples of quinary mixed metal vanadium Iodates. The structures of K4TM4(V2O7)2(IO3)4(H2O) (TM = Zn, Ni, Co) are quite unusual and consist of sandwich-like double layers of 1∞[TM4(V2O7)2(IO3)4(H2O)]4− that are separated by K+ cations. The interconnection of TMO6 units via tridentate bridging IO3− groups resulted in a 2D sheet parallel to the ab-plane. Two such sheets are bridged by V2O7 units into a unique sandwich-like double layer. V2O7 units are observed in Iodates for the first time. Thermal stability and optical properties as well as magnetic properties for the Co and Ni phases were studied.
-
explorations of a series of second order nonlinear optical materials based on monovalent metal gold iii Iodates
Inorganic Chemistry, 2013Co-Authors: Chao Huang, Bing-ping Yang, Jiang-gao MaoAbstract:The syntheses, crystal structures, and characterizations of a series of monovalent metal gold(III) Iodates, namely, α-NaAu(IO3)4, β-NaAu(IO3)4, RbAu(IO3)4, α-CsAu(IO3)4, β-CsAu(IO3)4, and AgAu(IO3)4 are reported. Their structures feature Au(IO3)4– anions that are separated by alkali metal ions or silver(I) ions. The Au(IO3)4– anions in the polar α-NaAu(IO3)4, RbAu(IO3)4, and α-CsAu(IO3)4 are polar with all four iodate groups being located only above (or below) the AuO4 square plane (cis- configuration). α-NaAu(IO3)4, RbAu(IO3)4, and α-CsAu(IO3)4 display moderate strong Second-Hamonic Generation (SHG) responses of 1.17 ×, 1.33 ×, and 1.17 × KTP (KTiOPO4), respectively, and all three materials are type-I phase-matchable. The Au(IO3)4– anions in centrysymmetric β-NaAu(IO3)4, β-CsAu(IO3)4, and AgAu(IO3)4 are nonpolar with the four iodate groups of the Au(IO3)4– anion being located both above and below the AuO4 square plane (trans- configuration). IR and UV spectra, luminescent and ferroelectric properties hav...
Isabelle Gautierluneau - One of the best experts on this subject based on the ideXlab platform.
-
optical properties of nd3 and yb3 doped agm io3 4 metal Iodates transparent host matrices for mid ir lasers and nonlinear materials
Journal of Materials Chemistry C, 2014Co-Authors: Delphine Phanon, Djamal Benbertal, Yan Suffren, Mohamed B. Taouti, Alain Brenier, Isabelle GautierluneauAbstract:Nine new isomorphic iodate compounds NaM(IO3)4 with M ¼ Y, Nd, Gd and AgM0(IO3)4 with M0 ¼ Y, La, Nd, Eu, Gd, Bi have been synthesized either by evaporation of concentrated nitric acid solution or by hydrothermal synthesis. They crystallize in the monoclinic acentric Cc space group. Typical unit cell parameters for AgY(IO3)4 are a ¼ 31.277(3) °A, b ¼ 5.547(1) °A, c ¼ 12.556(2) °A, b ¼ 91.11(2) , V ¼ 2178.0(6) °A3 and Z ¼ 8. Crystal structures have been solved on single crystals for NaY(IO3)4, AgY(IO3)4, AgLa(IO3)4, AgGd(IO3)4 and AgBi(IO3)4 and on powder for NaNd(IO3)4, NaGd(IO3)4, AgEu(IO3)4 and AgGd(IO3)4. They are thermally stable up to 550 C for NaY(IO3)4, 430 C for AgY(IO3)4, 500 C for AgLa(IO3)4 and 490 C for AgBi(IO3)4. The crystal structure reveals a two-dimensional layered network. The sheets are connected together by I/O interactions. All these metal Iodates generate second harmonics and are transparent up to 12µm. So they are interesting as potential laser matrices in the mid and beginning of the far-infrared. The properties of Nd3+ and Yb3+-doped AgGd(IO3)4 and of Nd3+-doped AgLa(IO3)4 have been studied.
-
new materials for infrared non linear optics syntheses structural characterisations second harmonic generation and optical transparency of m io3 3 metallic Iodates
Journal of Materials Chemistry, 2007Co-Authors: Delphine Phanon, Alain Mosset, Isabelle GautierluneauAbstract:Two new phases α-In(IO3)3 and β-In(IO3)3 have been synthesised by evaporation of concentrated nitric acid solution containing metallic salts and sources of iodate. Single crystal structures reveal an acentric three-dimensional network for α-In(IO3)3 and a centrosymmetric two-dimensional network for β-In(IO3)3. Temperature-dependent X-ray powder diffraction experiments shows the transformation of α-In(IO3)3 to β-In(IO3)3 at 365 °C. The phase transition is not reversible. α-In(IO3)3 is the kinetically favoured phase whereas β-In(IO3)3 is the thermodynamically stable phase. α-In(IO3)3 is isomorphic to Cr(IO3)3, Fe(IO3)3 and Ga(IO3)3 and crystallises in space group P63 (no. 173) with a = 9.541(1) A and c = 5.266(1) A. Structural relationships among the anhydrous non-centrosymmetric metallic Iodates M(IO3)3 (M = Cr, Fe, In, Ga), M(IO3)2 (M = Mg, Mn, Co, Ni, Zn) and α-LiIO3 are described. Structural analogies between these metallic Iodates allow us to prepare solid solutions as In1−xFex(IO3)3 and In1−xCrx(IO3)3. Luminescence of the In1−xCrx(IO3)3 phases has been observed. DSC analyses of β-In(IO3)3 and Ga(IO3)3 show that they decompose at 535 °C and 525 °C respectively. Fe(IO3)3, Ga(IO3)3 and α-In(IO3)3 generate second harmonics and have high non-linear coefficients and high optical damage thresholds in powder form. Furthermore, they do not absorb up to 12 µm. Consequently, they possess a large domain of transparency from visible light to the beginning of the far-infrared, including three atmospheric transparency windows. They are particularly interesting for potential applications in quadratic non-linear optics in atmospheric transparency bands II and III.
-
new potential materials for infrared nonlinear optics preparation characterisation and optical transparency of monometallic and bimetallic Iodates
Solid State Sciences, 2006Co-Authors: Delphine Phanon, Alain Mosset, Bachir Bentria, Djarnal Benbertal, Isabelle GautierluneauAbstract:Abstract The non-centrosymmetric compounds Mg(IO3)2, Mn(IO3)2, Co(IO3)2 and Zn(IO3)2 are isostructural and crystallise in space-group type P 2 1 with a pseudo-hexagonal lattice leading to the formation of a three-individual twin by pseudo-merohedry. Because of this structural analogy, solid solutions are possible between these metallic Iodates. Bimetallic Iodates Mn1−xZnx(IO3)2 form a solid solution over the entire domain of composition. Second harmonic generation test and absorption studies carried out on theses materials show high nonlinear activities, high damage thresholds and are transparent up to 12 μm in the IR.
-
crystal structure of m io3 2 metal Iodates twinned bypseudo merohedry with mii mgii mnii coii niii and znii
Zeitschrift Fur Kristallographie, 2006Co-Authors: Delphine Phanon, Alain Mosset, Bachir Bentria, Erwann Jeanneau, Djamal Benbertal, Isabelle GautierluneauAbstract:The non-centrosymmetric materials Zn(IO 3 ) 2 , Mn(IO 3 ) 2 , Co(IO 3 ) 2 , Mg(IO 3 ) 2 and β-Ni(IO 3 ) 2 have been synthesised by evaporation of nitric acid solutions of metal salts and lithium iodate. All these compounds are isostructural and their structures were characterised both by X-ray diffraction on powder and single crystals. They crystallise in the monoclinic crystal system, space-group type P2 1 (no. 4) with a pseudo-hexagonal lattice, as shown by the lattice parameters of Mn(IO 3 ) 2 for example: a = 11.247(1) A, b = 5.045(1) A, c = 11.246(1) A, β = 120.02(1)°, V = 552.5(1) A 3 , Z = 4. This monoclinic symmetry with a ∼ c and β ∼ 120° leads to a three-individual pseudo-hexagonal twin by pseudo-merohedry. The structure reveals a three-dimensional network in which each octahedrally coordinated cation is linked to ten others via iodate bridges. All these metal Iodates generate second harmonics.
