Citation:
WANG Xiao-Shan, LIU Li-Juan, XIA Ming-Jun, WANG Xiao-Yang, CHEN Chuang-Tian. Two Isostructural Multi-metal Borates: Syntheses, Crystal Structures and Characterizations of M3LiNa4Be4B10O24F (M=Sr, Cd)[J]. Chinese Journal of Structural Chemistry,
2016, 34(10): 1617-1625.
doi:
10.14102/j.cnki.0254-5861.2011-0713
Two Isostructural Multi-metal Borates: Syntheses, Crystal Structures and Characterizations of M3LiNa4Be4B10O24F (M=Sr, Cd)
摘要:
Two new isostructural multi-metal beryllium borates, M3LiNa4Be4B10O24F (M=Sr (1), Cd (2)), have been synthesized by spontaneous crystallization. The structures were verified by single-crystal X-ray crystallography. The compounds crystallize in the trigonal space group R3, with a=b=9.4645(1) Å, c=38.842(8) Å, V=3013.2(6) Å3, Z=6, F(000)=2568, Dc=3.005 g/cm3, Mr=908.9, R=0.0327, wR=0.0678, μ=8.160 mm-1 for Sr3LiNa4Be4B10O24F and a=b=9.3019(8) Å, c=37.782(7) Å, V=2831.12(9) Å3, Z=6, F(000)=2748, Dc=3.459 g/cm3, Mr=983.24, R=0.0158, wR=0.0455, μ=3.586 mm-1 for Cd3LiNa4Be4B10O24F. The structures are characterized by an infinite two-dimensional [Be8B16O40F2]∞ double layer bridged by [B12O24] groups like a sandwich structure, while the cations reside in tunnels along different directions. UV-vis-IR diffuse reflectance spectroscopy demonstrates that their cut-off edges are below 200 nm. Thermal analysis shows that they melt incongruently and their melting points are around 740~770 ℃.
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关键词:
- borates
- / [B12O24] group
- / optical material
- / sandwich structure
- / multi-metal;
English
Two Isostructural Multi-metal Borates: Syntheses, Crystal Structures and Characterizations of M3LiNa4Be4B10O24F (M=Sr, Cd)
Abstract:
Two new isostructural multi-metal beryllium borates, M3LiNa4Be4B10O24F (M=Sr (1), Cd (2)), have been synthesized by spontaneous crystallization. The structures were verified by single-crystal X-ray crystallography. The compounds crystallize in the trigonal space group R3, with a=b=9.4645(1) Å, c=38.842(8) Å, V=3013.2(6) Å3, Z=6, F(000)=2568, Dc=3.005 g/cm3, Mr=908.9, R=0.0327, wR=0.0678, μ=8.160 mm-1 for Sr3LiNa4Be4B10O24F and a=b=9.3019(8) Å, c=37.782(7) Å, V=2831.12(9) Å3, Z=6, F(000)=2748, Dc=3.459 g/cm3, Mr=983.24, R=0.0158, wR=0.0455, μ=3.586 mm-1 for Cd3LiNa4Be4B10O24F. The structures are characterized by an infinite two-dimensional [Be8B16O40F2]∞ double layer bridged by [B12O24] groups like a sandwich structure, while the cations reside in tunnels along different directions. UV-vis-IR diffuse reflectance spectroscopy demonstrates that their cut-off edges are below 200 nm. Thermal analysis shows that they melt incongruently and their melting points are around 740~770 ℃.
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Key words:
- borates
- / [B12O24] group
- / optical material
- / sandwich structure
- / multi-metal;
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