Synthesis and crystal structure of a new calcium borate, CaB6O10 |
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Authors: | Xuean Chen Ming Li Xinan Chang Hegui Zang Weiqiang Xiao |
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Affiliation: | aCollege of Materials Science and Engineering, Beijing University of Technology, Ping Le Yuan 100, Beijing 100022, PR China;bInstitute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100022, PR China |
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Abstract: | A new calcium borate, CaB6O10, has been prepared by solid-state reactions at temperature below 750 °C. The single-crystal X-ray structural analysis showed that CaB6O10 crystallizes in the monoclinic space group P21/c with a = 9.799(1) Å, b = 8.705(1) Å, c = 9.067(1) Å, β = 116.65(1)°, Z = 4. It represents a new structure type in which two B3O7]5− triborate groups are bridged by one oxygen atom to form a B6O13]8− group that is further condensed into a 3D network, with the shorthand notation 6: ∞32 × (3:2Δ + T)]. The 3D network affords intersecting open channels running parallel to three crystallographically axis directions, where Ca2+ cations reside. The IR spectrum further confirms the presence of both BO3 and BO4 groups. |
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Keywords: | CaB6O10 Borate Synthesis Crystal structure |
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