A New Lanthanum and Calcium Borate La2CaB10O19

A new lanthanum calcium borate with the composition La2CaB10O19 has been synthesized. Single crystals have been grown from a melt close to the stoichiometric composition. The compound crystallizes in the monoclinic system, space group C2, with a = 11.043(3) Å, b = 6.563(2) Å, c = 9.129(2) Å, α = γ =...

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Bibliographic Details
Published in:Chemistry of materials 2001-03, Vol.13 (3), p.753-755
Main Authors: Wu, Yicheng, Liu, Jianguo, Fu, Peizhen, Wang, Junxing, Zhou, Huyun, Wang, Guofu, Chen, Chuangtian
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Inorganic compounds
Physics
Salts
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
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Summary:A new lanthanum calcium borate with the composition La2CaB10O19 has been synthesized. Single crystals have been grown from a melt close to the stoichiometric composition. The compound crystallizes in the monoclinic system, space group C2, with a = 11.043(3) Å, b = 6.563(2) Å, c = 9.129(2) Å, α = γ = 90°, β = 91.47°, and two formula units per cell. The crystal structure contains B5O12 double-ring pentaborate groups, which are linked together to form an infinite two-dimensional double layer. The layer runs almost perpendicular to the c axis of the crystal. The La atoms are located in layers, while the Ca atoms are located between two layers. La2CaB10O19 exhibits an optical second-harmonic generation effect about twice as large as that of KDP (KH2PO4).
ISSN:0897-4756
1520-5002
DOI:10.1021/cm0003119