Crystal structure of the new barium borate Ba5(BO3)2(B2O5)

Autor:	A. E. Kokh, V. N. Molchanov, N. G. Furmanova, Pavel P. Fedorov, N. G. Kononova, B. A. Maksimov
Rok vydání:	2006
Předmět:	Flux method Materials science chemistry.chemical_element Barium General Chemistry Crystal structure Condensed Matter Physics Barium borate law.invention chemistry.chemical_compound Crystallography Planar chemistry law General Materials Science Orthorhombic crystal system Crystallization
Zdroj:	Crystallography Reports. 51:219-224
ISSN:	1562-689X 1063-7745
DOI:	10.1134/s1063774506020076
Popis:	The crystal structure of the new barium borate Ba5(BO3)2(B2O5) is established (R = 0.0436). Single crystals were grown by spontaneous crystallization in the BaO-B2O3-Na2O system using the flux method. This compound crystallizes in the orthorhombic system, sp. gr. P212121; the unit-cell parameters are a = 9.590(2) A, b = 16.659(3) A, c = 22.919(6) A, and Z = 12. The structure consists of coordination polyhedra of barium cations and the anionic groups [BO3] (planar triangles) and [B2O5] (vertex-sharing double [BO3] triangles), which form a pseudohexagonal framework. Melting of barium borate occurs by a peritectic reaction at 1170 ± 10°C.
Databáze:	OpenAIRE
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