Sr10[(PO4)5.5(BO4)0.5](BO2): Growth and crystal structure of a strontium phosphate orthoborate metaborate closely related to the apatite-type crystal structure期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Sr₁₀[(PO₄)_5.5(BO₄)_0.5](BO₂): Growth and crystal structure of a strontium phosphate orthoborate metaborate closely related to the apatite-type crystal structure

Authors:	Shuang Chen Stefan Hoffmann Lev G Akselrud Ulrich Schwarz Rüdiger Kniep

Institution:	^a Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany ^b State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, PR China ^c Graduate School of the Chinese Academy of Sciences, Beijing 100049, PR China ^d Department of Inorganic Chemistry, Lviv State University, UA-79602 Lviv, Ukraine

Abstract:	Single crystals of the strontium phosphate orthoborate metaborate, Sr₁₀(PO₄)_5.5(BO₄)_0.5](BO₂), were grown from the melt and investigated by X-ray diffraction (space group , No. 147; a=9.7973(8) Å, c=7.3056(8) Å, V=607.29(10) Å³, Z=1). The crystal structure is closely related to apatite and contains linear metaborate groups, BO₂]⁻ (point group D_∞h, B-O=1.284(11) Å) taking positions within the channels running along the three-fold inversion axis. Strontium sites are found to be fully occupied while PO₄]³⁻ tetrahedra are partially replaced by BO₄]⁵⁻ groups.

Keywords:	Apatite Borate Metaborate Strontium Crystal structure
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