Acta Crystallographica Section E
Volume 58, Issue 8 pp. i70-i71

Samarium orthosilicate oxy­apatite, Sm5(SiO4)3O

Mark G. Morgan, 

Mark G. Morgan

Department of Chemistry, University of Alberta, Edmonton, AB, Canada T6G 2G2

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Meitian Wang, 

Meitian Wang

Department of Chemistry, University of Alberta, Edmonton, AB, Canada T6G 2G2

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Arthur Mar, 

Arthur Mar

Department of Chemistry, University of Alberta, Edmonton, AB, Canada T6G 2G2

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First published: 29 July 2004
https://doi.org/10.1107/S1600536802011868
Citations: 1
Arthur Mar, e-mail: [email protected]

Abstract

Samarium orthosilicate oxy­apatite, Sm5(SiO4)3O, contains SiO44− tetrahedra [Si—O 1.611 (7)–1.629 (5) Å] and O2− anions, separated by samarium cations in CN7 [Sm—O 2.2428 (4)–2.641 (7) Å] and CN9 sites [Sm—O 2.428 (5)–2.846 (5) Å]. The full occupancy of the samarium sites implies a mixed valency of four Sm3+ and one Sm2+ per formula unit.

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