Ca(4)As(3) – a new binary calcium arsenide

The crystal structure of the binary compound tetra­calcium triarsenide, Ca(4)As(3), was investigated by single-crystal X-ray diffraction. Ca(4)As(3) crystallizes in the Ba(4)P(3) structure type and is thus a homologue of isotypic Sr(4)As(3). The unit cell contains 32 Ca(2+) cations, 16 As(3−) isolat...

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Detalles Bibliográficos
Autores principales: Hoffmann, Andrea V., Hlukhyy, Viktor, Fässler, Thomas F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2015
Materias:
Research Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4719836/
https://www.ncbi.nlm.nih.gov/pubmed/26870427
http://dx.doi.org/10.1107/S2056989015022367
Descripción
Sumario:The crystal structure of the binary compound tetra­calcium triarsenide, Ca(4)As(3), was investigated by single-crystal X-ray diffraction. Ca(4)As(3) crystallizes in the Ba(4)P(3) structure type and is thus a homologue of isotypic Sr(4)As(3). The unit cell contains 32 Ca(2+) cations, 16 As(3−) isolated anions and four centrosymmetric [As(2)](4–) dumbbells. The As atoms in each of the dumbbells are connected by a single bond, thus this calcium arsenide is a Zintl phase.

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