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Crystal structure of BaMn(2)(AsO(4))(2) containing discrete [Mn(4)O(18)](28−) units

In our attempt to search for mixed alkaline-earth and transition metal arsenates, the title compound, barium dimanganese(II) bis­(arsenate), has been synthesized by employing a high-temperature RbCl flux. The crystal structure of BaMn(2)(AsO(4))(2) is made up of MnO(6) octa­hedra and AsO(4) tetra­he...

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Detalles Bibliográficos
Autores principales: Alcantar, Salvador, Ledbetter, Hollis R., Ranmohotti, Kulugammana G. S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5730239/
https://www.ncbi.nlm.nih.gov/pubmed/29250402
http://dx.doi.org/10.1107/S2056989017016152
Descripción
Sumario:In our attempt to search for mixed alkaline-earth and transition metal arsenates, the title compound, barium dimanganese(II) bis­(arsenate), has been synthesized by employing a high-temperature RbCl flux. The crystal structure of BaMn(2)(AsO(4))(2) is made up of MnO(6) octa­hedra and AsO(4) tetra­hedra assembled by sharing corners and edges into infinite slabs with composition [Mn(2)(AsO(4))(2)](2−) that extend parallel to the ab plane. The barium cations reside between parallel slabs maintaining the inter­slab connectivity through coordination to eight oxygen anions. The layered anionic framework comprises weakly inter­acting [Mn(4)O(18)](28−) tetra­meric units. In each tetra­mer, the manganese(II) cations are in a planar arrangement related by a center of inversion. Within the slabs, the tetra­meric units are separated from each other by 6.614 (2) Å (Mn⋯Mn distances). The title compound has isostructural analogues amongst synthetic SrM (2)(XO(4))(2) compounds with M = Ni, Co, and X = As, P.