Synthesis, crystal structure and charge-distribution validation of a new alluaudite-type phosphate, Na2.22Mn0.87In1.68(PO4)3
| Autor: | M. Luisa López, Abdessalem Badri, Inmaculada Álvarez-Serrano, M. Ben Amara |
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| Rok vydání: | 2020 |
| Předmět: |
crystal structure
Flux method Chemistry Coordination number chemistry.chemical_element Charge density disorder General Chemistry Crystal structure Manganese Type (model theory) 010402 general chemistry 010403 inorganic & nuclear chemistry Condensed Matter Physics 01 natural sciences indium phosphate 0104 chemical sciences lcsh:Chemistry Catenation Crystallography alluaudite structure type lcsh:QD1-999 General Materials Science Indium |
| Zdroj: | Acta Crystallographica Section E: Crystallographic Communications, Vol 76, Iss 8, Pp 1369-1372 (2020) |
| ISSN: | 2056-9890 |
| DOI: | 10.1107/s2056989020010191 |
| Popis: | Na2.22Mn0.87In1.68(PO4)3, sodium manganese indium tris(phosphate) (2.22/0.87/1.68), was obtained in the form of single crystals by a flux method and was structurally characterized by single-crystal X-ray diffraction. The compound belongs to the alluaudite structure type (space group C2/c) with general formula X(2)X(1)M(1)M(2)2(PO4)3. The X(2) and X(1) sites are partially occupied by sodium [occupancy 0.7676 (17) and 1/2] while the M(1) and M(2) sites are fully occupied within a mixed distribution of sodium/manganese(II) and manganese(II)/indium, respectively. The three-dimensional anionic framework is built up on the basis of M(2)2O10 dimers that share opposite edges with M(1)O6 octahedra, thus forming infinite chains extending parallel to [10\overline{1}]. The linkage between these chains is ensured by PO4 tetrahedra through common vertices. The three-dimensional network thus constructed delimits two types of hexagonal channels, resulting from the catenation of M(2)2O10 dimers, M(1)O6 octahedra and PO4 tetrahedra through edge- and corner-sharing. The channels are occupied by Na+ cations with coordination numbers of seven and eight. |
| Databáze: | OpenAIRE |
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