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The solid solution K3.84Ni0.78Fe3.19(PO4)5.

ABSTRACT: The title compound, tetra-potassium tetra-[nickel(II)/iron(III)] penta-kis-(orthophosphate), K3.84Ni0.78Fe3.19(PO4)5, has been obtained from a flux. The structure is isotypic with that of K4MgFe3(PO4)5. The three-dimensional framework is built up from (Ni/Fe)O5 trigonal bipyramids with a mixed Fe:Ni occupancy of 0.799?(8):0.196?(10) and isolated PO4 tetra-hedra, one of which is on a general position and one of which has -4.. site symmetry. Two K(+) cations are statistically occupied and are distributed over two positions in hexa-gonally shaped channels that run parallel to [001]. One K(+) cation [occupancy 0.73?(3)] is surrounded by nine O atoms, while the other K(+) cation [occupancy 0.23?(3)] is surrounded by eight O atoms.

SUBMITTER: Strutynska NY

PROVIDER: S-EPMC4120600 | biostudies-literature | 2014 Jul

REPOSITORIES: biostudies-literature

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The solid solution K3.84Ni0.78Fe3.19(PO4)5.

Strutynska Nataliia Yu NY Ogorodnyk Ivan V IV Livitska Oksana V OV Baumer Vyacheslav N VN Slobodyanik Nikolay S NS

Acta crystallographica. Section E, Structure reports online 20140614 Pt 7

The title compound, tetra-potassium tetra-[nickel(II)/iron(III)] penta-kis-(orthophosphate), K3.84Ni0.78Fe3.19(PO4)5, has been obtained from a flux. The structure is isotypic with that of K4MgFe3(PO4)5. The three-dimensional framework is built up from (Ni/Fe)O5 trigonal bipyramids with a mixed Fe:Ni occupancy of 0.799 (8):0.196 (10) and isolated PO4 tetra-hedra, one of which is on a general position and one of which has -4.. site symmetry. Two K(+) cations are statistically occupied and are dist ...[more]

PMID: 25161510

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