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ABSTRACT:
SUBMITTER: Zatovsky IV
PROVIDER: S-EPMC2979107 | biostudies-literature | 2010 Apr
REPOSITORIES: biostudies-literature
Zatovsky Igor V IV Ogorodnyk Ivan V IV Strutynska Nataliya Yu NY Slobodyanik Nikolay S NS Sharkina Nataliya O NO
Acta crystallographica. Section E, Structure reports online 20100424 Pt 5
The title compound, K(0.8)Ca(9.8)Fe(0.2)(PO(4))(7) (potassium deca-calcium iron hepta-phosphate), belongs to the whitlockite family. The structure is built up from several types of metal-oxygen polyhedra: two [CaO(8)], one [CaO(7)] and one [(Ca/Fe)O(6)] polyhedron with a mixed Ca/Fe occupancy in a 0.8:0.2 ratio, as well as three tetra-hedral [PO(4)] units. Of the 18 sites in the asymmetric unit, the site with the mixed Ca/Fe occupation, the K site, one P and one O site are on special positions 6 ...[more]