The crystal structures of Th{sub 4}Fe{sub 17}P{sub 10}O{sub 1-x} and ThFe{sub 5}P{sub 3}
- Universitaet Muenster (Germany)
The new compounds Th{sub 4}Fe{sub 17}P{sub 10}O{sub 1-x} and ThFe{sub 5}P{sub 3} were prepared in well-crystallized form using a tin flux. Their crystal structures were determined from single-crystal X-ray data. Th{sub 4}Fe{sub 17}P{sub 10}O{sub 1-x} (x = 0.36(3)) is monoclinic: C2/m, a = 2464.8(6) pm, b = 377.3(1) pm, c = 930.3(2) pm, {beta} = 91.25(3){degrees}, Z = 2, R = 0.024. ThFe{sub 5}P{sub 3} has a YCo{sub 5}P{sub 3}-type structure: Pnma, a = 1210.8(2) pm, b = 376.7(1) pm, c = 1058.1(4) pm, Z = 4, R = 0.024. The compounds belong to a large family of structures with a metal:nonmetal ratio of exactly or nearly 2:1. In these structures all phosphorus atoms are surrounded by six metal atoms forming a trigonal prism with three additional metal atoms capping the rectangular faces of the prism. The iron atoms in Th{sub 4}Fe{sub 17}P{sub 10}O{sub 1-x} and ThFe{sub 5}P{sub 3} have tetrahedral and square-pyramidal phosphorus coordination. One iron atom of Th{sub 4}Fe{sub 17}P{sub 10}O{sub 1-x} is situated in a rectangle of phosphorus atoms. Both compounds have numerous iron-iron bonds with distances as short as 238 pm. The oxygen atoms of Th{sub 4}Fe{sub 17}P{sub 10}O{sub 1-x} are octahedrally coordinated by four thorium and two iron atoms.
- OSTI ID:
- 171916
- Journal Information:
- Journal of Solid State Chemistry, Vol. 117, Issue 1; Other Information: PBD: Jun 1995
- Country of Publication:
- United States
- Language:
- English
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