Author： Borel M.M. Leclaire A. Chardon J. Michel C. Provost J. Raveau B.
Publisher： Academic Press
ISSN： 0022-4596
Source： Journal of Solid State Chemistry, Vol.135, Iss.2, 1998-02, pp. : 302-306
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Abstract
A new mixed-valence vanadium monophosphate with a chain-like structure has been synthesized. It crystallizes in the P2 1 2 1 2 1 space group with a=5.137(1), b=12.418(1), and c=20.724(3) A. The structure consists of [V 2 P 3 O 15 ] [infinity] ribbons running along a, whose cohesion is ensured by Ba2+ cations. Each ribbon is built from two sorts of chains:[VPO 7 ] [infinity] chains, which consist of corner-sharing VO 5 trigonal bipyramids and PO 4 tetrahedra, and [VP 2 O 10 ] [infinity] chains built of VO 6 octahedra and PO 4 tetrahedra. The vanadium-centered polyhedra are linked together by corner-sharing, so that V 2 O 10 units are formed. Charge ordering is observed on the vanadium species, with V(IV) in the octahedron and V(V) in the bipyramid. Copyright 1998 Academic Press.
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