NIOBIUM PHOSPHATE BRONZES — STRUCTURAL RELATIONSHIPS WITH PURE OCTAHEDRAL OXYGEN TUNGSTEN BRONZES

Author:

RAVEAU B.1,BOREL M.M.1,LECLAIRE A.1,GRANDIN A.1

Affiliation:

1. Laboratoire CRISMAT — CNRS URA 1318 — ISMRA/Université de Caen, Boulevard du Marechal Juin, 14050 CAEN CEDEX, France

Abstract

The phosphate niobium bronzes form a large family of structures characterized by pentagonal or hexagonal tunnels. The host lattices of these oxides, involving a mixed valency of niobium Nb(V)-Nb(IV) are described here. The close relationships with pure octahedral structures, mainly perovskites, hexagonal tungsten bronzes (HTB) and tetragonal tungsten bronzes (TTB), and K 3 Nb 8 O 21 are studied.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

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