Skip to content
Licensed Unlicensed Requires Authentication Published by De Gruyter (O) July 28, 2010

Substitutional disorder in the system Mg1 − xCu2 + xO3: Cu2+ in a compressed octahedral environment

Abstract

In the system Mg1 − xCu2 + xO3 the phase with x = 0, i.e. the compound MgCu2O3, does not exist. Neutron powder measurements and single crystal X-ray studies clearly show that the Mg lattice site is partially occupied by Cu2+ ions with typical values of x = 0.1. This substitutional disorder, best denoted by the formula (Mg1 − xCux)Cu2O3, is surprising, since the coordination polyhedron of the Mg site is a compressed oxygen octahedron, while the Jahn-Teller ion Cu2+ usually prefers a tetragonally elongated oxygen octahedron, as it exists on the regular Cu site of the lattice. The local environment of the Cu2+ ions on the Mg site was also checked by electron paramagnetic resonance (EPR) measurements.

Published Online: 2010-7-28
Published in Print: 1994-11-1

© 2015 Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München

Downloaded on 19.3.2024 from https://www.degruyter.com/document/doi/10.1524/zkri.1994.209.11.870/html
Scroll to top button