Published April 1993
| Version v1
Journal article
Structural disorder in YSr2Cu2CoO7 and substituted variants
- 1. Univ. of Birmingham (United Kingdom)
Description
The phase YSr2Cu2CoO7 (orthorhombic, Ima2) is structurally related to YSr2Cu2GaO7, but has a component of disorder associated with the oxygen sublattice. Substitutions of small amounts of Ba for Sr, or Cu for Co, have been studied, and shown by powder diffraction methods to increase the level of disorder. YSr1.8Ba0.2Cu2CoO7 and YSr2Cu2.25Co0.75O7, for example, have been shown by neutron diffraction to have tetragonal symmetry (P4/mmm), which appears related to significant displacements of some of the oxygen ions. The nature of the disorder in the parent phase is discussed and compared with the structural observations on substituted derivatives. 17 refs., 6 figs., 5 tabs
Additional details
Publishing Information
- Journal Title
- Journal of Solid State Chemistry
- Journal Volume
- 103
- Journal Issue
- 2
- Journal Page Range
- p. 472-480.
- ISSN
- 0022-4596
- CODEN
- JSSCBI
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 25002252
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BARIUM OXIDES; COBALT OXIDES; COPPER OXIDES; CRYSTAL DEFECTS; IONS; NEUTRON DIFFRACTION; ORTHORHOMBIC LATTICES; OXYGEN IONS; STRONTIUM OXIDES; SYMMETRY; TETRAGONAL LATTICES; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; COBALT COMPOUNDS; COHERENT SCATTERING; COPPER COMPOUNDS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIFFRACTION; OXIDES; OXYGEN COMPOUNDS; SCATTERING; STRONTIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS