Rietveld Refinement of the Structure of Ba2YCu3O7-x with Neutron Powder Diffraction Data
- 1 May 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (5A), L649
- https://doi.org/10.1143/jjap.26.l649
Abstract
The crystal structure of a high T c superconductor, Ba2YCu3O7-x , has been refined by the Rietveld analysis of TOF neutron powder diffraction data. Two polymorphs of Ba2YCu3O7-x are contained in the sample: orthorhombic (74%) and tetragonal (26%) forms. The two forms have nearly the same structure closely related to that of perovskite-type compounds. In the orthorhombic form, the occupation factor of an oxygen atom on the a axis differed greatly from that on the b axis, which is the main reason why Ba2YCu3O7-x crystallizes in the orthorhombic form.Keywords
This publication has 4 references indexed in Scilit:
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