Crystal structure of a Ba-Y-Cu-O superconductor as revealed by Rietveld analysis of X ray powder diffraction data

Crystal structure of a Ba-Y-Cu-O superconductor as revealed by Rietveld analysis of X ray powder diffraction data

The crystal structure of a Ba-Y-Cu-O superconductor was refined by the Rietveld analysis of X-ray powder diffraction data. This material is orthorhombic with lattice parameters a = 3.8845 Å, b = 3.8293 Å, and c = 11.6926 Å. Possible space groups are P222, Pmm2, and Pmmm. Metal atoms have essentially...

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Veröffentlicht in:Japanese Journal of Applied Physics 1987-05, Vol.26 (5), p.611-612
Hauptverfasser: IZUMI, F, ASANO, H, ISHIGAKI, T, ONO, H, OKAMURA, F. P
Format: Artikel
Sprache:eng
Schlagworte:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Inorganic compounds
Physics
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
Water, oxides, hydroxides, peroxides
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Zusammenfassung:The crystal structure of a Ba-Y-Cu-O superconductor was refined by the Rietveld analysis of X-ray powder diffraction data. This material is orthorhombic with lattice parameters a = 3.8845 Å, b = 3.8293 Å, and c = 11.6926 Å. Possible space groups are P222, Pmm2, and Pmmm. Metal atoms have essentially the same configuration as that in the perovskite-type structure. A structural model is proposed in which an oxygen atom at (0, 0, 1/2) is deficient.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.26.l611