Phase relationships in the SmBaCuO system at ∼950°C

A systematic X-ray powder diffraction study of the Sm 2O 3BaCO 3CuO system over the temperature range ∼920–980°C is presented as a function of cationic molar ratios. In the pseudobinary regions the phases BaSm 2O 4, Sm 2CuO 4, and BaCuO 2 were observed; in the pseudoternary region Sm 2BaCuO 5, SmB...

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Bibliographic Details
Published in:Journal of solid state chemistry 1991, Vol.90 (1), p.69-78
Main Authors: Czerwonka, J., Eick, H.A.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
Crystallographic aspects of phase transformations
pressure effects
Exact sciences and technology
Physics
Structure of solids and liquids
crystallography
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Summary:A systematic X-ray powder diffraction study of the Sm 2O 3BaCO 3CuO system over the temperature range ∼920–980°C is presented as a function of cationic molar ratios. In the pseudobinary regions the phases BaSm 2O 4, Sm 2CuO 4, and BaCuO 2 were observed; in the pseudoternary region Sm 2BaCuO 5, SmBa 3Cu 2O z , Sm 3Ba 3Cu 6O y , and SmBa 2Cu 3O y were identified. A solid solution region was found in the vicinity of SmBa 2Cu 3O y . Lattice parameters are presented for each compound detected. A pseudoternary phase diagram is presented: subsolidus relationships are indicated. This system is compared with related lanthanoid-barium-copper oxide systems; only the europium system exhibits comparable phases.
ISSN:0022-4596
1095-726X
DOI:10.1016/0022-4596(91)90173-F