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Crystal Structure of DySr2Cu2.7Mo0.3O7.2and DySr2Cu2.7Cr0.3O7.2Analogues of the 123 YBCO Phase

✍ Scribed by J.A. Sokołowski; W. Łasocha; S.A. Hodorowicz

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
316 KB
Volume
141
Category
Article
ISSN
0022-4596

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✦ Synopsis

The crystal structure of DySr2Cu2.7Mo0.3O7.2 and DySr2Cu2.7Cr0.3O7.2 was solved by the X-ray powder diffraction method. The space group of DySr2Cu2.7Mo0.3O7.2 (Mr ‫؍‬ 653.29) is P4/mmm, with lattice parameters a ‫؍‬ 3.8262(1) A s , c ‫؍‬ 11.5492(2) A s , and Z ‫؍‬ 1. The space group of DySr2Cu2.7Cr0.3O7.2 (Mr ‫؍‬ 640.11) is P4/mmm, with lattice parameters a ‫؍‬ 3.8531(1) A s , c ‫؍‬ 11.3804(2) A s , and Z ‫؍‬ 1. Rietveld refinement results in the discrepancy factors RB ‫؍‬ 7.93 and Rwp ‫؍‬ 3.76 for the Mo compound and RB ‫؍‬ 9.76 and Rwp ‫؍‬ 4.07 for the Cr compound.

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