Crystallographic description of phases in the Y-Ba-Cu-O superconductor

R. M. Hazen, L. W. Finger, R. J. Angel, C. T. Prewitt, N. L. Ross, H. K. Mao, C. G. Hadidiacos, P. H. Hor, R. L. Meng, C. W. Chu

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282 Citations (Scopus)


Single-crystal x-ray techniques were used to determine two structures that comprise the Y-Ba-Cu-O superconductor. A green phase has the orthorhombic Y2BaCuO5 structure. An opaque phase (YBa2Cu3O6+x, 0x1.0) is tetragonal (a=3.859 A, c=11.71 A; space group P4m2;Z=1). The structure is related to a 1:1:3 ABO3 perovskite: Ba and Y order in A sites and Cu is in B sites. Systematic oxygen vacancies between adjacent copper atoms lead to a fivefold-coordinate Cu in proximity to Y and a twofold-coordinate Cu in the vicinity of the Ba site.

Original languageEnglish
Pages (from-to)7238-7241
Number of pages4
JournalPhysical Review B
Issue number13
Publication statusPublished - 1987

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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