Crystal structure of the high-Tc superconductor Ba2YCu3O9-

T. Siegrist, S. Sunshine, D. W. Murphy, R. J. Cava, S. M. Zahurak

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The crystal structure of the high-Tc superconducting phase Ba2YCu3O9-(=2.0) has been determined by single-crystal x-ray diffraction. The compound crystallizes in an orthorhombic, oxygen-deficient perovskite superstructure with space group Pmmm, a=3.856(2) A b=3.870(2) A, and c=11.666(3) A. The ordering of Ba and Y in a [Ba-Y-Ba] sequence along the c axis is responsible for the tripled cell. Two [CuO2] planes with copper in distorted square planar coordination are the key to conductivity.

Original languageEnglish (US)
Pages (from-to)7137-7139
Number of pages3
JournalPhysical Review B
Issue number13
StatePublished - 1987
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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