Structural Phase Diagram and Superconducting Behavior of the Ba 1-X k x bio 3 System

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STRUCTURAL PHASE DIAGRAM AND SUPERCONDUCTING BEHAVIOR OF THE Bal.xKxBiO3 SYSTEM J. D. JORGENSEN, SHIYOU PEI, D. G. HINKS, B. DABROWSKI, D. R. RICHARDS, A. W. MITCHELL, Y. ZHENG, AND D. T. MARX Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 and S. K. SINHA*, J. M. NEWSAM, D. VAKNIN**, AND A. J. JACOBSON Corporate Research Laboratories, Exxon Research and Engineering Co., Annandale, NJ 08801 *and Physics Department, Brookhaven National Laboratory, Upton, NY 11973 **and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, PA 19104 ABSTRACT We have determined the crystal structures of five phases in the Bal-xKxBiO3 system for 0•_x