A NEW OXYCHLORIDE, BA2CUO2CL2, PREPARED UNDER HIGH-PRESSURE

Authors
TATSUKI T TOKIWAYAMAMOTO A TAMURA T MORIWAKI Y WU XJ ADACHI S TANABE K
Citation
T. Tatsuki et al., A NEW OXYCHLORIDE, BA2CUO2CL2, PREPARED UNDER HIGH-PRESSURE, Physica. C, Superconductivity, 265(3-4), 1996, pp. 323-327
Citations number
25
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
265
Issue
3-4
Year of publication
1996
Pages
323 - 327
Database
ISI
SICI code
0921-4534(1996)265:3-4<323:ANOBPU>2.0.ZU;2-D
Abstract
We synthesized a new copper-oxychloride, Ba2CuO2Cl2, from BaCl2, BaO2 and Cu-metal powders under a high pressure of 6 GPa at 1000 degrees C. X-ray powder diffraction and TEM observation indicated that Ba2CuO2Cl 2 crystallizes in a tetragonal K2NiF4 structure with lattice parameter s of a = 4.1026(3) Angstrom and c = 16.442(1) Angstrom. It was found f rom iodometric titration and SEM-EDX analysis that the average valence of the Cu ions is +1.8 and 10% chlorine is deficient.