A new oxychloride, Ba2CuO2Cl2, prepared under high pressure

作者：Tatsuki T^*; TokiwaYamamoto A; Tamura T; Moriwaki Y; Wu XJ; Adachi S; Tanabe K

来源：Physica C-Superconductivity and Its Applications, 1996, 265(3-4): 323-327.

DOI：10.1016/0921-4534(96)00332-2

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 Ba2CuO2Cl2 crystallizes in a tetragonal K2NiF4 structure with lattice parameters of a = 4.1026(3) Angstrom and c = 16.442(1) Angstrom. It was found from iodometric titration and SEM-EDX analysis that the average valence of the Cu ions is +1.8 and 10% chlorine is deficient.

• 出版日期1996-7-10