CRYSTAL-STRUCTURE OF THE SUPERCONDUCTOR CA2SR2CU3GAO9 PREPARED AT HIGH-PRESSURE

Authors
KHASANOVA NR IZUMI F TAKAYAMAMUROMACHI E HEWAT AW
Citation
Nr. Khasanova et al., CRYSTAL-STRUCTURE OF THE SUPERCONDUCTOR CA2SR2CU3GAO9 PREPARED AT HIGH-PRESSURE, Physica. C, Superconductivity, 263(1-4), 1996, pp. 200-203
Citations number
9
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
263
Issue
1-4
Year of publication
1996
Pages
200 - 203
Database
ISI
SICI code
0921-4534(1996)263:1-4<200:COTSCP>2.0.ZU;2-V
Abstract
Structure parameters of Ca2Sr2Cu3GaO9 prepared at 6 GPa and 1250 degre es C were refined with neutron powder diffraction data on the basis of Ima2, Imcm and P2(1)ab space groups. In its structure, (GaO33-)(infin ity) chains consisting of GaO4 tetrahedra form Sr2GaO3 blocks, which a lternate with (Ca)(2)(CuO2)(3) sheets. Imcm gave the best approximatio n to the actual superstructure due to alternate alignment of two (GaO3 3-)(infinity) chains with different orientation of GaO4 tetrahedra.