CRYSTAL-CHEMISTRY OF LN'LN''BA2CU2TI2O11 (LN=LANTHANIDE,Y) MATERIALS

Authors
GREENWOOD KB SARJEANT GM POEPPELMEIER KR SALVADOR PA MASON TO DABROWSKI B ROGACKI K CHEN Z
Citation
Kb. Greenwood et al., CRYSTAL-CHEMISTRY OF LN'LN''BA2CU2TI2O11 (LN=LANTHANIDE,Y) MATERIALS, Chemistry of materials, 7(7), 1995, pp. 1355-1360
Citations number
22
Categorie Soggetti
Chemistry Physical","Material Science
Journal title
Chemistry of materials → ACNP
ISSN journal
08974756
Volume
7
Issue
7
Year of publication
1995
Pages
1355 - 1360
Database
ISI
SICI code
0897-4756(1995)7:7<1355:COL(M>2.0.ZU;2-W
Abstract
The stabilization of the quadruple perovskite structure Ln(2)Ba(2)Cu(2 )Ti(2)O(1)1 as a function of the constituent lanthanides has been inve stigated. Powder X-ray data show that the mixed A-site compositions Ln 'Ln '' Ba2Cu2Ti2O11 (Ln'Ln '' = LaY, LaHo, LaEr, and NdDy) concertedly order to form distinct CuO22- and TiO2 double layers. In addition the A cations (Ln, Ln '', and Ba) order on three distinct sites, with the smaller lanthanide (Ln '') occupying the 8-coordinate site between co ntracted copper-oxygen planes.