PREPARATION AND CHARACTERIZATION OF NEW 1-2-1-2 COMPOUNDS MA2RECU2O8-DELTA AND NB1-XRUXSR2RECU2O8-DELTA (M=NB OR TA, A=BA OR SR, AND RE=PR OR SM)

Authors
HELLEBRAND B WANG XZ STEGER PL
Citation
B. Hellebrand et al., PREPARATION AND CHARACTERIZATION OF NEW 1-2-1-2 COMPOUNDS MA2RECU2O8-DELTA AND NB1-XRUXSR2RECU2O8-DELTA (M=NB OR TA, A=BA OR SR, AND RE=PR OR SM), Journal of solid state chemistry, 110(1), 1994, pp. 32-35
Citations number
11
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Physical
Journal title
Journal of solid state chemistry → ACNP
ISSN journal
00224596
Volume
110
Issue
1
Year of publication
1994
Pages
32 - 35
Database
ISI
SICI code
0022-4596(1994)110:1<32:PACON1>2.0.ZU;2-U
Abstract
New compounds MA2RECu2O8-delta (M = Nb or Ta, A = Ba or Sr, and RE = P r or Sm) have been prepared and characterized. Structural analysis rev ealed that they crystallize in a 1-2-1-2 TaBa2LaCu2O8-delta structure type similar to that of YBa2Cu3O7. Cations such as Nb3+, Ta5+, and Ru4 + are accommodated in the basal plane and the double CuO2 pyramidal pl anes are maintained. All the compounds show semiconducting behavior. W ith Ru substitution the formal copper valence increases from +2 to abo ut +2.14. (C) 1994 Academic Press, Inc.