SYNTHESIS, CHARACTERIZATION AND POLYMORPHISM OF NEW R2BACOO5 OXIDES (R = DY-LU)

Authors
SAEZPUCHE R HERNANDEZVELASCO J FERNANDEZ F
Citation
R. Saezpuche et al., SYNTHESIS, CHARACTERIZATION AND POLYMORPHISM OF NEW R2BACOO5 OXIDES (R = DY-LU), Solid state ionics, 63-5, 1993, pp. 922-926
Citations number
12
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical
Journal title
Solid state ionics → ACNP
ISSN journal
01672738
Volume
63-5
Year of publication
1993
Pages
922 - 926
Database
ISI
SICI code
0167-2738(1993)63-5:<922:SCAPON>2.0.ZU;2-T
Abstract
The Dy2BaCoO5 oxide, previously described as belonging to the Nd2BaNiO 5 structural type, is actually a dimorphic compound. The new high temp erature (HT) phase, HT-Dy2BaCoO5, crystallizes with the Sm2BaCuO5-type , space group Pnma, which lattice parameters are: a=12.3375(4) angstro m, b=5.7250(2) angstrom and c=7.0880 (2) angstrom. Dimorphism has been also detected for R2BaCoO5 (R=Dy-Tm) and new Pnma-R2BaCoO5 (R=Dy, Er, Tm and Lu) phases have been characterized by means of X-ray powder di ffraction.