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Polymorphism of tungsten perovskite compounds Ba/sub 2/SEsub(0. 67)WO/sub 6/

Abstract

The compounds Ba/sub 2/SEsub(0.67)WO/sub 6/ with SE = Gd-Lu are polymorphic. Above 1200/sup 0/C the instable cubic modification (ordered perovskite with 4 formula units Ba/sub 2/SEsub(0.67)vacantsub(0.33)WO/sub 6/ per cell) transforms irreversibly into a hexagonal modification with completely filled cationic lattice. For Ba/sub 2/Eusub(0.67)WO/sub 6/ the transformation is incomplete. With SE = Nd and Sm only the cubic modification is formed.
Authors:
Schittenhelm, H J; Kemmler-Sack, S [1] 
  1. Tuebingen Univ. (F.R. Germany). Inst. fuer Anorganische Chemie
Publication Date:
Sep 01, 1976
Product Type:
Journal Article
Reference Number:
AIX-08-289327; EDB-77-050946
Resource Relation:
Journal Name: Z. Anorg. Allg. Chem.; (German Democratic Republic); Journal Volume: 425:2
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BARIUM COMPOUNDS; CRYSTAL-PHASE TRANSFORMATIONS; DYSPROSIUM COMPOUNDS; ERBIUM COMPOUNDS; EUROPIUM COMPOUNDS; GADOLINIUM COMPOUNDS; HOLMIUM COMPOUNDS; LANTHANUM COMPOUNDS; LUTETIUM COMPOUNDS; NEODYMIUM COMPOUNDS; PRASEODYMIUM COMPOUNDS; SAMARIUM COMPOUNDS; TERBIUM COMPOUNDS; THULIUM COMPOUNDS; TUNGSTEN COMPOUNDS; YTTERBIUM COMPOUNDS; YTTRIUM COMPOUNDS; CHEMICAL PREPARATION; CUBIC LATTICES; DENSITY; HEXAGONAL LATTICES; LATTICE PARAMETERS; PEROVSKITE; STRUCTURAL CHEMICAL ANALYSIS; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CALCIUM OXIDES; CHALCOGENIDES; CRYSTAL LATTICES; CRYSTAL STRUCTURE; MINERALS; OXIDES; OXYGEN COMPOUNDS; PEROVSKITES; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SYNTHESIS; TITANIUM COMPOUNDS; TITANIUM OXIDES; TRANSITION ELEMENT COMPOUNDS; 400201* - Chemical & Physicochemical Properties
OSTI ID:
7232193
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Journal ID: CODEN: ZAACA
Submitting Site:
INIS
Size:
Pages: 175-179
Announcement Date:
Apr 01, 1977

Citation Formats

Schittenhelm, H J, and Kemmler-Sack, S. Polymorphism of tungsten perovskite compounds Ba/sub 2/SEsub(0. 67)WO/sub 6/. Germany: N. p., 1976. Web. doi:10.1002/zaac.19764250212.
Schittenhelm, H J, & Kemmler-Sack, S. Polymorphism of tungsten perovskite compounds Ba/sub 2/SEsub(0. 67)WO/sub 6/. Germany. https://doi.org/10.1002/zaac.19764250212
Schittenhelm, H J, and Kemmler-Sack, S. 1976. "Polymorphism of tungsten perovskite compounds Ba/sub 2/SEsub(0. 67)WO/sub 6/." Germany. https://doi.org/10.1002/zaac.19764250212.
@misc{etde_7232193,
title = {Polymorphism of tungsten perovskite compounds Ba/sub 2/SEsub(0. 67)WO/sub 6/}
author = {Schittenhelm, H J, and Kemmler-Sack, S}
abstractNote = {The compounds Ba/sub 2/SEsub(0.67)WO/sub 6/ with SE = Gd-Lu are polymorphic. Above 1200/sup 0/C the instable cubic modification (ordered perovskite with 4 formula units Ba/sub 2/SEsub(0.67)vacantsub(0.33)WO/sub 6/ per cell) transforms irreversibly into a hexagonal modification with completely filled cationic lattice. For Ba/sub 2/Eusub(0.67)WO/sub 6/ the transformation is incomplete. With SE = Nd and Sm only the cubic modification is formed.}
doi = {10.1002/zaac.19764250212}
journal = []
volume = {425:2}
journal type = {AC}
place = {Germany}
year = {1976}
month = {Sep}
}