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Ordered perovskites with cationic vacancies. 9. Compounds of the type Sr/sub 2/Srsub(1/4)Bsub(1/2)sup(III)vacantsub(1/4)WO/sub 6/ equivalent to Sr/sub 8/SrB/sub 2/sup(III)vacantW/sub 4/O/sub 24/ (Bsup(III) = La, Pr, Nd, Sm - Tm, Y)

Abstract

The compounds Sr/sub 2/Srsub(1/4)Bsub(1/2)sup(III)vacantsub(1/4)WO/sub 6/ equivalent to Sr/sub 8/SrB/sub 2/sup(III)vacantW/sub 4/O/sub 24/ belong to the group of perovskites with octahedral cationic vacancies (cation/vacancy ratio (CN 6) = 7:1). For the larger Bsup(III) ions (La, Pr, Nd, Sm-Dy) different ordering effects are observed. The perovskites with Bsup(III) = Sm, Eu, Gd are polymorphic too (HT modification: higher ordered cubic perovskite (Bsup(III) = Gd: a = 2 x 8.23/sub 4/ A); LT modification: hexagonal perovskite stacking polytype (Bsup(III) = Gd: a = 9.95/sub 4/ A; c = 19.0/sub 4/ A)). With the smaller Bsup(III) ions (Ho, Er, Tm and Y) a cubic, 1:1 ordered perovskite type is observed.
Authors:
Kemmler-Sack, S; Ehmann, A [1] 
  1. Tuebingen Univ. (Germany, F.R.). Lehrstuhl fuer Anorganische Chemie 2
Publication Date:
Aug 01, 1981
Product Type:
Journal Article
Reference Number:
AIX-13-671044; EDB-82-103970
Resource Relation:
Journal Name: Z. Anorg. Allg. Chem.; (German Democratic Republic); Journal Volume: 479
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DYSPROSIUM COMPOUNDS; LATTICE PARAMETERS; VACANCIES; ERBIUM COMPOUNDS; EUROPIUM COMPOUNDS; GADOLINIUM COMPOUNDS; HOLMIUM COMPOUNDS; LANTHANUM COMPOUNDS; PRASEODYMIUM COMPOUNDS; SAMARIUM TUNGSTATES; TERBIUM COMPOUNDS; THULIUM COMPOUNDS; TUNGSTATES; YTTRIUM COMPOUNDS; CHEMICAL PREPARATION; COLOR; CRYSTAL LATTICES; ORDER-DISORDER TRANSFORMATIONS; PALLADIUM COMPOUNDS; STRONTIUM COMPOUNDS; X-RAY DIFFRACTION; ALKALINE EARTH METAL COMPOUNDS; COHERENT SCATTERING; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; DIFFRACTION; OPTICAL PROPERTIES; ORGANOLEPTIC PROPERTIES; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; POINT DEFECTS; RARE EARTH COMPOUNDS; SAMARIUM COMPOUNDS; SCATTERING; SYNTHESIS; TRANSITION ELEMENT COMPOUNDS; 400201* - Chemical & Physicochemical Properties
OSTI ID:
5412382
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Journal ID: CODEN: ZAACA
Submitting Site:
HEDB
Size:
Pages: 184-190
Announcement Date:

Citation Formats

Kemmler-Sack, S, and Ehmann, A. Ordered perovskites with cationic vacancies. 9. Compounds of the type Sr/sub 2/Srsub(1/4)Bsub(1/2)sup(III)vacantsub(1/4)WO/sub 6/ equivalent to Sr/sub 8/SrB/sub 2/sup(III)vacantW/sub 4/O/sub 24/ (Bsup(III) = La, Pr, Nd, Sm - Tm, Y). Germany: N. p., 1981. Web. doi:10.1002/zaac.19814790823.
Kemmler-Sack, S, & Ehmann, A. Ordered perovskites with cationic vacancies. 9. Compounds of the type Sr/sub 2/Srsub(1/4)Bsub(1/2)sup(III)vacantsub(1/4)WO/sub 6/ equivalent to Sr/sub 8/SrB/sub 2/sup(III)vacantW/sub 4/O/sub 24/ (Bsup(III) = La, Pr, Nd, Sm - Tm, Y). Germany. doi:10.1002/zaac.19814790823.
Kemmler-Sack, S, and Ehmann, A. 1981. "Ordered perovskites with cationic vacancies. 9. Compounds of the type Sr/sub 2/Srsub(1/4)Bsub(1/2)sup(III)vacantsub(1/4)WO/sub 6/ equivalent to Sr/sub 8/SrB/sub 2/sup(III)vacantW/sub 4/O/sub 24/ (Bsup(III) = La, Pr, Nd, Sm - Tm, Y)." Germany. doi:10.1002/zaac.19814790823. https://www.osti.gov/servlets/purl/10.1002/zaac.19814790823.
@misc{etde_5412382,
title = {Ordered perovskites with cationic vacancies. 9. Compounds of the type Sr/sub 2/Srsub(1/4)Bsub(1/2)sup(III)vacantsub(1/4)WO/sub 6/ equivalent to Sr/sub 8/SrB/sub 2/sup(III)vacantW/sub 4/O/sub 24/ (Bsup(III) = La, Pr, Nd, Sm - Tm, Y)}
author = {Kemmler-Sack, S, and Ehmann, A}
abstractNote = {The compounds Sr/sub 2/Srsub(1/4)Bsub(1/2)sup(III)vacantsub(1/4)WO/sub 6/ equivalent to Sr/sub 8/SrB/sub 2/sup(III)vacantW/sub 4/O/sub 24/ belong to the group of perovskites with octahedral cationic vacancies (cation/vacancy ratio (CN 6) = 7:1). For the larger Bsup(III) ions (La, Pr, Nd, Sm-Dy) different ordering effects are observed. The perovskites with Bsup(III) = Sm, Eu, Gd are polymorphic too (HT modification: higher ordered cubic perovskite (Bsup(III) = Gd: a = 2 x 8.23/sub 4/ A); LT modification: hexagonal perovskite stacking polytype (Bsup(III) = Gd: a = 9.95/sub 4/ A; c = 19.0/sub 4/ A)). With the smaller Bsup(III) ions (Ho, Er, Tm and Y) a cubic, 1:1 ordered perovskite type is observed.}
doi = {10.1002/zaac.19814790823}
journal = {Z. Anorg. Allg. Chem.; (German Democratic Republic)}
volume = {479}
journal type = {AC}
place = {Germany}
year = {1981}
month = {Aug}
}