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Hexagonal perovskites with cationic vacancies. 27. Systems Ba/sub 4-x/Sr/sub x/B/sup II/Re/sub 2/vacantO/sub 12/, Ba/sub 4/B/sub 1-x//sup II/Ca/sub x/Re/sub 2/vacantO/sub 12/, and Ba/sub 4-x/La/sub x/B/sup II/Re/sub 2-x/W/sub x/vacantO/sub 12/ with B/sup II/ = Co, Ni

Abstract

In the systems Ba/sub 4-x/Sr/sub x/B/sup II/Re/sub 2/vacantO/sub 12/, Ba/sub 4/B/sub 1-x//sup II/Ca/sub x/Re/sub 2/vacantO/sub 12/ and Ba/sub 4-x/La/sub x/B/sup II/Re/sub 2-x/W/sub x/va/sub x/antO/sub 12/ (B/sup II/ =Co, Ni) hexagonal perovskites with a rhombohedral 12 L structure (general composition A/sub 4/BM/sub 2/vacantO/sub 12/; sequence (hhcc)/sub 3/; space group R3m) are observed. With the exception of Ba/sub 4/NiRe/sub 2/vacantO/sub 12/ the octahedral net consists of BO/sub 6/ single octahedra and M/sub 2/vacantO/sub 12/ face connected blocks (type 1). In type 2 (Ba/sub 4/NiRe/sub 2/vacantO/sub 12/) the M ions are located in the single octahedra and in the center of the groups of three face connected octahedra. The two outer positions of the latter are occupied by B ions and vacancies in the ratio 1:1. The difference between type 1 and 2 are discussed by means of the vibrational and diffuse reflectance spectra.
Authors:
Herrmann, M; Kemmler-Sack, S [1] 
  1. Tuebingen Univ. (Germany, F.R.). Lehrstuhl fuer Anorganische Chemie 2
Publication Date:
May 01, 1981
Product Type:
Journal Article
Reference Number:
AIX-12-637439; EDB-81-130760
Resource Relation:
Journal Name: Z. Anorg. Allg. Chem.; (German Democratic Republic); Journal Volume: 476
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BARIUM COMPOUNDS; STRUCTURAL CHEMICAL ANALYSIS; CALCIUM COMPOUNDS; COBALT COMPOUNDS; LANTHANUM COMPOUNDS; NICKEL COMPOUNDS; RHENATES; STRONTIUM COMPOUNDS; TUNGSTATES; CHEMICAL PREPARATION; EXPERIMENTAL DATA; HEXAGONAL LATTICES; INFRARED SPECTRA; LATTICE PARAMETERS; SPACE GROUPS; SPECTRAL SHIFT; VACANCIES; ALKALINE EARTH METAL COMPOUNDS; CRYSTAL DEFECTS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DATA; INFORMATION; NUMERICAL DATA; OXYGEN COMPOUNDS; POINT DEFECTS; RARE EARTH COMPOUNDS; RHENIUM COMPOUNDS; SPECTRA; SYNTHESIS; TRANSITION ELEMENT COMPOUNDS; 400201* - Chemical & Physicochemical Properties
OSTI ID:
6370242
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Journal ID: CODEN: ZAACA
Submitting Site:
INIS
Size:
Pages: 115-125
Announcement Date:

Citation Formats

Herrmann, M, and Kemmler-Sack, S. Hexagonal perovskites with cationic vacancies. 27. Systems Ba/sub 4-x/Sr/sub x/B/sup II/Re/sub 2/vacantO/sub 12/, Ba/sub 4/B/sub 1-x//sup II/Ca/sub x/Re/sub 2/vacantO/sub 12/, and Ba/sub 4-x/La/sub x/B/sup II/Re/sub 2-x/W/sub x/vacantO/sub 12/ with B/sup II/ = Co, Ni. Germany: N. p., 1981. Web. doi:10.1002/zaac.19814760514.
Herrmann, M, & Kemmler-Sack, S. Hexagonal perovskites with cationic vacancies. 27. Systems Ba/sub 4-x/Sr/sub x/B/sup II/Re/sub 2/vacantO/sub 12/, Ba/sub 4/B/sub 1-x//sup II/Ca/sub x/Re/sub 2/vacantO/sub 12/, and Ba/sub 4-x/La/sub x/B/sup II/Re/sub 2-x/W/sub x/vacantO/sub 12/ with B/sup II/ = Co, Ni. Germany. doi:10.1002/zaac.19814760514.
Herrmann, M, and Kemmler-Sack, S. 1981. "Hexagonal perovskites with cationic vacancies. 27. Systems Ba/sub 4-x/Sr/sub x/B/sup II/Re/sub 2/vacantO/sub 12/, Ba/sub 4/B/sub 1-x//sup II/Ca/sub x/Re/sub 2/vacantO/sub 12/, and Ba/sub 4-x/La/sub x/B/sup II/Re/sub 2-x/W/sub x/vacantO/sub 12/ with B/sup II/ = Co, Ni." Germany. doi:10.1002/zaac.19814760514. https://www.osti.gov/servlets/purl/10.1002/zaac.19814760514.
@misc{etde_6370242,
title = {Hexagonal perovskites with cationic vacancies. 27. Systems Ba/sub 4-x/Sr/sub x/B/sup II/Re/sub 2/vacantO/sub 12/, Ba/sub 4/B/sub 1-x//sup II/Ca/sub x/Re/sub 2/vacantO/sub 12/, and Ba/sub 4-x/La/sub x/B/sup II/Re/sub 2-x/W/sub x/vacantO/sub 12/ with B/sup II/ = Co, Ni}
author = {Herrmann, M, and Kemmler-Sack, S}
abstractNote = {In the systems Ba/sub 4-x/Sr/sub x/B/sup II/Re/sub 2/vacantO/sub 12/, Ba/sub 4/B/sub 1-x//sup II/Ca/sub x/Re/sub 2/vacantO/sub 12/ and Ba/sub 4-x/La/sub x/B/sup II/Re/sub 2-x/W/sub x/va/sub x/antO/sub 12/ (B/sup II/ =Co, Ni) hexagonal perovskites with a rhombohedral 12 L structure (general composition A/sub 4/BM/sub 2/vacantO/sub 12/; sequence (hhcc)/sub 3/; space group R3m) are observed. With the exception of Ba/sub 4/NiRe/sub 2/vacantO/sub 12/ the octahedral net consists of BO/sub 6/ single octahedra and M/sub 2/vacantO/sub 12/ face connected blocks (type 1). In type 2 (Ba/sub 4/NiRe/sub 2/vacantO/sub 12/) the M ions are located in the single octahedra and in the center of the groups of three face connected octahedra. The two outer positions of the latter are occupied by B ions and vacancies in the ratio 1:1. The difference between type 1 and 2 are discussed by means of the vibrational and diffuse reflectance spectra.}
doi = {10.1002/zaac.19814760514}
journal = {Z. Anorg. Allg. Chem.; (German Democratic Republic)}
volume = {476}
journal type = {AC}
place = {Germany}
year = {1981}
month = {May}
}