Phases in the system Ba[sub 2]M[sub 2][sup [minus]x]Cu[sub x]O[sub 4+[delta]], M = In, Sc: Structure and oxygen stoichiometry
Journal Article
·
· Journal of Solid State Chemistry; (United States)
- Univ. of Southampton, Southampton (United Kingdom)
Members of the series Ba[sub 2]M[sub 2[minus]x]Cu[sub x]O[sub 4+[delta]], M = In, Sc (0 [le] x [le] 1), have been synthesized by solid-state reaction methods and products characterized by powder X-ray diffraction (PXD). Selected compounds have been annealed under oxygen at 1 atm and oxygen stoichiometries for unannealed and oxygen annealed samples have been calculated following thermogravimetric analysis (TGA). Structures of M = In, x = 0, 0.5, 1 and M = Sc, x = 1 were determined by Rietveld analysis of PXD data. Ba[sub 2]In[sub 2]O[sub 5] has been shown to crystallize in the orthorhombic space group Ibm2 (Brownmillerite structure) with a = 6.0956(1) [angstrom], b =16.7112(3) [angstrom], c = 5.9601(1) [angstrom]. The copper-containing phases adopt a tetragonal [open quotes]doubled perovskite[close quotes] structure built up of copper-substituted BaInO[sub 2.5] cubes. The copper coordination and oxidation state can be controlled by varying the oxygen level of the structure.
- OSTI ID:
- 7274294
- Journal Information:
- Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 107:1; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
GRAVIMETRIC ANALYSIS
HEAT TREATMENTS
INDIUM COMPOUNDS
INDIUM OXIDES
LATTICE PARAMETERS
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SCANDIUM COMPOUNDS
SCANDIUM OXIDES
STOICHIOMETRY
STRUCTURAL CHEMICAL ANALYSIS
TETRAGONAL LATTICES
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION ELEMENT COMPOUNDS
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
GRAVIMETRIC ANALYSIS
HEAT TREATMENTS
INDIUM COMPOUNDS
INDIUM OXIDES
LATTICE PARAMETERS
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SCANDIUM COMPOUNDS
SCANDIUM OXIDES
STOICHIOMETRY
STRUCTURAL CHEMICAL ANALYSIS
TETRAGONAL LATTICES
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION ELEMENT COMPOUNDS