Synthesis and structure of Sr sub 1. 5 Ba sub 0. 5 CuO sub 2 (CO sub 3 ): An oxycarbonate containing infinite CuO sub 2 layers. [Title compound not superconducting]
Journal Article
·
· Journal of Solid State Chemistry; (United States)
- Rutherford Appleton Lab., Didcot (United Kingdom)
- Univ. of Birmingham (United Kingdom)
The synthesis and structure of the layered oxycarbonate Sr{sub 1.5}Ba{sub 0.5}CuO{sub 2}(CO){sub 3} is reported here. The structure determined by time-of-flight neutron powder diffraction both at room temperature and at 4 K is tetragonal, space group P4/mmm, with lattice parameters a = 3.928(11) {angstrom} and c = 7.6045(2) {angstrom} (room temperature). The structure of the oxycarbonate is composed of alternating carbonate and (CuO{sub 2}) {proportional to} layers separated by layers of alkaline-earth cations; considerable orientational disorder of the carbonate groups was evident even at 4 K. Based on the detailed structural features of the new oxycarbonates the authors can now discuss possible limitations on their substitutional chemistry; these will have important implications in attempts to drive the system metallic - and perhaps superconducting.
- OSTI ID:
- 7241264
- Journal Information:
- Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 98:2; ISSN 0022-4596; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHEMICAL PREPARATION
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
EXPERIMENTAL DATA
INFORMATION
LATTICE PARAMETERS
LAYERS
NEUTRON DIFFRACTION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SCATTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SYNTHESIS
TEMPERATURE EFFECTS
TIME-OF-FLIGHT METHOD
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHEMICAL PREPARATION
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
EXPERIMENTAL DATA
INFORMATION
LATTICE PARAMETERS
LAYERS
NEUTRON DIFFRACTION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SCATTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SYNTHESIS
TEMPERATURE EFFECTS
TIME-OF-FLIGHT METHOD
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION