Synthesis and Characterization of SrBi
SrBi{sub 2}Se{sub 4} was synthesized at 945 C and its structure was determined using single-crystal X-ray diffraction data obtained at 165 K. SrBi{sub 2}Se{sub 4}is isotypic to 12-Ba Bi{sub 2}Se{sub 4} and Eu1.1 Bi{sub 2}Se{sub 4}. The compound crystallizes in P6{sub 3}/m (Z=12) with a=25.970(2) {angstrom} and c=4.2437(3) {angstrom}. Final R{sub 1}=0.0630 and w R{sub 2}=0.1246 (I > 2{sigma}(I)). The coordination environments of Bi are distorted Se octahedra. These octahedra build up a uniaxial three-dimensional network with tunnels along the z direction, which are filled by Sr{sup 2+}. There is also a second tunnel along the z direction which is partially occupied by Bi atoms. The coordination spheres of Sr are bicapped trigonal prisms of Se. Transport measurements indicate that SrBi{sub 2}Se{sub 4}is semiconducting. This work adds one high-symmetry compound to the family of complex chalcogenides, in which low-symmetry compounds are common.
- Research Organization:
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York (US)
- Sponsoring Organization:
- Office of Naval Research (US); National Science Foundation Materials Research Science & Engineering Centers Program (US)
- OSTI ID:
- 784352
- Journal Information:
- Journal of Solid State Chemistry, Vol. 156, Issue 1; Other Information: PBD: 1 Jan 2001; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ATOMS
CHALCOGENIDES
SYNTHESIS
TRANSPORT
X-RAY DIFFRACTION
CHEMICAL PREPARATION
TEMPERATURE RANGE 1000-4000 K
TEMPERATURE RANGE 0065-0273 K
BISMUTH SELENIDES
STRONTIUM COMPOUNDS
BISMUTH SELENIDE
HEXAGONAL LATTICES
SPACE GROUPS
LATTICE PARAMETERS
SEMICONDUCTOR MATERIALS
THERMOELECTRIC MATERIALS
ELECTRONIC STRUCTURE
ELECTRIC CONDUCTIVITY
EXPERIMENTAL DATA