Published April 2005
| Version v1
Journal article
The new semiconducting polychalcogenide Ba2SnSe5 exhibiting Se32- units and distorted SnSe6 octahedra
- 1. Department of Chemistry, University of Waterloo, Waterloo, Ont., N2L 3G1 (Canada)
Description
The new polyselenide Ba2SnSe5 was prepared from the elements under exclusion of air at temperatures between 650 and 750oC. Ba2SnSe5 crystallizes in the orthorhombic space group P212121, with the lattice parameters of a=12.3572(8)A, b=17.235(1)A, c=18.134(1)A, V=3862.1(4)A3 (Z=16). Its structure comprises nonlinear Se32- trimers, isolated SnSe4 tetrahedra and trimeric Sn3Se10 units, the latter consisting of a central (distorted) SnSe6 octahedron sharing two opposite basal edges with two SnSe4 tetrahedra. The structural differences to its Sr and Te analogs, Sr2SnSe5 and both modifications of Ba2SnTe5, are intriguing, and illustrated in detail in this article. Ba2SnSe5 is a dark brown semiconductor with a computed band gap of 1.2eV
Additional details
Identifiers
- DOI
- 10.1016/j.jssc.2005.01.011;
- PII
- S0022-4596(05)00021-6;
Publishing Information
- Journal Title
- Journal of Solid State Chemistry
- Journal Volume
- 178
- Journal Issue
- 4
- Journal Page Range
- p. 1087-1093
- ISSN
- 0022-4596
- CODEN
- JSSCBI
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37037322
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- BARIUM COMPOUNDS; ELECTRONIC STRUCTURE; LATTICE PARAMETERS; ORTHORHOMBIC LATTICES; SEMICONDUCTOR MATERIALS; SPACE GROUPS; TIN SELENIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; CRYSTAL LATTICES; CRYSTAL STRUCTURE; MATERIALS; SELENIDES; SELENIUM COMPOUNDS; SYMMETRY GROUPS; TIN COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.