X-ray diffraction investigation of solid solutions based on SnTe in the Sn-Bi-Te system

Journal Article · Thu Dec 01 04:00:00 EST 1988 · Inorg. Mater. (Engl. Transl.); (United States)

OSTI ID:5972823

Gorne, G V; Zhigareva, N K; Ivanova, A B; Rogacheva, E I

An earlier comparison of the results of x-ray diffraction investigations of solid solutions based on SnTe in the Sn-Sb-Te system and theoretical calculations made it possible to conclude that a chemical interaction takes place in these solid solutions and results in the formation of complexes of the Sb/sub 2/Te/sub 3/ type. In the case of compositions corresponding to the formation of the maximum possible number of complexes, discontinuities were discovered on plots of the concentration dependence of the unit cell. The purpose of this work was to carry out similar investigations in the Sn-Bi-Te system. The compositions of the alloys synthesized corresponded to the isoconcentration lines for 1 and 2 at. % Bi at Te concentrations from 50.0 to 51.3 at. %. In contrast to the Sn-Sb-Te system, no discontinuities are observed on the plots of the concentration dependence of the unit-cell parameter /alpha/ along the isoconcentration lines of Bi. Theoretical calculations of the concentration dependence of /alpha/ were performed for two models of the solid solutions. A portion of the solubility isotherm at 820 K was constructed on the basis of the results of the x-ray diffraction investigation. As more Bi is introduced, the boundaries of the homogeneity region of SnTe are displaced toward an increase in the content of Te.

• Research Organization: V.I. Lenin Kharkov Polytechnic (USSR)
• OSTI ID: 5972823
• Journal Information: Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 24:7; ISSN INOMA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
BISMUTH
BISMUTH COMPOUNDS
BISMUTH TELLURIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
COHERENT SCATTERING
CRYSTAL DEFECTS
CRYSTAL MODELS
CRYSTAL STRUCTURE
DIFFRACTION
DISPERSIONS
ELEMENTS
LATTICE PARAMETERS
MATHEMATICAL MODELS
METALLURGICAL EFFECTS
METALS
MIXTURES
POINT DEFECTS
QUANTITY RATIO
SCATTERING
SEMIMETALS
SOLID SOLUTIONS
SOLUTIONS
STOICHIOMETRY
TELLURIDES
TELLURIUM
TELLURIUM COMPOUNDS
TIN
TIN COMPOUNDS
TIN TELLURIDES
VACANCIES
X-RAY DIFFRACTION