X-ray powder diffraction refinement of Ag2In2SiSe6 structure and phase diagram of the AgInSe2-SiSe2 system

The phase diagram of the AgInSe2-SiSe2 system was investigated using the results of differential thermal analysis and X-ray diffraction. The existence of a new quaternary phase, Ag2In2SiSe6, was discovered in the system; it melts congruently at 1100 K and has a polymorphous transition at 1040K. The...

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Bibliographic Details
Published in:Journal of alloys and compounds 2006-04, Vol.414 (1-2), p.73-77
Main Authors: OLEKSEYUK, I. D, SACHANYUK, V. P, PARASYUK, O. V
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
Crystallographic aspects of phase transformations
pressure effects
Exact sciences and technology
Inorganic compounds
Physics
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
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Summary:The phase diagram of the AgInSe2-SiSe2 system was investigated using the results of differential thermal analysis and X-ray diffraction. The existence of a new quaternary phase, Ag2In2SiSe6, was discovered in the system; it melts congruently at 1100 K and has a polymorphous transition at 1040K. The crystal structure of the low-temperature (LT) modification of this phase was investigated using powder X-ray diffraction. Ag2In2SiSe6 crystallizes in a monoclinic structure, space group (S.G.) Cc (structural type Ag2In2GeSe6), with lattice parameters a = 1.26683(4) nm, b = 0.74565(3) nm, c = 1.26133(4) run and beta = 109.286(2) deg . The atomic parameters were refined in the isotropic approximation to R(I) = 0.0758 and R(P) = 0.1096.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2005.07.025