Open AccessPhase diagram of the Ag2Se–As2Se3 system and crystal structure of the AgAs3Se5 compound
Author(s) -
О. S. Klymovych,
O. F. Zmiy,
L. D. Gulay,
T.A. OSTAPYUK
Publication year - 2008
Publication title -
chemistry of metals and alloys
Language(s) - English
Resource type - Journals
eISSN - 1998-8087
pISSN - 1998-8079
DOI - 10.30970/cma1.0067
Subject(s) - phase diagram , octahedron , crystallography , crystal structure , phase (matter) , powder diffraction , ternary operation , sequence (biology) , crystal (programming language) , diffraction , materials science , differential thermal analysis , diagram , ternary numeral system , chemistry , physics , optics , mathematics , computer science , organic chemistry , biochemistry , statistics , programming language
The phase diagram of the quasi-binary Ag 2Se–As2Se3 system was constructed using differential-thermal and X-ray phase analyses. The crystal structure of the ternary AgAs3Se5 compound (space group Rm, a = 0.38195(1) nm, c = 5.0082(2) nm, RI = 0.0868) was investigated using X-ray powder diff raction. The Se atoms form a close-packed arrangement with the laye rs stacked in the sequence ABC. The atoms of a statistical mixture M (0.5Ag+0.5As) and the remaining As atoms occupy 4/ 5 of the octahedral interstices.
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