Interaction
of the components in the Ag2Se–SnSe2–As2Se3
system
Chem.
Met. Alloys 1
(2008) 115-119
https://doi.org/10.30970/cma1.0040
O.F. ZMIY, L.D. GULAY, T.A. OSTAPYUK, O.S. KLYMOVYCH
The isothermal section of the quasi-ternary Ag2Se–SnSe2–As2Se3 system at 520 K was constructed
using differential-thermal and X-ray phase analyses. The existence of a quaternary compound, Ag2SnAs6Se12
(space group Rm, a = 0.38118(1)
nm, c = 3.9724(3) nm) with incongruent type of melting at 690 K, was established. The Se atoms in the structure of the
Ag2SnAs6Se12 compound are stacked in a close-packed arrangement with the layers in the
sequence ABC. A statistical mixture of cations
(0.333Ag+0.167Sn+0.500As)
occupy
one half of the octahedral interstices. The remaining As
atoms are distributed over the other octahedral interstices.
Phase diagram of the SnSe2–As2Se3 system (1 - L; 2 – L+SnSe2; 3 – L+As2Se3; 4 – SnSe2+As2Se3).
Keywords
Semiconductors
/ Phase equilibria / Isothermal section /