PHASE DIAGRAMS OF THE FeGa2S4- FeIn2S4 AND FeS- FeGaInS4 SYSTEMS

Abstract

The phase equilibriums in the FeGa 2 S 4 -FeIn 2 S 4 and FeS-FeIn 2 S 4 systems were experimentally investigated by means of differential thermal and X-ray diffraction analyses. It found that they are quasi-binary and characterized by limited mutual solubility of starting compounds. The phase with composition FeGaInS 4 crystallizes in the FeGa 2 S 4 -type structure, melts at 1375 K without decomposition, and can be characterized as a congruently melting compound by its beh avior in the phase diagram.

REFINEMENT OF THE PHASE DIAGRAM OF THE MnTe–In2Te3 SYSTEM

“…The development and creation of new methods for directed synthesis of complex phases and materials require the study of phase equilibria in the corresponding systems [16][17][18][19].…”

FeS–FeGaInS4–FeIn2S4 SYSTEM

“…The FeIn 2 S 4 ternary compound melts congruently at 1398 [25] or 1415 K [26], respectively, and crystallizes in the spinel structure (Sp.gr. Fd-3m) with the lattice parameters a = 1.0598 [27] or a = 1.053 nm [25].…”

“…The FeGaInS 4 compound also melts congruently (1375 K) and has a trigonal structure of the ZnAl 2 S 4 type (Sp.gr. P-3m1) with parameters: a = 0.37765, c = 1.22257 nm [26,28].…”

“…The boundary quasibinary components of the FeS-FeIn 2 S 4 -FeGaInS 4 system were studied in [25,26] and it was shown that they all belong to an eutectic type. According to [25], in the 2FeS-FeIn 2 S 4 system, the eutectic has a composition of 73 mol% FeS and crystallizes at 1373 K. The eutectic coordinates in the 2FeS-FeGaInS 4 system -63 mol% FeGaInS 4 and 1310 K, and in the FeIn 2 S 4 -FeGaInS 4 system -70 mol% FeIn 2 S 4 and 1340 K [26].…”

PHASE DIAGRAM OF THE FeSe–In2Se3 SYSTEM

“…The studies of the phase equilibria in systems MX-Ga 2 X 3 -In 2 X 3 (M -Mn, Fe; X -S, Se, Te) were undertaken by us in order to search and develop the physicochemical basis for obtaining new magnetic semiconductors. The preliminary results obtained [21,22] showed the formation of wide regions of solid solutions along the MGa 2 X 4 -MIn 2 X 4 sections of these systems. However, an analysis of the literature data showed that the phase diagrams of some of the boundary quasi-binary components of these quasi-ternary systems require clarification.…”