The phase diagram of the quasibinary system Ga2Te3/Ga2Se3

The phase diagram of the quasiternary system Ga2kHg3−3kSe3lTe3−3l

“…1 shows the overall compositions of all quasiternary samples that were prepared from the binary components to detect the one-and two-phase regions. The methods of preparation are described in [2][3][4].…”

“…As this is a superstructure of the zinc-blende lattice, a so-called pseudo-cubic lattice constant, defined by a * = (a 2 c/2) 1/3 , will be attributed to this lattice. Considering the composition dependences of the lattice constants for the quasibinary edge systems Ga 2 VSe 3l Te 3 − 3l [2], Hg 3 − 3k Ga 2k V k Se 3 [3], Hg 3 − 3k Ga 2k V k Te 3 [4], Hg(Se l Te 1 − l ) [5] and including the cubic and pseudo-cubic lattice constants of the quasiternary samples, as determined for the present paper, the composition dependence of the lattice constant in the quasiternary system can be described by a (k, l)/pm = 645.94 − 57.16k − 8.03k 2 + 9.62k 3 − 10.72kl + 14.30k 2 l − 11.36k 3 l − 37.44l.…”

“…Moreover, the quasibinary edge systems Hg(Se l Te 1 − l ) [1] and Ga 2 (Se l Te 1 − l ) 3 [2] show complete solid solubility. But, considering the stoichiometry of the Ga chalcogenides, the situation will become more complicated because of the structural vacancies in their cationic sublattice, i.e.…”

The phase diagram of the quasibinary system Hg3Se3/Ga2Se3

“…In [11] it was reported that beside the cubic modification, called ␣-Ga 2 V Se 3 (Fig. 3, type (a)), an ordered ␤-modification of Ga 2 V Se 3 exists [5].…”

“…The disordering entropy of pure Ga 2 V Se 3 (k = 1) was determined in [11] as Tr S 0 = 0.6 J/(mol K). This rather small value suggests a small difference in the degree of order between the solid solution and the ordered structure.…”