Abstract
Evaporation and compositional changes of the liquids above the melting point of LiInSe2 crystals have been characterized quantitatively by using special techniques of a rapid thermal analysis and differential dissolution. The occurrence of a liquid immiscible region in the Li2Se-rich side of the Li2Se-In2Se3 diagram and incongruent evaporation with the preferential evaporation of In2Se3 rising markedly above boiling point were determined from the peaks on the thermal curves and from precise control over the composition of the vapour and residual solid as a function of temperature. It was shown that both the processes could be the sources of nonstoichiometry and inhomogeneity of the LiInSe2 crystals.
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