Thermodynamic restrictions of LPE of bismuth-containing А3В5 solid solutions

A heterophase equilibrium estimation procedure is proposed for systems InBiAsSb and GaInBiAsSb using the simple solution model and a ‘virtual’ GaBi compound. Thermodynamic characteristics and crystal-chemical parameters of the GaBi compound have been determined for the calculation with the linear interpolation method. Phase equilibrium in In–Bi–As–Sb and Ga–In–Bi–As–Sb systems has been analyzed for the 650–780 K temperature range. The existence limits for solid solutions have been set and the thermodynamic restrictions characterizing the capacity for synthesis have been ascertained. The data obtained may be useful in optimization of LPE methods.