The spinodal and binodal isotherms in GaInAsSb solid alloys were calculated
with the regular solution model approximation using standard thermodynamic
functions of the binaries to describe the interatomic interaction in multi
-component alloys. The available experimental data on LPE and MOVPE grown l
ayers are in a good agreement with the calculated miscibility and instabili
ty gaps. (C) 2000 Elsevier Science B.V. All rights reserved.