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The structural and the electronic properties of the ternary Sr x Ca 1-x S, Ba x Ca 1-x S and Ba x Sr 1-x S alloys have been calculated using the full-potential linear muffin-tin-orbital (FP-LMTO) method based on density functional theory, within both local density approximation (LDA) and generalized gradient approximation (GGA). The calculated equilibrium lattice constants and bulk modulus are compared with previous results. The concentration dependence of the electronic band structure and thedoi:10.4236/msa.2012.312126 fatcat:y7wgd3okardutac65w66akxohq