ZnS (Smallest Cation/Anion) NaCl Theory:0.41 (Intermediate Cation/Anion) MgSe(0.33) MgS(0.35) CaTe(0.45) Mg0(0.46) NaCl,all MX (M=Li,K,Na) except M=Cs All CaS,MgS,MgSe,MY KOH,KCN XIII-11Theory: 0.41 MgSe (0.33) MgS (0.35) CaTe (0.45) MgO (0.46) NaCl, all MX (M=Li, K, Na) except M=Cs All CaS, MgS, MgSe, MY KOH, KCN NaCl ZnS (Smallest Cation/Anion) (Intermediate Cation/Anion) XIII-11