Temperature-dependent TE properties for AMg2Bi2 (A = Eu, Eu0.5Ca0.5, Eu0.5Yb0.5). (A) Electrical resistivity, (B) Seebeck coefficient, (C) power factor, (D) total thermal conductivity, (E) lattice thermal conductivity, and (F) ZT values. (Insets) Respective TE properties for the three base compositions AMg2Bi2 (A = Ca, Yb, Eu), shown separately.