Correction: Thermoelectric properties of AMg<sub>2</sub>X<sub>2</sub>, AZn<sub>2</sub>Sb<sub>2</sub> (A = Ca, Sr, Ba; X = Sb, Bi), and Ba<sub>2</sub>ZnX<sub>2</sub> (X = Sb, Bi) Zintl compounds
Journal of materials chemistry. A