Complex Structural Disorder in Thermoelectric Zintl Phases Eu21M4As18 (M = Mn, Zn). - Ishtiyak, Mohd; Watts, Spencer R.; Pokhvata, Olha; Kandabadage, Thimira; Baranets, Sviatoslav (Zeitschrift für Anorganische und Allgemeine Chemie, 2025)