Three ammonium-iron-sulfite phases from a burning dump of the Vasas abandoned opencast coal mine (Pécs, Mecsek Mountains, Hungary) and the new mineral kollerite. - Fehér, Béla; Szakáll, Sándor; Ende, Martin; Effenberger, Herta S.; Mihály, Judith; Sajó, István; Kótai, László; Szabó, Dávid (Mineralogy & Petrology, 2023)