Citation: Biagioni, C.; Mauro, D.; Pasero, M.; Bonaccorsi, E.; Lepore, G. O.; Zaccarini, F.; Skogby, H. (2020). Crystal-chemistry of sulfates from the Apuan Alps (Tuscany, Italy). VI. Tl-bearing alum-(K) and voltaite from the Fornovolasco mining complex. American Mineralogist, 105, pp. 1088-1098.
Formula: Al Fe6.44 H24 K1.872 Mg1.56 O66 S12 Tl0.128