AM_Tuscanite Formula: K.51 Ca2.89 (Si3.15 Al1.85) S.95 O15 Name: Tuscanite Unit cell: 24.03 5.11 10.88 90.0 106.94 90.0 , V=1278.02 Space group: P121/A1 (14)

Mellini M , Merlino S , Rossi G , American Mineralogist , 62 (1977) p.1114-1120, The crystal structure of tuscanite, Note Sample from the pumice deposit in Pitigliano, Tuscany, Italy