AM_Vertumnite Formula: Al2.126 Ca2 Si1.434 O15.72 H22 Name: Vertumnite Unit cell: 5.755 5.755 25.12 90.0 90.0 120.0 , V=720.51 Space group: P63/M (176)

Galli E , Passaglia E , Tschermaks Mineralogische und Petrographische Mitteilungen , 25 (1978) p.33-46, Vertumnite: its crystal structure and relationship with natural and synthetic phases, Locality: Campomorto, Montalto di Castro