AM_Sarcolite Formula: Na3.52 Ca12 Al8 Si12.5 O55.64 P.5 C.92 Cl.08 Name: Sarcolite Unit cell: 12.343 12.343 15.463 90.0 90.0 90.0 , V=2355.78 Space group: I14/M1 (1)

Giuseppetti G , Mazzi F , Tadini C , Tschermaks Mineralogische und Petrographische Mitteilungen , 24 (1977) p.1-21, The crystal structure of sarcolite, Locality: Vesuvius volcano, Bay of Naples, Italy