AM_Jasmundite Formula: Ca11 Si4 O18 S Name: Jasmundite Unit cell: 10.461 10.461 8.813 90.0 90.0 90.0 , V=964.43 Space group: I-4M2 (119)

Dent Glasser L S , Lee C K , Acta Crystallographica, Section B , 37 (1981) p.803-806, The structure of jasmundite, Ca22(SiO4)8O4S2, Locality: Ettringer Feld lava flow, Bellerberg volcano, Mayen, Eifel, Germany