AM_Rankinite_1 Formula: Ca3 Si2 O7 Name: Rankinite Unit cell: 10.557 8.885 7.858 90.0 119.586 90.0 , V=640.97 Space group: P121/A1 (14)

Saburi S , Kusachi I , Henmi C , Kawahara A , Henmi K , Kawada I , Mineralogical Journal , 8 (1976) p.240-246, Refinement of the structure of rankinite