AM_Lazurite_4 Formula: Na3.172 Ca.828 (Si3 Al3) S1.022 O13.76 Cl.048 Name: Lazurite Unit cell: 9.077 9.077 9.077 90.0 90.0 90.0 , V=747.87 Space group: P23 (195)

Rastsvetaeva R K , Bolotina N B , Sapozhnikov A N , Kashaev A A , Schoenleber A , Chapuis G , Crystallography Reports , 47 (2002) p.404-407, Average structure of cubic lazurite with a three-dimensional incommensurate, modulation, Locality: Malo-Bystrinskoe deposit, Lake Baikal region, Russia