AM_Hauyne Formula: Al3 Si3 O21 K.8 Ca3.6 Na2.16 S.76 Name: Hauyne Unit cell: 9.1097 9.1097 9.1097 90.0 90.0 90.0 , V=755.98 Space group: P-43N (218)

Hassan I , Grundy H D , The Canadian Mineralogist , 29 (1991) p.123-130, The crystal structure of hauyne at 293 and 153 K, Sample: at T = 153 K, Locality: Valle Biacheela, Sacrafano, Italy