AM_Franzinite Formula: Si30 Al30 O196 S10 K15.32 Na15.4 H12 Name: Franzinite Unit cell: 12.916 12.916 26.543 90.0 90.0 120.0 , V=3834.75 Space group: P321 (150)

Ballirano P , Bonaccorsi E , Maras A , Merlino S , The Canadian Mineralogist , 38 (2000) p.657-668, The crystal structure of franzinite, the ten-layer mineral of, the cancrinite group