AM_Afghanite Formula: Si12 Al12 O60 Ca5 Cl2.9 F.1 K2.36 Na8.64 S3 Name: Afghanite Unit cell: 12.8013 12.8013 21.4119 90.0 90.0 120.0 , V=3038.74 Space group: P31C (159)

Ballirano P , Bonaccorsi E , Maras A , Merlino S , European Journal of Mineralogy , 9 (1997) p.21-30, Crystal structure of afghanite, the eight-layer member, of the cancrinite-group: evidence for long-range Si,Al ordering