AM_Astrophyllite_2 Formula: Mn1.82 Na.62 Fe4.028 Mg.388 (Ti1.93 Nb.07) Si8 K1.84 Ca.22 O30 F.5 H8 Name: Astrophyllite Unit cell: 5.3776 11.899 11.662 113.114 94.63 103.09 , V=656.40 Space group: P-1 (2)

Piilonen P C , McDonald A M , Lalonde A E , The Canadian Mineralogist , 41 (2003) p.27-54, Insights into astrophyllite-group minerals II: Crystal chemistry, Sample: RUS4, nepheline syenite pegmatite, Locality: Khibina massif, Kola Peninsula, Russia