AM_Astrophyllite_1 Formula: Mn1.774 Na.547 Fe4.207 Mg.075 (Ti1.644 Nb.356) Si8 (K1.828 Rb.172) Ca.179 O30 F.5 H8 Name: Astrophyllite Unit cell: 5.3857 11.9072 11.7105 113.062 94.614 103.098 , V=660.88 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, Note: sample NOR1, nepheline syenite pegmatite, Locality: Langesundsfjord area, Oslo Rift Valley, Norway