AM_Astrophyllite_6 Formula: Mn1.994 Fe4.325 Mg.039 (Ti1.242 Zr.758) Si8 K1.78 Na.594 Ca.126 O30 F.5 H8 Name: Astrophyllite Unit cell: 5.3996 11.9152 11.7077 113.0413 94.5707 103.1239 , V=663.00 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: MSH34a, Locality: nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada