AM_Kupletskite_9 Formula: Mn5.744 Na.593 Fe.427 Mg.073 (Ti1.292 Nb.708) Si8 K1.958 Ca.083 O30 F.5 H4 Name: Kupletskite Unit cell: 5.4206 11.9283 11.7294 112.942 94.645 103.246 , V=667.45 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: MSH19a, Locality: nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada