AM_Kupletskite_3 Formula: Mn6.217 Na.847 Mg.023 (Ti1.82 Nb.18) Si8 K1.68 Ca.191 O30 F.5 H4 Name: Kupletskite Unit cell: 5.3982 11.9534 11.7433 112.9903 94.8413 103.0664 , V=666.79 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 MSH2, Locality: nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada