AM_Kupletskite_4 Formula: Mn5.474 Na Zn.383 Mg.117 (Ti1.248 Nb.752) Si8 K2 O30 F.5 H4 Name: Kupletskite Unit cell: 5.3887 11.913 11.751 112.961 94.746 103.117 , V=664.02 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: MSH3, Locality: nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada