AM_Kupletskite_5 Formula: Mn6.126 Na.723 (Ti1.106 Nb.894) Si8 K2 Ca.051 O30 F.5 H4 Name: Kupletskite Unit cell: 5.4203 11.9392 11.7229 113.001 94.7348 103.1598 , V=667.42 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: MSH8, Locality: nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada