AM_Kupletskite_6
Formula: Mn6.1 Na.685 (Ti1.858 Nb.142) Si8 K1.8 Ca.295 O30 F.5 H4
Name: Kupletskite
Unit cell: 5.3989 11.9528 11.7458 112.983 94.854 103.062 , V=667.01
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: MSH9, Locality: nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada