AM_Kupletskite_8
Formula: Mn6.078 Na.781 Mg.066 (Ti1.188 Nb.812) Si8 K1.952 O30 F.5 H4
Name: Kupletskite
Unit cell: 5.4039 11.9243 11.7394 112.942 94.732 103.135 , V=665.94
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: MSH15a, Locality: nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada