AM_Kupletskite_11 Formula: Mn6.243 Na.772 (Ti1.574 Nb.426) Si8 K1.82 Ca.114 O30 F.5 H4 Name: Kupletskite Unit cell: 5.4028 11.9178 11.7 113.036 94.671 103.163 , V=662.73 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: MSH38a, Locality: altered nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada