AM_Kupletskite
Formula: Mn6.266 Na.903 (Ti1.8 Nb.2) Si8 K1.742 Ca.059 O30 F.5 H4
Name: Kupletskite
Unit cell: 5.3784 11.9085 11.7236 112.964 94.697 103.112 , V=661.08
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, Note: sample NOR17, alkali granite, Locality: Gjerdingen intrusion, Norway