AM_Penkvilksite_2
Formula: Ti Si4 Na2 O13 H2
Name: Penkvilksite
Unit cell: 16.32 8.7378 7.3854 90.0 90.0 90.0 , V=1053.16
Space group: PNCA (60)

Cadoni M , Ferraris G , Acta Crystallographica, Section C , 64 (2008) p.i87-i90, Penkvilksite-2O: Na2TiSi4O11*2H2O, Locality: synthetic, Note: the second H could not be located