AM_Uvite_4 Formula: Ca.595 Na.362 Mg3.201 Ti.021 V.111 Li.09 Cr.009 Al5.76 Si5.808 B3 F.784 O30.216 H3.216 Name: Uvite Unit cell: 15.938 15.938 7.179 90.0 90.0 120.0 , V=1579.29 Space group: R3M (160)

MacDonald D J , Hawthorne F C , The Canadian Mineralogist , 33 (1995) p.849-858, The crystal chemistry of Si=Al substitution in tourmaline, Sample: T76