AM_Uvite_2 Formula: Ca.697 Na.288 Mg3.291 Ti.027 V.051 Li.075 Cr.006 Al5.814 Si5.736 B3 F.835 O30.165 H3.165 Name: Uvite Unit cell: 15.94 15.94 7.177 90.0 90.0 120.0 , V=1579.25 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: T74