AM_Hydroxy-schorl_3
Formula: Na.731 Ca.163 K.005 Fe1.404 Al5.805 Mg1.728 Ti.09 V.045 Zn.009 Cr.003 Mn.003 Si5.91 B3 O30.958 F.042 H.509
Name: Hydroxy-schorl
Unit cell: 15.9821 15.9821 7.2215 90.0 90.0 120.0 , V=1597.44
Space group: R3M (160)

Bosi F , Lucchesi S , European Journal of Mineralogy , 16 (2004) p.335-344, Crystal chemistry of the schorl-dravite series, Note: Tourmaline TM9914b, Locality: Lake Baikal, Siberia