AM_Hydroxy-schorl_2 Formula: Na.678 K.013 Fe1.725 Al6.798 Mg.498 Mn.048 Zn.039 Ti.03 Li.024 Si5.838 B3 O30.821 F.178 H.538 Name: Hydroxy-schorl Unit cell: 15.9736 15.9736 7.1644 90.0 90.0 120.0 , V=1583.13 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 TMl2al, Locality: Cruziero, Minas Gerais, Brazil