Citation: Bosi, F.; Lucchesi, S. (2004). Crystal chemistry of the schorl-dravite series Note: Tourmaline TM84a. European Journal of Mineralogy, 16, pp. 335-344.
Formula: Al6.981 B3 Ca0.01 F0.038 Fe1.365 H0.395 K0.006 Mg0.612 Mn0.054 Na0.451 O30.963 Si5.952 Ti0.027 V0.003 Zn0.012
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al45 B9 F3 Fe54 Mg27 Mn9 O96 Si18 Ti9 V9 Zn9 (Al15 B3 F Fe18 Mg9 Mn3 O32 Si6 Ti3 V3 Zn3)