Citation: Bosi, F.; Lucchesi, S. (2004). Crystal chemistry of the schorl-dravite series Note: Tourmaline TM9914b. European Journal of Mineralogy, 16, pp. 335-344.
Formula: Al5.805 B3 Ca0.163 Cr0.003 F0.042 Fe1.404 H0.509 K0.005 Mg1.728 Mn0.003 Na0.731 O30.958 Si5.91 Ti0.09 V0.045 Zn0.009
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al45 B9 Cr9 F3 Fe36 Mg27 Mn9 O96 Si18 Ti9 V9 Zn9 (Al15 B3 Cr3 F Fe12 Mg9 Mn3 O32 Si6 Ti3 V3 Zn3)