Citation: Bosi, F.; Lucchesi, S. (2004). Crystal chemistry of the schorl-dravite series Note: Tourmaline TM235b. European Journal of Mineralogy, 16, pp. 335-344.
Formula: Al6.303 B3 Ca0.094 Cr0.003 F0.046 Fe0.576 H0.572 K0.003 Mg2.064 Na0.724 O30.954 Si5.982 Ti0.063 V0.003 Zn0.012
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al45 B9 Cr9 F3 Fe45 Mg27 O96 Si18 Ti9 V9 Zn9 (Al15 B3 Cr3 F Fe15 Mg9 O32 Si6 Ti3 V3 Zn3)