Citation: Bosi, F.; Lucchesi, S. (2004). Crystal chemistry of the schorl-dravite series Note: Tourmaline TM9840c. European Journal of Mineralogy, 16, pp. 335-344.
Formula: Al6.339 B3 Ca0.151 Cr0.003 F0.07 Fe0.348 H0.51 K0.01 Mg2.184 Mn0.012 Na0.605 O30.93 Si5.94 Ti0.129 V0.024 Zn0.021
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al45 B9 Cr9 F3 Fe27 Mg27 Mn9 O96 Si18 Ti9 V9 Zn9 (Al15 B3 Cr3 F Fe9 Mg9 Mn3 O32 Si6 Ti3 V3 Zn3)