Citation: Bosi, F.; Lucchesi, S. (2004). Crystal chemistry of the schorl-dravite series Note: Tourmaline TM9840f. European Journal of Mineralogy, 16, pp. 335-344.
Formula: Al6.291 B3 Ca0.187 Cr0.006 F0.054 Fe0.342 H0.442 K0.013 Mg2.214 Mn0.012 Na0.594 O30.946 Si5.952 Ti0.144 V0.039 Zn0.006
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al45 B9 Cr9 F3 Fe9 Mg27 Mn9 O96 Si18 Ti9 V27 Zn9 (Al15 B3 Cr3 F Fe3 Mg9 Mn3 O32 Si6 Ti3 V9 Zn3)