Citation: Bosi, F.; Lucchesi, S. (2004). Crystal chemistry of the schorl-dravite series Note: Tourmaline TM504c. European Journal of Mineralogy, 16, pp. 335-344.
Formula: Al5.262 B3 Ca0.412 Cr0.168 F0.314 Fe0.006 H0.248 K0.015 Mg2.784 Mn0.003 Na0.477 O30.685 Si5.91 Ti0.027 V0.831 Zn0.015
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al45 B9 Cr27 F3 Fe9 Mg27 Mn9 O96 Si18 Ti9 V27 Zn9 (Al15 B3 Cr9 F Fe3 Mg9 Mn3 O32 Si6 Ti3 V9 Zn3)