Citation: Bosi, F.; Lucchesi, S. (2004). Crystal chemistry of the schorl-dravite series Note: Tourmaline TMl2ap. European Journal of Mineralogy, 16, pp. 335-344.
Formula: Al6.675 B3 F0.177 Fe1.668 H0.512 K0.013 Li0.012 Mg0.663 Na0.633 O30.823 Si5.91 Ti0.051 Zn0.009
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al45 B9 F3 Fe45 Li9 Mg27 O96 Si18 Ti9 Zn9 (Al15 B3 F Fe15 Li3 Mg9 O32 Si6 Ti3 Zn3)
Multiplicity: 1