Citation: Bosi, F.; Lucchesi, S. (2004). Crystal chemistry of the schorl-dravite series Note: Tourmaline sample TM507c. European Journal of Mineralogy, 16, pp. 335-344.
Formula: Al5.37 B3 Ca0.246 Cr0.3 F0.081 H0.536 K0.012 Mg2.55 Na0.457 O30.919 Si5.952 Ti0.024 V0.804
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al45 B9 Cr27 F3 Mg27 O96 Si18 Ti9 V27 (Al15 B3 Cr9 F Mg9 O32 Si6 Ti3 V9)
Multiplicity: 1