Citation: Fortier, S.; Donnay, G. (1975). Schorl refinement showing composition dependence of the tourmaline structure. The Canadian Mineralogist, 13, pp. 173-177.
Formula: Al6.09 B3 Ca0.17 Fe2.43 H4 K0.01 Li0.06 Mg0.12 Mn0.03 Na0.88 O31 Si6 Ti0.06
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al27 B9 Ca9 Fe27 Li9 Mg9 Mn9 O93 Si18 Ti9 (Al9 B3 Ca3 Fe9 Li3 Mg3 Mn3 O31 Si6 Ti3)
Multiplicity: 1