Citation: Grice, J. D.; Ercit, T. S. (1993). Ordering of Fe and Mg in the tourmaline crystal structure: The correct formula Sample: Schorl 2672. Neues Jahrbuch fur Mineralogie, Abhandlungen, 165, pp. 245-266.
Formula: Al3.42 B3 Ca0.01 Fe3.828 H3.6 Mg1.269 Na0.99 O31 Si6 Ti0.402 V0.021
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al18 B9 Fe27 H12 Mg27 O93 Si18 Ti18 V9 (Al6 B3 Fe9 H4 Mg9 O31 Si6 Ti6 V3)
Multiplicity: 1