Citation: Grice, J. D.; Ercit, T. S. (1993). Ordering of Fe and Mg in the tourmaline crystal structure: The correct formula Sample: Schorl CROSS. Neues Jahrbuch fur Mineralogie, Abhandlungen, 165, pp. 245-266.
Formula: Al6.393 B3.102 Fe2.106 H3.65 Li0.09 Mg0.171 Mn0.081 Na0.49 O31 Si5.898 Zn0.159
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al27 B27 Fe27 H9 Li9 Mg9 Mn9 O96 Si18 Zn9 (Al9 B9 Fe9 H3 Li3 Mg3 Mn3 O32 Si6 Zn3)
Multiplicity: 1