Citation: Grice, J. D.; Ercit, T. S. (1993). Ordering of Fe and Mg in the tourmaline crystal structure: The correct formula Sample: Feruvite 53776. Neues Jahrbuch fur Mineralogie, Abhandlungen, 165, pp. 245-266.
Formula: Al4.8 B3.12 Ca0.62 Fe1.98 H3.6 Mg2.04 Na0.4 O31 Si5.77 Ti0.28
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al27 B27 Fe36 H12 Mg27 O93 Si18 Ti36 (Al9 B9 Fe12 H4 Mg9 O31 Si6 Ti12)
Multiplicity: 1