Citation: Foit, F. F. (1989). Crystal chemistry of alkali-deficient schorl and tourmaline structural relationships. American Mineralogist, 74, pp. 422-431.
Formula: Al7.029 B3 F0.14 Fe1.761 H3.38 Mg0.33 Na0.55 O30.86 Si5.862 Ti0.018
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al45 B9 F3 Fe9 H9 Mg9 O96 Si18 Ti9 (Al15 B3 F Fe3 H3 Mg3 O32 Si6 Ti3)
Multiplicity: 1