Citation: Ribbe, P. H.; Gibbs, G. V. (1971). Crystal structures of the humite minerals: III. Mg/Fe ordering in humite and its relation to other ferromagnesian silicates. American Mineralogist, 56, pp. 1155-1173.
Formula: F Fe0.399 H Mg6.601 O13 Si3
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: F8 Fe28 Mg28 O56 Si12 (F2 Fe7 Mg7 O14 Si3)
Multiplicity: 1