Citation: Brown, G. E.; Gibbs, G. V. (1969). Refinement of the crystal structure of osumilite. American Mineralogist, 54, pp. 101-116.
Formula: Al4.44 Ca0.01 Fe1.28 H1.992 K0.71 Mg0.92 Mn0.16 Na0.28 O30.996 Si10.2
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al30 Fe10 Mg4 Mn4 O60 Si24 (Al15 Fe5 Mg2 Mn2 O30 Si12)
Multiplicity: 1