Citation: Bish, D. L.; Burnham, C. W. (1992). Rietveld refinement of the crystal structure of fibrolitic sillimanite using neutron powder diffraction data. American Mineralogist, 77, pp. 374-379.
Formula: Al2 O5 Si
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al12 O20 Si8 (Al3 O5 Si2)
Multiplicity: 1