Citation: Peterson, R. C.; McMullan, R. K. (1986). Neutron diffraction studies of sillimanite. American Mineralogist, 71, pp. 742-745.
Formula: Al1.98 Fe0.02 O5 Si
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al8 Fe8 O20 Si4 (Al2 Fe2 O5 Si)
Multiplicity: 1