Citation: Burt, J. B.; Ross, N. L.; Angel, R. J.; Koch, M. (2006). Equations of state and structures of andalusite to 9.8 GPa and sillimanite to 8.5 GPa Sample: P = 5.441 GPa. American Mineralogist, 91, pp. 319-326.
Formula: Al2 O5 Si
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al8 O20 Si4 (Al2 O5 Si)
Multiplicity: 1
Coordination sequences: