Citation: Wardle, R.; Brindley, G. W. (1972). The crystal structures of pyrophyllite, 1Tc, and of its dehydroxylate. American Mineralogist, 57, pp. 732-750.
Formula: Al2 O11 Si4
List type: noninterleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Al4 O22 Si8 (Al2 O11 Si4)
Multiplicity: 1
Coordination sequences: