Citation: Heaney, P. J.; Post, J. E.; Evans, H. T. (1992). The crystal structure of bannisterite. Clays and Clay Minerals, 40, pp. 129-144.
Formula: Al2.352 Ca Fe2.9 H58 K0.76 Mg2.86 Mn12.44 O103.69 Si29.648 Zn2.02
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al32 Fe80 Mg80 Mn80 O368 Si128 Zn80 (Al2 Fe5 Mg5 Mn5 O23 Si8 Zn5)