Citation: Hendricks, S. B.; Jefferson, M. E. (1938). Crystal structure of vermiculites and mixed vermiculite-chlorites. American Mineralogist, 23, pp. 851-862.
Formula: H2 Mg3 O12 Si4
List type: interleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Mg6 O24 Si8 (Mg3 O12 Si4)
Multiplicity: 1
Coordination sequences: