Citation: Pabst, A. (1955). Redescription of the single layer structure of the micas. American Mineralogist, 40, pp. 967-974.
Formula: Al H2 K Mg3 O12 Si3
List type: noninterleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Al8 Mg4 O20 Si8 (Al2 Mg O5 Si2)
Multiplicity: 1
Coordination sequences: