Citation: Guven, N. (1971). The crystal structures of 2M1 phengite and 2M1 muscovite Note: sample 2M1 muscovite. Zeitschrift fur Kristallographie, 134, pp. 196-212.
Formula: Al2.9 Fe0.04 H2 K0.86 Mg0.06 Na0.1 O12 Si3
List type: interleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Al12 Fe4 Mg4 O24 Si8 (Al3 Fe Mg O6 Si2)
Multiplicity: 1