Citation: Guggenheim, S.; Chang, Y. H.; Koster van Groos, A. F. (1987). Muscovite dehydroxylation: High-temperature studies Sample: T = 20 deg C, from Diamond mine, Keystone, South Dakota. American Mineralogist, 72, pp. 537-550.
Formula: Al2.73 F0.17 Fe0.16 H1.83 K0.93 Na0.07 O11.83 Si3.1
List type: interleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Al12 F4 Fe4 O24 Si8 (Al3 F Fe O6 Si2)
Multiplicity: 1