Citation: Toraya, H.; Iwai, S.I.; Hirao, M.; Marumo, F. (1978). The crystal structure of a germanate mica, K Mg3 Ge3 Al O10 F2. Mineralogical Journal (Japan), 9, pp. 221-230.
Formula: Al F2 Ge3 K Mg3 O10
Chemical name: K Mg3 Ge3 Al O10 F2
List type: noninterleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Al8 F4 Ge8 Mg6 O20 (Al4 F2 Ge4 Mg3 O10)
Multiplicity: 1