Citation: Guggenheim, S.; Bailey, S. W. (1977). The refinement of zinnwaldite-1M in subgroup symmetry Note: the sample is from the Sadisdorf Mine dump, East Germany. American Mineralogist, 62, pp. 1158-1167.
Formula: Al1.908 F2 Fe0.93 K0.9 Li0.67 Mg0.01 Mn0.05 Na0.05 O10 Si3.092 Ti0.01
List type: noninterleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Al10 F4 Fe4 Li2 Mg2 Mn2 O20 Si8 Ti2 (Al5 F2 Fe2 Li Mg Mn O10 Si4 Ti)
Multiplicity: 1