AM_Zinnwaldite Formula: K.9 Na.05 Al1.908 Fe.93 Ti.01 Mn.05 Li.67 Mg.01 Si3.092 O10 F2 Name: Zinnwaldite Unit cell: 5.296 9.14 10.096 90.0 100.83 90.0 , V=480.00 Space group: C121 (5)

Guggenheim S , Bailey S W , American Mineralogist , 62 (1977) p.1158-1167, The refinement of zinnwaldite-1M in subgroup symmetry, Note: the sample is from the Sadisdorf Mine dump, East Germany