#21
C222
Example – Godlevskite, (Ni,Fe)9S8
Fleet, M.E.
Acta Crystallographica C43 (1987) 2255-2257
http://webmineral.com/data/Godlevskite.shtml
CIF
http://rruff.geo.arizona.edu/AMS/download.php?id=11216.cif&down=cif
The cations are surrounded by tetrahedrally as well as square-pyramidally arranged sulfide anions.
The Fascination of Crystals and Symmetry 