#57
Pbcm
Example – BaTiOF4
Synthesis and crystal structure of BaTiOF4
Crosnier M, Fourquet J
European Journal of Solid State and Inorganic Chemistry 29 (1992) 199-206
CIF
http://rruff.geo.arizona.edu/AMS/download.php?id=14533.cif&down=cif
TiO2F4 octahedra (blue)
The Fascination of Crystals and Symmetry 