Marcasite
Buerger M J
American Mineralogist 16 (1931) 361-395
The crystal structure of marcasite
Locality: Joplin, Missouri, USA
_database_code_amcsd 0000008
3.37 4.44 5.39 90 90 90 Pmnn
atom  x    y    z
Fe    0    0    0
S     0 .203 .375