Tiemannite
Earley J W
American Mineralogist 35 (1950) 337-364
Description and syntheses of the selenide minerals
_database_code_amcsd 0000050
6.084 6.084 6.084 90 90 90 F-43m
atom   x   y   z
Hg     0   0   0
Se   .25 .25 .25