Klockmannite
Berry L G
American Mineralogist 39 (1954) 504-509
The crystal structure of covellite, CuS and klockmannite, CuSe
_database_code_amcsd 0000066
3.938 3.938 17.25 90 90 120 P6_3/mmc
atom   x   y    z
Cu1  1/3 2/3  .75
Cu2  1/3 2/3 .107
Se1  1/3 2/3  .25
Se2    0   0 .066