Violarite
Vaughan D J, Craig J R
American Mineralogist 70 (1985) 1036-1043
The crystal chemistry of iron-nickel thiospinels
Note: structure from ICSD
_database_code_amcsd 0001000
9.465 9.465 9.465 90 90 90 *Fd-3m
.125 .125 .125
atom    x    y    z
Fe   .125 .125 .125
Ni     .5   .5   .5
S    .259 .259 .259