Erdite
Konnert J A, Evans H T
American Mineralogist 65 (1980) 516-521
The crystal structure of erdite, NaFeS2*2H2O
Locality:  Coyote Peak, Humboldt County, California, USA
_database_code_amcsd 0000785
10.693 9.115 5.507 90 92.17 90 C2/c
atom    x     y    z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Na      0  .387  .25  0.042  0.036  0.017      0  0.007      0
Fe      0 -.001  .25  0.021  0.011  0.007      0  0.002      0
S    .118  .864 .008  0.019  0.022  0.010  0.009  -.007  -.001
Wat  .130  .584 .414  0.065  0.027  0.004  -.012  0.001  0.005