Pentahydrite
Peterson R C, Hammarstrom J M, Seal R R
American Mineralogist 91 (2006) 261-269
Alpersite (Mg,Cu)SO4*7H2O, a new mineral of the melanterite group, and cuprian
pentahydrite: Their occurrence within mine waste
Locality: Miami, Arizona, USA
_database_code_amcsd 0004017
6.2470 10.5995 6.0395 82.530 109.408 104.794 P-1
atom     x     y     z occ Uiso
Mg1      0     0     0  .1 .056
Cu1      0     0     0  .9 .056
Mg2     .5    .5     0  .7 .037
Cu2     .5    .5     0  .3 .037
S    .0368 .2935 .6402     .039
O1    .911 .1662  .666     .037
O2    .263 .3227  .847     .037
O3    .872 .3720  .639     .037
O4    .053 .2958  .411     .037
Wat1  .821 .0687  .178     .037
Wat2  .312 .1161  .173     .037
Wat3  .535 .5917  .671     .037
Wat4  .230 .5917  .988     .037
Wat5  .446 .1289  .647     .037