Alpersite
Peterson R C, Hammarstrom J M, Seal II 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: Big Mike mine, Nevada, USA
_database_code_amcsd 0004014
14.166 6.534 10.838 90 105.922 90 P2_1/c
atom      x     y     z  occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Mg1       0     0     0 .964   .031   .031   .033  .0032  .0093   .002
Cu1       0     0     0 .036   .031   .031   .033  .0032  .0093   .002
Mg2      .5    .5     0 .402  .0310  .0348  .0241  .0049  .0055  .0018
Cu2      .5    .5     0 .598  .0310  .0348  .0241  .0049  .0055  .0018
S    .22874 .4693 .1744       .0327  .0381  .0323  .0005  .0088  .0010
O1    .2019 .4718 .0327        .050   .047   .030   .008   .005   .003
O2    .1440 .5424 .2159        .040   .059   .062   .021   .025   .013
O3    .3142 .6036 .2245        .045   .059   .043   .018   .012   .010
O4    .2533 .2582 .2230        .061   .027   .046   .008   .010   .005
Wat1  .1053 .3750 .4255        .065   .070   .062   .038   .034   .022
Wat2  .1043 .9561 .1765        .046   .048   .052   .001   .002   .005
Wat3  .0273 .7908 .4297        .055   .035   .053   .004   .014   .005
Wat4  .4810 .4535 .1751        .049   .046   .038   .005   .012   .003
Wat5  .4309 .2692 .4419        .050   .046   .039  .0073   .011   .005
Wat6  .3491 .8418 .4400        .043   .056   .047   .001   .008   .006
Wat7  .3666 .0073 .1123        .046   .039   .046   .002   .008   .003