Alpersite
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 0004015
14.189 6.547 10.830 90 105.872 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 .845   .027   .024   .035   .003   .010   .004
Cu1       0     0     0 .155   .027   .024   .035   .003   .010   .004
Mg2      .5    .5     0 .265   .029  .0300  .0247  .0044  .0064  .0019
Cu2      .5    .5     0 .735   .029  .0300  .0247  .0044  .0064  .0019
S    .22865 .4672 .1741       .0307  .0310  .0363  .0006  .0102  .0003
O1    .2017 .4691 .0321        .049   .046   .030   .007   .008   .001
O2    .1444 .5431 .2181        .048   .050   .059   .015   .033   .012
O3    .3152 .6028 .2240        .047   .044   .050   .018   .009   .011
O4    .2538 .2569 .2221        .050   .036   .055   .008   .009   .007
Wat1  .1057 .3789 .4256        .067   .063   .064   .030   .037   .024
Wat2  .1047 .9562 .1773        .051   .043   .046   .004   .003   .003
Wat3  .0286 .7911 .4300        .045   .034   .050   .003   .011   .008
Wat4  .4814 .4530 .1737        .043   .048   .036   .004   .013   .001
Wat5  .4294 .2645 .4391        .049   .040   .043   .007   .007   .007
Wat6  .3480 .8390 .4413        .051   .053   .045   .008   .006   .007
Wat7  .3682 .0085 .1131        .049   .036   .049   .001   .008   .004