Leightonite Menchetti S, Bindi L, Bonazzi P, Olmi F American Mineralogist 87 (2002) 721-725 Disordered distribution of Cu in the crystal structure of leightonite, K2Ca2Cu(SO4)4.2H2O Note: H-positions estimated by Kurt Mereiter Locality: Chuquicamata, Chile _database_code_amcsd 0002814 11.654 7.497 10.097 90 125.21 90 C2/c atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) K .5889 .6223 .4264 .5 .0182 .0186 .0155 .0210 -.0001 .0117 -.0027 Ow .5889 .6223 .4264 .5 .0182 .0186 .0155 .0210 -.0001 .0117 -.0027 Ca 1/2 .1261 .25 .0112 .0101 .0094 .0133 0 .0062 0 Cu1 .25 3/4 0 .37 .0114 .0102 .0094 .0126 -.0036 .0054 -.0007 Cu2 0 0 0 .13 .0135 .012 .011 .020 -.003 .010 .011 S .6935 .1228 .6374 .0096 .0079 .0108 .0081 -.0017 .0035 -.0004 O1 .8544 .5914 .7579 .0167 .015 .022 .013 .004 .008 -.002 O2 .6599 -.0317 .5290 .0177 .018 .015 .016 -.003 .008 -.004 O3 .6546 .6558 .7624 .0161 .007 .022 .015 .004 .004 .001 O4 .6163 .2760 .5289 .0185 .019 .018 .018 .009 .010 .011 H1 .3293 -.0866 .0590 .5 .05 H2 .4247 .1520 .0594 .5 .05