Guanacoite Witzke T, Kolitsch U, Krause W, Wiechowski A, Medenbach O, Kampf A R, Steele I M, Favreau G European Journal of Mineralogy 18 (2006) 813-821 Guanacoite, Cu2Mg2(Mg0.5Cu0.5)(OH)4(H2O)4(AsO4)2, a new arsenate mineral species from the El Guanaco Mine, near Taltal, Chile: Description and crystal structure Locality: El Guanaco Mine, Taltal, Chile _database_code_amcsd 0007188 5.475 16.865 6.915 90 99.80 90 P2_1/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) Cu1 0 0 0 .504 .00995 .0083 .0107 .0109 .00063 .00163 .00220 MgCu1 0 0 0 .496 .00995 .0083 .0107 .0109 .00063 .00163 .00220 Cu2 .48613 .061215 .81351 .01084 .00813 .00980 .01437 .00096 .00132 .00045 Mg3 -.03662 .12866 .66179 .961 .0108 .0095 .0127 .0105 -.0001 .0024 -.0010 CuMg3 -.03662 .12866 .66179 .039 .0108 .0095 .0127 .0105 -.0001 .0024 -.0010 As .38336 .117186 .33611 .00885 .00849 .00944 .00868 -.00036 .00163 -.00005 O1 .3498 .04317 .1671 .0138 .0188 .0095 .0125 .0021 .0007 -.0023 O2 .6149 .09660 .5199 .0150 .0103 .0210 .0123 .0001 -.0018 .0028 O3 .1144 .13312 .4139 .0156 .0098 .0246 .0133 .0036 .0047 .0021 O4 .4383 .19887 .2077 .0139 .0169 .0101 .0155 -.0008 .0047 .0019 Oh5 .1484 .02198 .7504 .0114 .0111 .0106 .0124 -.0003 .0017 -.0026 Oh6 .8180 .10178 .9159 .0116 .0110 .0115 .0122 .0002 .0021 -.0019 Ow1 .3132 .16615 .8361 .0118 .0130 .0090 .0134 -.0006 .0024 .0015 Ow2 .8780 .25109 .1683 .0165 .0118 .0141 .0228 -.0016 .0010 .0036 H1 .137 -.007 .693 .029 H2 .817 .129 .971 .025 H3 .354 .203 .789 .029 H4 .340 .177 .963 .032 H5 .968 .224 .235 .033 H6 .735 .241 .178 .033