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