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

      CELL PARAMETERS:    5.4750  16.8650   6.9150   90.000   99.800   90.000
      SPACE GROUP: P2_1/c    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    629.185
      Density (g/cm3):      3.382
      MAX. ABS. INTENSITY / VOLUME**2:      18.29616451    
      RIR:      1.762
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                10.49        100.00        8.4325    0   2   0         2
                14.02          3.12        6.3179    0   1   1         4
                16.43         37.68        5.3951    1   0   0         2
                17.26         17.10        5.1386    1   1   0         4
                19.53          7.73        4.5446    1   2   0         4
                19.88         17.21        4.4655   -1   1   1         4
                20.48         37.87        4.3364    0   3   1         4
                21.07         24.84        4.2162    0   4   0         2
                22.85         13.50        3.8925    1   3   0         4
                23.31          3.08        3.8161    1   1   1         4
                24.83         14.23        3.5854    0   4   1         4
                24.91          2.46        3.5743   -1   3   1         4
                25.06         14.71        3.5530    1   2   1         4
                26.16         21.19        3.4070    0   0   2         2
                26.69         10.37        3.3396    0   1   2         4
                26.84         13.78        3.3221    1   4   0         4
                27.76          8.86        3.2142    1   3   1         4
                28.63          9.59        3.1176   -1   4   1         4
                29.00         28.33        3.0788   -1   1   2         4
                29.55         18.40        3.0229    0   5   1         4
                30.45         13.79        2.9355   -1   2   2         4
                30.68         34.98        2.9137    0   3   2         4
                31.16          5.03        2.8700    1   4   1         4
                31.27          2.50        2.8600    1   5   0         4
                31.84          2.65        2.8108    0   6   0         2
                32.74         35.35        2.7356   -1   3   2         4
                32.85         10.26        2.7264   -1   5   1         4
                33.21         12.38        2.6976    2   0   0         2
                33.41         25.07        2.6820    1   0   2         2
                33.65         18.87        2.6637    2   1   0         4
                33.84          1.99        2.6487    1   1   2         4
                34.02          1.87        2.6356   -2   1   1         4
                34.52         10.18        2.5984    0   6   1         4
                34.92          6.19        2.5693    2   2   0         4
                35.11          6.17        2.5561    1   5   1         4
                35.11          1.09        2.5558    1   2   2         4
                35.28          1.30        2.5441   -2   2   1         4
                35.72          4.95        2.5139   -1   4   2         4
                36.03         11.97        2.4928    1   6   0         4
                36.96          3.96        2.4320    2   3   0         4
                37.14          1.00        2.4206    1   3   2         4
                37.30          4.86        2.4106   -2   3   1         4
                37.43          2.39        2.4028   -1   6   1         4
                38.29          7.29        2.3505    2   1   1         4
                39.28          3.81        2.2939   -2   1   2         4
                39.44          2.63        2.2849    2   2   1         4
                39.46         22.60        2.2838    1   6   1         4
                39.68          1.94        2.2715    0   7   1         4
                39.84          3.66        2.2630    1   4   2         4
                39.99          6.14        2.2548   -2   4   1         4
                40.75         17.76        2.2144   -1   1   3         4
                41.03          1.08        2.1999    1   7   0         4
                41.29          3.14        2.1868    2   3   1         4
                41.66          1.40        2.1682    0   6   2         4
                41.83          1.30        2.1593   -1   2   3         4
                42.21          5.67        2.1409   -2   3   2         4
                42.29          2.34        2.1373   -1   7   1         4
                42.90          2.58        2.1081    0   8   0         2
                42.95          2.79        2.1060    0   3   3         4
                43.23          3.23        2.0927   -2   5   1         4
                43.60          2.80        2.0759   -1   3   3         4
                43.77          6.90        2.0684    2   4   1         4
                44.65          1.44        2.0295   -2   4   2         4
                45.01          1.70        2.0139    0   8   1         4
                45.98          1.95        1.9739   -1   4   3         4
                46.23         10.08        1.9635    1   8   0         4
                46.25          1.73        1.9631    1   1   3         4
                46.35          3.05        1.9589    2   0   2         2
                46.68          3.94        1.9458    2   1   2         4
                47.62          1.56        1.9095   -1   7   2         4
                47.64          2.07        1.9089   -2   5   2         4
                48.31          1.45        1.8840    0   5   3         4
                48.84          1.93        1.8647    1   3   3         4
                49.04          6.02        1.8577   -2   2   3         4
                49.07          1.02        1.8564    1   8   1         4
                50.31          2.19        1.8135    2   6   1         4
                50.51          2.38        1.8068    0   9   1         4
                50.81          2.23        1.7969    2   7   0         4
                51.44          7.78        1.7765    2   4   2         4
                51.45          3.22        1.7760   -3   2   1         4
                52.31          1.98        1.7488   -1   6   3         4
                52.31          3.93        1.7488   -1   8   2         4
                52.69         10.68        1.7371   -1   9   1         4
                52.74          1.24        1.7357   -2   4   3         4
                53.50          1.98        1.7129    3   3   0         4
                53.59          1.96        1.7102   -1   0   4         2
                53.75          1.71        1.7053    1   5   3         4
                53.88          2.09        1.7015   -1   1   4         4
                54.14          3.60        1.6939    2   5   2         4
                54.59          1.09        1.6811   -3   2   2         4
                55.04          4.01        1.6685   -3   4   1         4
                55.27          2.25        1.6620    3   1   1         4
                55.56          1.26        1.6542    3   4   0         4
                55.61          9.71        1.6527    0   7   3         4
                56.05          3.78        1.6408   -3   3   2         4
                56.19          3.01        1.6371    0  10   1         4
                56.22          3.41        1.6362   -1   3   4         4
                56.44          4.13        1.6303    0   3   4         4
                56.95          2.21        1.6168    1   6   3         4
                57.33          2.66        1.6071    2   6   2         4
                57.57          4.36        1.6010    3   3   1         4
                58.05          9.00        1.5890   -3   4   2         4
                58.22          2.41        1.5847   -1  10   1         4
                58.43          3.38        1.5795    0   4   4         4
                58.43          1.11        1.5794    2   2   3         4
                58.54          4.95        1.5767   -2   6   3         4
                59.28          3.11        1.5588   -2   8   2         4
                59.54          4.54        1.5527    3   4   1         4
                59.69          7.95        1.5491    1  10   1         4
                59.91          3.79        1.5439    1   1   4         4
                60.20          5.14        1.5372   -3   1   3         4
                60.36          2.24        1.5335   -2   9   1         4
                60.37          1.00        1.5332   -1   8   3         4
                60.55          1.47        1.5291   -3   5   2         4
                60.60          1.12        1.5281    1   7   3         4
                60.96          1.62        1.5199    2   7   2         4
                61.03          1.05        1.5184   -3   2   3         4
                61.18          1.43        1.5149    3   6   0         4
                61.33          1.18        1.5115    0  10   2         4
                62.01          4.44        1.4967    3   5   1         4
                62.10          6.93        1.4947    1   3   4         4
                62.13          4.92        1.4941   -2   7   3         4
                62.35          2.79        1.4892    3   0   2         2
                63.37          3.35        1.4678   -2   4   4         4
                63.43          1.31        1.4665    3   2   2         4
                63.98          1.37        1.4552    1   4   4         4
                64.21          1.86        1.4506   -3   7   1         4
                64.46          9.03        1.4455    0   9   3         4
                64.95          1.34        1.4358    3   6   1         4
                65.36          1.82        1.4277    1  11   1         4
                65.75          2.00        1.4201   -2   5   4         4
                67.06          3.39        1.3957    2   6   3         4
                68.12          1.72        1.3764    0  12   1         4
                68.59          2.99        1.3682    3   8   0         4
                68.85          2.13        1.3637   -4   1   1         4
                68.88          2.17        1.3632   -2  10   2         4
                69.07          1.98        1.3599    1   9   3         4
                69.61          4.52        1.3505   -4   2   1         4
                69.95          1.38        1.3448   -1  12   1         4
                70.40          1.68        1.3374    2   7   3         4
                70.50          2.03        1.3357   -2   9   3         4
                70.81          2.94        1.3306   -3   8   2         4
                70.97          1.22        1.3281   -1   8   4         4
                71.29          2.58        1.3229    1  12   1         4
                72.39          2.16        1.3055   -2   1   5         4
                72.46          2.67        1.3044    2   3   4         4
                72.50          1.09        1.3038    1   7   4         4
                72.61          1.36        1.3020    3   1   3         4
                72.79          1.00        1.2992    0  12   2         4
                73.75          1.14        1.2846    4   4   0         4
                74.91          1.60        1.2676    4   2   1         4
                75.49          1.52        1.2593   -3   5   4         4
                76.83          2.15        1.2407   -4   5   2         4
                77.07          2.01        1.2374   -1   6   5         4
                79.21          1.15        1.2093    2  12   1         4
                81.18          1.09        1.1849   -3   1   5         4
                81.22          1.14        1.1843    3   6   3         4
                81.36          1.58        1.1827   -3   7   4         4
                81.73          1.40        1.1783   -4   5   3         4
                82.71          1.83        1.1667   -2  13   1         4
                82.97          1.34        1.1637    2  10   3         4
                85.46          1.44        1.1361    4   8   0         4
                85.50          1.78        1.1357    0   0   6         2
                86.60          1.40        1.1241    1   7   5         4
                86.96          1.25        1.1204   -3   5   5         4
                87.04          1.10        1.1196    4   5   2         4
                89.46          1.05        1.0954   -2  11   4         4
                89.50          1.39        1.0950   -4   5   4         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.