Trippkeite
      Zemann J
      Tschermaks Mineralogische und Petrographische Mitteilungen 2 (1951) 417-423
      Formel und kristallstruktur des trippkeits
      Note: coordinates of Cu and As corrected per Pertlik, 1975
      Locality: Copiapo, Chile
      _database_code_amcsd 0015632

      CELL PARAMETERS:    8.5900   8.5900   5.5600   90.000   90.000   90.000
      SPACE GROUP: P4_2/mbc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    410.262
      Density (g/cm3):      4.490
      MAX. ABS. INTENSITY / VOLUME**2:      65.31634911    
      RIR:      4.736
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.58         55.50        6.0740    1   1   0         4
                20.68         10.76        4.2950    2   0   0         4
                23.15          5.87        3.8416    2   1   0         8
                26.22          4.85        3.3990    2   0   1         8
                28.24        100.00        3.1605    2   1   1        16
                29.41         41.04        3.0370    2   2   0         4
                32.20          5.80        2.7800    0   0   2         2
                32.97         31.46        2.7164    3   1   0         8
                35.51         15.34        2.5278    1   1   2         8
                38.58         34.77        2.3338    2   0   2         8
                40.03         15.66        2.2521    2   1   2        16
                41.22          3.92        2.1899    3   2   1        16
                43.44          2.21        2.0834    4   1   0         8
                44.17          1.15        2.0506    2   2   2         8
                45.27          6.30        2.0033    4   0   1         8
                46.55         30.45        1.9509    4   1   1        16
                47.33          8.57        1.9208    4   2   0         8
                50.25          4.26        1.8155    4   2   1        16
                50.45          1.59        1.8090    3   2   2        16
                53.32          1.21        1.7180    4   3   0         8
                53.95          9.67        1.6995    4   0   2         8
                55.01         14.00        1.6692    2   1   3        16
                56.20         25.29        1.6366    3   3   2         8
                57.13          1.30        1.6123    5   1   1        16
                58.40          1.68        1.5803    4   2   2        16
                60.37          1.75        1.5333    5   2   1        16
                63.11          9.34        1.4732    5   3   0         8
                63.67          3.09        1.4614    4   3   2        16
                64.70         14.78        1.4407    5   1   2        16
                65.16          5.06        1.4317    6   0   0         4
                65.55          2.35        1.4240    5   3   1        16
                66.17          4.24        1.4122    6   1   0         8
                66.66          1.81        1.4031    4   0   3         8
                67.37          5.84        1.3900    0   0   4         2
                67.66          9.09        1.3847    4   1   3        16
                68.56          1.18        1.3687    6   1   1        16
                70.15          1.82        1.3415    5   4   0         8
                70.62          1.40        1.3337    4   2   3        16
                70.69          1.58        1.3327    4   4   2         8
                71.51          1.37        1.3194    6   2   1        16
                72.48          2.52        1.3041    5   4   1        16
                72.63          1.96        1.3017    5   3   2        16
                75.17          3.87        1.2639    2   2   4         8
                75.51          2.65        1.2591    6   1   2        16
                77.07          4.72        1.2374    3   1   4        16
                78.35          6.45        1.2203    6   2   2        16
                78.78          1.20        1.2148    7   1   0         8
                79.30          1.69        1.2082    5   4   2        16
                80.66          1.27        1.1912    6   4   0         8
                83.81          1.74        1.1542    7   2   1        16
                83.90          1.10        1.1532    5   3   3        16
                86.41          2.36        1.1261    4   2   4        16
                87.66          1.80        1.1132    5   5   2         8
                88.44          3.38        1.1054    7   3   1        16
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.