Crookesite
      Eriksson L, Werner P E, Berger R, Meerschaut A
      Journal of Solid State Chemistry 90 (1991) 61-68
      Structure refinement of TlCu7Se4 from X-ray powder profile data
      Locality: synthetic
      Sample: STADI/P
      Note: Cell parameters are an average of Table 1 values
      _database_code_amcsd 0013692

      CELL PARAMETERS:   10.4500  10.4500   3.9708   90.000   90.000   90.000
      SPACE GROUP: I4/m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    433.621
      Density (g/cm3):      7.390
      MAX. ABS. INTENSITY / VOLUME**2:      95.39671869    
      RIR:      4.203
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                11.98          1.27        7.3893    1   1   0         4
                16.97         14.96        5.2250    2   0   0         4
                23.97          5.31        3.7119    1   0   1         8
                24.09          3.43        3.6946    2   2   0         4
                26.98          8.23        3.3046    1   3   0         4
                26.98         62.36        3.3046    3   1   0         4
                29.52         33.06        3.0260    2   1   1         8
                29.52         66.94        3.0260    1   2   1         8
                34.24         70.72        2.6186    3   0   1         8
                34.33         27.99        2.6125    4   0   0         4
                36.48         15.60        2.4631    3   3   0         4
                38.45         28.63        2.3410    3   2   1         8
                38.45         14.98        2.3410    2   3   1         8
                38.53          1.59        2.3367    2   4   0         4
                38.53          7.50        2.3367    4   2   0         4
                42.30          4.89        2.1364    1   4   1         8
                42.30         67.97        2.1364    4   1   1         8
                44.19          6.65        2.0494    5   1   0         4
                45.70         43.42        1.9854    0   0   2         2
                49.09          1.93        1.8559    2   0   2         8
                49.27         35.68        1.8495    5   0   1         8
                49.27         27.68        1.8495    4   3   1         8
                50.96         50.92        1.7922    3   5   0         4
                52.49         16.86        1.7435    5   2   1         8
                53.87         16.74        1.7019    3   1   2         8
                53.87          2.18        1.7019    1   3   2         8
                55.62          3.14        1.6523    6   2   0         4
                58.38         10.97        1.5807    4   0   2         8
                58.54         11.44        1.5767    1   6   1         8
                58.54          6.32        1.5767    6   1   1         8
                59.83          6.58        1.5458    3   3   2         8
                61.26          3.59        1.5130    4   2   2         8
                61.42          4.13        1.5095    5   4   1         8
                62.89          1.54        1.4779    1   7   0         4
                62.89          1.90        1.4779    5   5   0         4
                64.23          3.77        1.4502    3   6   1         8
                64.23          4.45        1.4502    6   3   1         8
                64.28          1.96        1.4492    6   4   0         4
                65.45          3.74        1.4260    5   1   2         8
                66.97          1.66        1.3974    7   0   1         8
                70.83         33.22        1.3303    3   5   2         8
                72.34          2.08        1.3062    8   0   0         4
                74.51          1.94        1.2735    2   1   3         8
                74.51          4.20        1.2735    1   2   3         8
                74.75          2.37        1.2700    6   2   2         8
                74.89          3.20        1.2679    5   6   1         8
                74.89          2.28        1.2679    6   5   1         8
                74.94          4.01        1.2672    2   8   0         4
                74.94         11.48        1.2672    8   2   0         4
                77.08          5.00        1.2373    3   0   3         8
                77.46          4.28        1.2322    4   7   1         8
                77.51          2.54        1.2315    6   6   0         4
                78.78          2.33        1.2148    7   5   0         4
                79.63          2.58        1.2040    3   2   3         8
                79.63          1.64        1.2040    2   3   3         8
                81.13          1.32        1.1855    1   7   2         8
                81.13          1.67        1.1855    5   5   2         8
                82.16          7.27        1.1732    4   1   3         8
                82.39          1.72        1.1705    6   4   2         8
                82.53          6.21        1.1689    3   8   1         8
                82.53          2.21        1.1689    8   3   1         8
                87.17          4.42        1.1182    4   3   3         8
                87.17          5.56        1.1182    5   0   3         8
                87.54          6.96        1.1144    9   0   1         8
                88.83          1.13        1.1015    3   9   0         4
                89.66          3.04        1.0935    5   2   3         8
                89.89          2.18        1.0912    8   0   2         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.