Rickardite
      Forman S A, Peacock M A
      American Mineralogist 34 (1949) 441-451
      Crystal structure of rickardite, Cu4-xTe2
      _database_code_amcsd 0000047

      CELL PARAMETERS:    3.9800   3.9800   6.1200   90.000   90.000   90.000
      SPACE GROUP: P4/nmm    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     96.943
      Density (g/cm3):      7.418
      MAX. ABS. INTENSITY / VOLUME**2:      158.9081290    
      RIR:      6.975
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.47         15.78        6.1200    0   0   1         2
                26.72         80.26        3.3365    1   0   1         8
                29.18          8.69        3.0600    0   0   2         2
                31.80         19.20        2.8143    1   1   0         4
                35.10         45.00        2.5569    1   1   1         8
                37.06          7.79        2.4259    1   0   2         8
                43.70        100.00        2.0714    1   1   2         8
                44.41         13.27        2.0400    0   0   3         2
                45.59         49.15        1.9900    2   0   0         4
                48.08          2.68        1.8925    2   0   1         8
                50.26          7.41        1.8154    1   0   3         8
                53.62         20.14        1.7091    2   1   1        16
                55.05          5.09        1.6683    2   0   2         8
                60.14          3.31        1.5386    2   1   2        16
                60.51          5.78        1.5300    0   0   4         2
                65.34          3.99        1.4281    1   0   4         8
                65.53         14.16        1.4245    2   0   3         8
                66.44         13.62        1.4071    2   2   0         4
                70.17          4.85        1.3412    2   1   3        16
                72.97          3.57        1.2966    3   0   1         8
                74.17          1.90        1.2784    2   2   2         8
                75.54          2.49        1.2586    3   1   0         8
                77.42          6.52        1.2328    3   1   1        16
                78.93          9.21        1.2129    2   0   4         8
                82.95         23.06        1.1640    3   1   2        16
                83.28          3.65        1.1603    2   1   4        16
                83.45          6.30        1.1583    2   2   3         8
                86.76          8.99        1.1224    1   1   5         8
                87.76          1.23        1.1122    3   0   3         8
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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.