Calaverite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R070397
      Schutte W J, de Boer J L
      Acta Crystallographica B44 (1988) 486-494
      Valence fluctuations in the incommensurately modulated structure of calaverite AuTe2
      Locality: Cripple Creek, Colorado
      Sample: T = 298 K

      CELL PARAMETERS:   7.1980  4.4140  5.0710   90.000   90.020   90.000
      SPACE GROUP: C2/m      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Au     0.00000   0.00000   0.00000     0.900     1.010
            Ag     0.00000   0.00000   0.00000     0.100     1.010
            Te     0.68940   0.00000   0.28880     1.000     3.584

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    0.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  6 +/-  4 +/-  4
            MAX. ABS. INTENSITY / VOLUME**2:      356.7218381    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                17.49         17.30        5.0710    0   0   1
                23.64         10.23        3.7628    1   1   0
                29.56        100.00        3.0215    1   1   1
                30.45         38.85        2.9354   -2   0   1
                30.46          1.53        2.9345    2   0   1
                40.89         18.77        2.2070    0   2   0
                42.90         29.02        2.1080    3   1   0
                43.01         24.31        2.1029   -1   1   2
                43.02          5.53        2.1025    1   1   2
                43.66          6.19        2.0731   -2   0   2
                43.68         14.47        2.0724    2   0   2
                44.79          3.40        2.0236    0   2   1
                46.66          7.96        1.9467   -3   1   1
                50.73          2.34        1.7995    4   0   0
                51.83         13.94        1.7640   -2   2   1
                54.08          6.72        1.6957    4   0   1
                54.27          4.80        1.6903    0   0   3
                59.99          4.98        1.5420   -1   1   3
                60.52          1.26        1.5298    2   0   3
                61.35          3.84        1.5110   -2   2   2
                61.37          8.34        1.5108    2   2   2
                63.37          1.99        1.4677   -4   0   2
                67.11          1.82        1.3947    4   2   0
                67.56          5.88        1.3866    1   3   1
                69.97          4.96        1.3446    4   2   1
                70.13          3.65        1.3420    0   2   3
                71.38          2.97        1.3215   -5   1   1
                71.39          1.16        1.3213    5   1   1
                71.54          2.15        1.3189   -3   1   3
                71.56          4.37        1.3185    3   1   3
                74.90          1.27        1.2677    0   0   4
                75.64          1.19        1.2573    2   2   3
                75.85          3.47        1.2543    3   3   0
                75.93          3.00        1.2532   -1   3   2
                77.46          1.41        1.2322   -4   0   3
                78.22          1.85        1.2221   -4   2   2
                78.56          1.33        1.2176   -3   3   1
                79.58          2.32        1.2046   -5   1   2
                79.61          3.11        1.2042    5   1   2
                79.84          2.02        1.2013    1   1   4
                79.97          1.11        1.1997    6   0   0
                88.63          1.09        1.1035    0   4   0
                89.06          1.42        1.0993    0   2   4
                89.31          1.24        1.0969   -1   3   3
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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.