Goldfieldite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R070423
      Pohl D, Liessmann W, Okrugin V M
      Neues Jahrbuch fur Mineralogie, Monatshefte 1996 (1996) 1-8
      Rietveld analysis of selenium-bearing goldfieldites
      Locality: Ozernoya deposit, Kamchatka, Russia

      CELL PARAMETERS:  10.3340 10.3340 10.3340   90.000   90.000   90.000
      SPACE GROUP: I-43m     

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Cu     0.25000   0.50000   0.00000     0.850     0.700
            Cu     0.20900   0.00000   0.00000     0.983     0.700
            Te     0.26280   0.26280   0.26280     0.625     1.000
            Sb     0.26280   0.26280   0.26280     0.250     1.000
            As     0.26280   0.26280   0.26280     0.125     0.600
            S      0.12000   0.12000   0.36000     0.940     1.000
            Se     0.12000   0.12000   0.36000     0.060     0.600
            S      0.00000   0.00000   0.00000     0.700     1.000

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    0.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  9 +/-  9 +/-  9
            MAX. ABS. INTENSITY / VOLUME**2:      127.2998160    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                12.11          2.55        7.3072    1   1   0
                17.16          6.15        5.1670    2   0   0
                21.06          2.36        4.2188    2   1   1
                24.36         11.40        3.6536    2   2   0
                29.95        100.00        2.9832    2   2   2
                32.42          5.54        2.7619    3   2   1
                34.72         18.85        2.5835    4   0   0
                36.90          5.32        2.4357    4   1   1
                36.90          2.83        2.4357    3   3   0
                38.98          3.68        2.3108    4   2   0
                40.96          4.05        2.2032    3   3   2
                42.87          2.03        2.1094    4   2   2
                44.72          3.68        2.0267    5   1   0
                44.72          5.23        2.0267    4   3   1
                48.23          6.36        1.8867    5   2   1
                49.92         46.50        1.8268    4   4   0
                51.57          1.63        1.7723    4   3   3
                53.18          2.44        1.7223    4   4   2
                54.76          5.17        1.6764    6   1   1
                56.30          3.25        1.6339    6   2   0
                57.82          1.37        1.5946    5   4   1
                59.32         26.37        1.5579    6   2   2
                60.79          1.00        1.5237    6   3   1
                62.24          2.57        1.4916    4   4   4
                63.67          1.15        1.4614    5   4   3
                63.67          1.46        1.4614    5   5   0
                67.87          1.68        1.3809    6   4   2
                71.95          1.54        1.3124    7   3   2
                71.95          1.48        1.3124    6   5   1
                73.28          5.04        1.2917    8   0   0
                74.61          1.18        1.2720    5   5   4
                77.24          2.95        1.2351    6   5   3
                79.84          2.52        1.2013    8   3   1
                79.84          1.68        1.2013    7   4   3
                81.14          6.75        1.1854    6   6   2
                83.71          1.97        1.1554    8   4   0
                84.99          1.59        1.1412    8   3   3
                86.27          1.42        1.1275    8   4   2
                87.55          1.60        1.1143    6   5   5
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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.