Tetrahedrite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050302
      Foit F F, Hughes J M
      American Mineralogist 89 (2004) 159-163
      Structural variations in mercurian tetrahedrite
      Sample A2 from the Spring Creek Claims in Harney County, Oregon

      CELL PARAMETERS:   10.33100   10.33100   10.33100   90.00000   90.00000   90.00000
      SPACE GROUP: I-43m
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                17.23          1.31        5.1651    2   0   0
                21.13          3.74        4.2173    2   1   1
                24.43          5.46        3.6523    2   2   0
                30.02        100.00        2.9821    2   2   2
                32.48          6.79        2.7609    3   2   1
                34.79         21.39        2.5826    4   0   0
                36.97          5.44        2.4349    4   1   1
                36.97          2.05        2.4349    3   3   0
                39.04          1.10        2.3099    4   2   0
                41.02          1.47        2.2024    3   3   2
                42.93          1.13        2.1086    4   2   2
                44.77          1.42        2.0259    5   1   0
                44.77          4.76        2.0259    4   3   1
                48.29          6.21        1.8860    5   2   1
                49.98         42.52        1.8261    4   4   0
                51.62          1.55        1.7716    4   3   3
                54.81          1.22        1.6758    5   3   2
                54.81          4.89        1.6758    6   1   1
                56.36          1.30        1.6334    6   2   0
                59.37         22.48        1.5573    6   2   2
                60.84          1.26        1.5231    6   3   1
                62.29          2.66        1.4910    4   4   4
                63.72          1.18        1.4609    5   4   3
                73.32          3.90        1.2913    8   0   0
                77.28          2.76        1.2347    6   5   3
                79.88          2.36        1.2009    8   3   1
                81.17          5.38        1.1850    6   6   2
                83.74          1.76        1.1550    8   4   0
                83.74          1.76        1.1550    8   4   0
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.