Tetrahedrite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R040164
      Peterson R C, Miller I
      Mineralogical Magazine 50 (1986) 717-721
      Crystal structure and cation distribution in freibergite and tetrahedrite
      Locality: Turquetil Lake, Northwest Territories, Canada

      CELL PARAMETERS:   10.36400   10.36400   10.36400   90.00000   90.00000   90.00000
      SPACE GROUP: I-43m
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                12.05          1.25        7.3818    1   1   0
                17.04          3.48        5.2197    2   0   0
                20.89          2.84        4.2619    2   1   1
                24.16          9.32        3.6909    2   2   0
                29.69        100.00        3.0136    2   2   2
                32.12          8.43        2.7901    3   2   1
                34.40         21.54        2.6099    4   0   0
                36.55          7.75        2.4606    4   1   1
                36.55          1.43        2.4606    3   3   0
                38.60          2.39        2.3343    4   2   0
                40.56          2.24        2.2257    3   3   2
                42.45          1.91        2.1309    4   2   2
                44.27          2.06        2.0474    5   1   0
                44.27          5.56        2.0474    4   3   1
                47.74          5.99        1.9060    5   2   1
                49.41         42.69        1.8455    4   4   0
                51.03          2.10        1.7904    4   3   3
                54.18          1.47        1.6935    5   3   2
                54.18          5.90        1.6935    6   1   1
                55.70          1.64        1.6506    6   2   0
                57.20          1.16        1.6108    5   4   1
                58.68         22.34        1.5738    6   2   2
                60.13          2.16        1.5392    6   3   1
                61.56          2.55        1.5068    4   4   4
                62.97          1.60        1.4764    5   4   3
                65.74          1.31        1.4206    6   3   3
                71.11          1.01        1.3258    6   5   1
                72.42          3.94        1.3049    8   0   0
                76.31          3.39        1.2478    6   5   3
                78.87          3.34        1.2136    8   3   1
                80.14          5.47        1.1975    6   6   2
                81.40          1.36        1.1820    7   5   2
                82.66          1.52        1.1672    8   4   0
                86.42          1.06        1.1257    7   6   1
                88.92          1.80        1.1004    8   5   1
                88.92          1.12        1.1004    7   5   4
                88.92          1.12        1.1004    7   5   4
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.