Pyrargyrite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050290
      Engel P, Nowacki W
      Neues Jahrbuch fur Mineralogie, Monatshefte 1966 (1966) 181-184
      Die verfeinerung der kristallstruktur von proustit, Ag3AsS3 und pyrargyrit, Ag3SbS3

      CELL PARAMETERS:   11.04000   11.04000   8.720000   90.00000   90.00000   120.0000
      SPACE GROUP: R3c
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                22.41         13.62        3.9694    0   1   2
                26.70         67.96        3.3398    2   1   1
                27.69         44.66        3.2231    2   0   2
                28.00         59.53        3.1882    3   0   0
                32.16        100.00        2.7836    1   2   2
                32.43         10.91        2.7610    2   2   0
                34.87         62.65        2.5734    1   1   3
                35.37         60.87        2.5380    1   3   1
                39.77         19.81        2.2666    3   1   2
                42.48         12.37        2.1280    3   2   1
                42.50          8.59        2.1268    1   0   4
                43.14          3.08        2.0969    0   4   2
                43.35          9.86        2.0871    4   1   0
                45.28          3.36        2.0025    2   2   3
                45.71          1.60        1.9847    0   2   4
                46.31         30.43        1.9603    2   3   2
                48.75         19.26        1.8677    2   1   4
                49.51          6.42        1.8407    3   3   0
                51.63          7.61        1.7699    2   4   1
                52.20         13.12        1.7519    5   0   2
                54.07          1.33        1.6957    1   4   3
                54.07          1.74        1.6957    4   1   3
                54.44         19.02        1.6849    1   3   4
                54.97         13.44        1.6699    4   2   2
                57.14          9.28        1.6116    4   0   4
                57.65          8.40        1.5984    1   5   2
                57.82          7.40        1.5941    6   0   0
                58.73          3.57        1.5716    1   2   5
                59.40          1.18        1.5554    3   3   3
                59.74          3.67        1.5475    4   3   1
                60.42         12.81        1.5315    5   2   0
                62.80          1.99        1.4793    3   4   2
                63.82          4.45        1.4579    3   1   5
                64.00          3.20        1.4543    0   0   6
                64.78          1.17        1.4386    1   6   1
                66.46          5.08        1.4063    1   1   6
                67.24          6.23        1.3918    2   4   4
                67.71          3.74        1.3833    6   1   2
                68.69          1.22        1.3658    2   3   5
                69.31          1.24        1.3552    5   2   3
                69.31          1.72        1.3552    2   5   3
                69.64          2.79        1.3496    5   1   4
                71.98          1.18        1.3113    6   2   1
                73.58          1.92        1.2867    2   2   6
                74.78          1.31        1.2690    2   6   2
                74.93          2.96        1.2668    7   1   0
                75.73          1.42        1.2555    4   2   5
                78.92          4.16        1.2125    1   6   4
                80.45          2.27        1.1932    4   1   6
                81.62          2.08        1.1790    4   5   2
                83.12          1.71        1.1615    1   7   3
                83.12          1.84        1.1615    7   1   3
                83.43          1.35        1.1580    3   5   4
                83.87          1.28        1.1531    8   0   2
                84.95          3.02        1.1411    3   3   6
                85.67          3.21        1.1333    6   2   4
                86.15          1.07        1.1282    1   3   7
                86.15          1.07        1.1282    1   3   7
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.