Trechmannite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R130062
      Matsumoto T, Nowacki W
      Zeitschrift fur Kristallographie 129 (1969) 163-177
      The crystal structure of trechmannite, AgAsS2
      Locality: Lengenbach quarry, Binnatal, Canton Wallis, Switzerland
      _database_code_amcsd 0010682

      CELL PARAMETERS:  14.0030 14.0030  9.1430   90.000   90.000  120.000
      SPACE GROUP: R-3       

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Ag     0.33300   0.08220   0.98800     1.000     2.385
            As     0.62220   0.17000   0.02270     1.000     1.710
            S      0.36080   0.11010   0.49960     1.000     1.399
            S      0.62430   0.17520   0.52190     1.000     1.446

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/- 11 +/- 11 +/-  8
            MAX. ABS. INTENSITY / VOLUME**2:      95.57685502    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                12.64         10.58        7.0015    1   1   0
                17.55          1.75        5.0532    0   2   1
                20.77         13.91        4.2777    0   1   2
                21.69          3.82        4.0975    3  -1   1
                24.38         13.82        3.6503    2   0   2
                25.44          1.15        3.5008    2   2   0
                27.56          7.16        3.2368   -1   3   2
                28.27         44.40        3.1566   -1   4   1
                28.27          3.07        3.1566    1   3   1
                29.30         11.87        3.0477    0   0   3
                32.03          3.21        2.7944    2  -1   3
                33.07         99.01        2.7092    3   1   2
                33.67          1.11        2.6616    3   2   1
                33.87         12.01        2.6463    4   1   0
                35.53          1.06        2.5266    0   4   2
                36.94          1.14        2.4335    3   0   3
                37.86          4.00        2.3766   -2   5   2
                38.58          3.08        2.3338    3   3   0
                40.58          2.00        2.2230    2   4   1
                44.21          2.17        2.0487    6  -2   2
                44.21          1.07        2.0487    4   2   2
                44.28          1.34        2.0455    3  -1   4
                46.78         21.72        1.9419    2   5   0
                46.78          3.51        1.9419    5   2   0
                48.13          4.05        1.8905    1   3   4
                48.13         24.62        1.8905   -1   4   4
                49.97          3.21        1.8251    4   0   4
                51.76          3.88        1.7661    3   2   4
                53.45          2.32        1.7144    7  -1   2
                55.56          4.55        1.6540    6   2   1
                56.16          4.09        1.6377    7  -2   3
                56.16          4.25        1.6377    2   5   3
                56.83          3.05        1.6200    8  -3   2
                56.83          1.62        1.6200    0   7   2
                56.89          1.81        1.6184    2   4   4
                57.35          3.24        1.6065    3   1   5
                58.48          7.31        1.5783   -2   8   2
                58.48          4.07        1.5783    2   6   2
                58.54          1.02        1.5768    5   1   4
                60.61          2.35        1.5279    6   3   0
                60.78          3.33        1.5238    0   0   6
                62.36          1.02        1.4890    2  -1   6
                66.32          1.02        1.4094    7   2   2
                69.38          3.08        1.3546    6   2   4
                71.43          1.72        1.3205   -1   5   6
                74.34          1.28        1.2759    6  -3   6
                75.51          1.05        1.2591    1   9   1
                76.65          1.73        1.2432   -2   9   4
                78.02          1.31        1.2248    5   6   2
                78.02          1.18        1.2248   10  -1   2
                80.04          1.62        1.1988    7  -2   6
                80.04          1.74        1.1988    2   5   6
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.