Rammelsbergite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R061021
      Kjekshus A, Peterzens P G, Rakke T, Andresen A F
      Acta Chemica Scandinavica A33 (1979) 469-480
      Compounds with the marcasite type crystal structure. XIII. Structural and
      magnetic properties of CrtFe1-tAs2, CrtFe1-tSb2, Fe1-tNitAs2 and Fe1-tNitSb2
      Locality: synthetic
      Sample: NiAs2

      CELL PARAMETERS:   4.776149   5.793114   3.520935   90.00000   90.00000   90.00000
      SPACE GROUP: Pnnm
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                24.13         13.45        3.6852    1   1   0
                29.67         11.06        3.0088    0   1   1
                30.85          8.90        2.8966    0   2   0
                31.54         72.41        2.8341    1   0   1
                35.23        100.00        2.5458    1   1   1
                36.24         84.55        2.4767    1   2   0
                37.64          6.69        2.3881    2   0   0
                40.84         11.42        2.2078    2   1   0
                44.70         15.69        2.0257    1   2   1
                48.64         73.01        1.8705    2   1   1
                49.42          8.18        1.8426    2   2   0
                50.97         13.86        1.7903    1   3   0
                51.90         32.09        1.7605    0   0   2
                54.13         39.22        1.6931    0   3   1
                56.31         15.66        1.6326    2   2   1
                57.72         15.92        1.5958    1   3   1
                58.01          1.82        1.5885    1   1   2
                60.24         16.93        1.5351    3   1   0
                61.60          1.97        1.5044    0   2   2
                61.73          2.26        1.5016    2   3   0
                64.26          2.73        1.4483    0   4   0
                64.15          2.39        1.4506    3   0   1
                64.94         27.87        1.4349    1   2   2
                65.86          2.62        1.4170    2   0   2
                66.38          5.66        1.4072    3   1   1
                67.02          5.05        1.3952    3   2   0
                67.79          1.59        1.3812    2   3   1
                68.06          4.58        1.3765    2   1   2
                72.87          4.18        1.2971    3   2   1
                74.48          3.98        1.2729    2   2   2
                75.71          7.24        1.2552    1   3   2
                76.93         12.62        1.2383    2   4   0
                80.35          2.05        1.1940    4   0   0
                82.40          3.35        1.1695    4   1   0
                83.23          2.04        1.1598    3   3   1
                83.48         11.78        1.1570    3   1   2
                85.04          3.12        1.1397    1   0   3
                84.79          1.70        1.1424    2   3   2
                86.33          1.92        1.1260    1   5   0
                87.07          6.19        1.1183    1   1   3
                87.06          2.33        1.1184    0   4   2
                88.84          5.29        1.1006    0   5   1
                89.57          4.36        1.0934    3   2   2
                89.57          4.36        1.0934    3   2   2
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.