Marcasite
      Rieder M, Crelling J C, Sustai O, Drabek M, Weiss Z, Klementova M
      International Journal of Coal Geology 71 (2007) 115-121
      Arsenic in iron disulfides in a brown coal from the North Bohemian Basin,
      Czech Republic
      Locality: Dul CSA mine, North Bohemian Basin, Czech Republic
      Sample: Natural As-marcasite
      _database_code_amcsd 0012727

      CELL PARAMETERS:    4.4490   5.4320   3.3910   90.000   90.000   90.000
      SPACE GROUP: Pnnm      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     81.950
      Density (g/cm3):      5.556
      MAX. ABS. INTENSITY / VOLUME**2:      38.16780574    
      RIR:      2.237
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                25.89         47.65        3.4419    1   1   0         4
                32.98         29.85        2.7160    0   2   0         2
                33.22        100.00        2.6969    1   0   1         4
                37.22         59.93        2.4156    1   1   1         8
                38.85         55.20        2.3182    1   2   0         4
                43.99          5.97        2.0586    2   1   0         4
                47.51         30.82        1.9137    1   2   1         8
                51.97         72.39        1.7597    2   1   1         8
                53.23          8.07        1.7209    2   2   0         4
                54.09         26.63        1.6955    0   0   2         2
                54.73         13.72        1.6771    1   3   0         4
                57.72         25.44        1.5972    0   3   1         4
                60.31          7.95        1.5346    2   2   1         8
                60.91          4.99        1.5210    1   1   2         8
                61.70         12.30        1.5033    1   3   1         8
                64.82          4.97        1.4383    0   2   2         4
                65.21         14.06        1.4306    3   1   0         4
                66.59          1.62        1.4043    2   3   0         4
                68.57         13.80        1.3685    1   2   2         8
                71.59          2.31        1.3181    3   1   1         8
                72.18          1.89        1.3087    2   1   2         8
                72.64          2.33        1.3016    3   2   0         4
                78.75          3.05        1.2152    3   2   1         8
                79.33          2.93        1.2078    2   2   2         8
                80.57          5.55        1.1923    1   3   2         8
                83.38          7.69        1.1591    2   4   0         4
                87.75          1.47        1.1122    4   0   0         2
                89.45          2.43        1.0955    1   0   3         4
                89.67          8.22        1.0934    3   1   2         8
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.