As Fe2
      Elander M, Haegg G, Westgren A
      Arkiv for Kemi, Mineralogi och Geologi B12 (1935) 1-6
      The crystal structure of Cu2 Sb and Fe2 As
      _cod_database_code 1011298
      _database_code_amcsd 0018145

      CELL PARAMETERS:    3.6270   3.6270   5.9730   90.000   90.000   90.000
      SPACE GROUP: P4/nmm    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     78.576
      Density (g/cm3):      7.886
      MAX. ABS. INTENSITY / VOLUME**2:      128.9901499    
      RIR:      5.326
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.83         10.83        5.9730    0   0   1         2
                28.80          9.26        3.1002    1   0   1         8
                29.92          7.87        2.9865    0   0   2         2
                34.99         25.98        2.5647    1   1   0         4
                38.19         59.96        2.3566    1   1   1         8
                39.07          7.73        2.3055    1   0   2         8
                45.56         18.72        1.9910    0   0   3         2
                46.68        100.00        1.9457    1   1   2         8
                50.31         53.65        1.8135    2   0   0         4
                52.43         12.80        1.7453    1   0   3         8
                52.75          1.23        1.7353    2   0   1         8
                59.01          2.75        1.5654    2   1   1        16
                59.65          4.23        1.5501    2   0   2         8
                62.16          3.95        1.4933    0   0   4         2
                65.48          2.51        1.4254    2   1   2        16
                70.20         16.62        1.3407    2   0   3         8
                73.91         14.26        1.2823    2   2   0         4
                75.62          7.83        1.2575    2   1   3        16
                81.73          1.64        1.1783    2   2   2         8
                83.94          5.98        1.1528    2   0   4         8
                84.47          3.38        1.1470    3   1   0         8
                85.60          6.75        1.1346    1   0   5         8
                86.38          7.64        1.1264    3   1   1        16
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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.