Breithauptite
      Wyckoff R W G
      Crystal Structures 1 (1963) 85-237
      Second edition. Interscience Publishers, New York, New York
      Note: ideal nickel arsenide structure
      _database_code_amcsd 0011581

      CELL PARAMETERS:    3.9400   3.9400   5.1400   90.000   90.000  120.000
      SPACE GROUP: P6_3mc    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     69.101
      Density (g/cm3):      8.672
      MAX. ABS. INTENSITY / VOLUME**2:      311.2539206    
      RIR:     11.687
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.47        100.00        2.8428    1   0   1         6
                34.91          3.40        2.5700    0   0   2         1
                44.11         53.79        2.0528    1   0   2         6
                46.07         51.16        1.9700    1   1   0         6
                56.86         15.99        1.6192    2   0   1         6
                59.09          3.95        1.5635    1   1   2         6
                60.46         12.94        1.5311    1   0   3         6
                65.69         13.91        1.4214    2   0   2         6
                73.73          3.41        1.2850    0   0   4         1
                76.09         11.78        1.2509    2   1   1        12
                79.24          5.17        1.2089    2   0   3         6
                83.95         12.24        1.1527    2   1   2        12
                85.34          6.45        1.1374    3   0   0         6
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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.