Freboldite
      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 0011564

      CELL PARAMETERS:    3.6294   3.6294   5.3006   90.000   90.000  120.000
      SPACE GROUP: P6_3mc    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     60.468
      Density (g/cm3):      7.572
      MAX. ABS. INTENSITY / VOLUME**2:      157.0703807    
      RIR:      6.754
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.40          8.13        3.1432    1   0   0         6
                33.14        100.00        2.7036    1   0   1         6
                33.82          1.01        2.6503    0   0   2         1
                44.73         88.98        2.0262    1   0   2         6
                50.28         59.36        1.8147    1   1   0         6
                60.07         16.14        1.5402    1   0   3         6
                61.55         14.90        1.5067    2   0   1         6
                61.98          1.32        1.4973    1   1   2         6
                69.54         20.02        1.3518    2   0   2         6
                71.15          6.13        1.3252    0   0   4         1
                82.07          6.08        1.1743    2   0   3         6
                83.37          3.89        1.1592    2   1   1        12
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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.