Chromium
      Bradley A J, Ollard E F
      Nature 117 (1926) 122-122
      Allotropy of chromium
      Locality: synthetic
      _database_code_amcsd 0014671

      CELL PARAMETERS:    2.7140   2.7140   4.4100   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     28.131
      Density (g/cm3):      6.138
      MAX. ABS. INTENSITY / VOLUME**2:      143.3540304    
      RIR:      7.605
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                38.29         25.31        2.3504    1   0   0         6
                40.93         27.36        2.2050    0   0   2         2
                43.64        100.00        2.0742    1   0   1        12
                57.29         12.92        1.6081    1   0   2        12
                69.24         12.90        1.3570    1   1   0         6
                76.42         13.66        1.2463    1   0   3        12
                81.99          1.81        1.1752    2   0   0         6
                83.68         13.61        1.1557    1   1   2        12
                85.51          9.59        1.1356    2   0   1        12
                88.73          1.93        1.1025    0   0   4         2
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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.