Hematite-proto
      Gualtieri A, Venturelli P
      American Mineralogist 84 (1999) 895-904
      In situ study of the goethite-hematite phase transformation by real time
      synchrotron powder diffraction
      Sample at T = 517 C
      _database_code_amcsd 0002229

      CELL PARAMETERS:    5.0258   5.0258  13.7090   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    299.880
      Density (g/cm3):      5.121
      MAX. ABS. INTENSITY / VOLUME**2:      40.75256809    
      RIR:      2.591
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                24.22         30.23        3.6743    0   1   2         6
                33.27        100.00        2.6927    1   0   4         6
                35.73         66.83        2.5129    1   1   0         6
                39.44          2.14        2.2848    0   0   6         2
                40.99         17.72        2.2019    1   1   3        12
                43.64          2.82        2.0742    2   0   2         6
                49.62         23.29        1.8372    0   2   4         6
                54.26         32.29        1.6905    1   1   6        12
                57.62          1.90        1.5997    1   2   2        12
                57.83          3.47        1.5945    0   1   8         6
                62.64         14.24        1.4831    2   1   4        12
                64.20         15.23        1.4508    3   0   0         6
                69.86          1.08        1.3463    2   0   8         6
                72.25          4.23        1.3076    1   0  10         6
                81.02          1.02        1.1867    1   2   8        12
                83.31          1.78        1.1599    0   2  10         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.