Magnesite
      Maslen E N, Streltsov V A, Streltsova N R, Ishizawa N
      Acta Crystallographica B51 (1995) 929-939
      Electron density and optical anisotropy in rhombohedral carbonates.
      III. Synchrotron X-ray studies of CaCO3, MgCO3 and MnCO3
      _database_code_amcsd 0009893

      CELL PARAMETERS:    4.6320   4.6320  15.0020   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    278.751
      Density (g/cm3):      3.013
      MAX. ABS. INTENSITY / VOLUME**2:      16.77287896    
      RIR:      1.813
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                32.69        100.00        2.7396    1   0   4         6
                35.92         13.22        2.5003    0   0   6         2
                38.89          6.10        2.3160    1   1   0         6
                43.04         50.64        2.1016    1   1   3        12
                46.89         13.27        1.9376    2   0   2         6
                51.68          5.26        1.7687    0   2   4         6
                53.97         23.55        1.6991    1   1   6        12
                53.98         18.19        1.6988    0   1   8         6
                61.47          5.01        1.5085    2   1   1        12
                62.50          7.52        1.4861    1   2   2        12
                66.52          6.19        1.4057    2   1   4        12
                68.50          2.12        1.3698    2   0   8         6
                69.46          2.96        1.3532    1   2   5        12
                69.48          6.86        1.3529    1   1   9        12
                70.42         13.18        1.3371    3   0   0         6
                76.14          4.83        1.2502    0   0  12         2
                77.05          1.93        1.2378    2   1   7        12
                79.84          1.96        1.2013    0   2  10         6
                81.67          3.19        1.1790    1   2   8        12
                88.98          1.25        1.1001    1   1  12        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.