Magnesite
      Bromiley F A, Boffa Ballaran T, Langenhorst F, Seifert F
      American Mineralogist 92 (2007) 829-836
      Order and miscibility in the otavite - magnesite solid solution
      Locality: synthetic
      Sample: X_Mg = .9, synthesized at 800 C, 1 GPa, 1 h
      _database_code_amcsd 0004346

      CELL PARAMETERS:    4.6638   4.6638  15.1720   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    285.794
      Density (g/cm3):      3.246
      MAX. ABS. INTENSITY / VOLUME**2:      20.65807865    
      RIR:      2.072
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                24.98          7.67        3.5651    0   1   2         6
                32.38        100.00        2.7649    1   0   4         6
                35.50          5.08        2.5287    0   0   6         2
                38.61         10.18        2.3319    1   1   0         6
                42.70         32.91        2.1176    1   1   3        12
                46.54         14.51        1.9515    2   0   2         6
                51.25          5.98        1.7826    0   2   4         6
                53.37         15.62        1.7167    0   1   8         6
                53.45         22.24        1.7142    1   1   6        12
                61.00          2.88        1.5189    2   1   1        12
                62.01          7.73        1.4966    1   2   2        12
                65.96          5.45        1.4162    2   1   4        12
                67.79          1.98        1.3825    2   0   8         6
                68.71          3.47        1.3662    1   1   9        12
                68.85          1.56        1.3637    1   2   5        12
                69.86          8.31        1.3463    3   0   0         6
                75.14          2.85        1.2643    0   0  12         2
                78.92          1.62        1.2130    0   2  10         6
                80.82          2.34        1.1892    1   2   8        12
                87.83          1.03        1.1115    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.