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 = 1, synthesized at 600 C, 1 GPa, 3 h
      _database_code_amcsd 0004331

      CELL PARAMETERS:    4.6338   4.6338  15.0192   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    279.288
      Density (g/cm3):      3.007
      MAX. ABS. INTENSITY / VOLUME**2:      15.10777164    
      RIR:      1.636
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                32.66        100.00        2.7418    1   0   4         6
                35.87         13.79        2.5032    0   0   6         2
                38.87          5.49        2.3169    1   1   0         6
                43.02         50.31        2.1027    1   1   3        12
                46.87         12.00        1.9385    2   0   2         6
                51.65          4.55        1.7697    0   2   4         6
                53.92         15.75        1.7005    0   1   8         6
                53.92         20.81        1.7003    1   1   6        12
                61.44          4.19        1.5091    2   1   1        12
                62.47          5.81        1.4867    1   2   2        12
                66.48          4.72        1.4064    2   1   4        12
                68.44          1.54        1.3709    2   0   8         6
                69.41          5.75        1.3541    1   1   9        12
                69.41          2.33        1.3540    1   2   5        12
                70.38         10.41        1.3377    3   0   0         6
                76.04          3.60        1.2516    0   0  12         2
                76.99          1.44        1.2385    2   1   7        12
                79.76          1.30        1.2024    0   2  10         6
                81.60          2.07        1.1798    1   2   8        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.