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 = .5, synthesized at 500 C, 1 GPa, 96 h
      Sample: disordered at T = 600 C, t = 20 min
      _database_code_amcsd 0004322

      CELL PARAMETERS:    4.7822   4.7822  15.6910   90.000   90.000  120.000
      SPACE GROUP: R-3       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    310.768
      Density (g/cm3):      4.115
      MAX. ABS. INTENSITY / VOLUME**2:      55.42430031    
      RIR:      4.386
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.95          1.53        5.2303    0   0   3         2
                22.20          3.08        4.0044    1   0   1         6
                24.30         43.64        3.6625    0   1   2         6
                31.41        100.00        2.8480    1   0   4         6
                35.90          2.86        2.5012    0   1   5         6
                37.62         24.72        2.3911    1   1   0         6
                41.53          2.28        2.1746    2  -1   3         6
                41.53          9.59        2.1746    1   1   3         6
                44.11          2.12        2.0530    0   2   1         6
                45.29         20.86        2.0022    2   0   2         6
                49.79         10.67        1.8313    0   2   4         6
                51.56         18.26        1.7726    0   1   8         6
                51.81         13.69        1.7647    1   1   6         6
                51.81         14.51        1.7647    2  -1   6         6
                59.33          1.47        1.5576    3  -1   1         6
                60.29          7.78        1.5351   -1   3   2         6
                60.29          5.80        1.5351    1   2   2         6
                63.39          3.06        1.4673    1   0  10         6
                64.05          5.44        1.4539    3  -1   4         6
                64.05          4.22        1.4539    2   1   4         6
                65.55          3.96        1.4240    2   0   8         6
                66.36          1.68        1.4087    2  -1   9         6
                66.78          1.38        1.4008   -1   3   5         6
                67.90          7.57        1.3805    3   0   0         6
                72.25          2.73        1.3076    0   0  12         2
                76.11          3.15        1.2506    0   2  10         6
                78.12          2.63        1.2235    1   2   8         6
                78.12          1.91        1.2235   -1   3   8         6
                78.32          1.07        1.2208    0   3   6         6
                78.32          1.05        1.2208    3   0   6         6
                84.44          1.38        1.1472    2  -1  12         6
                84.44          1.55        1.1472    1   1  12         6
                88.16          1.86        1.1082    2   1  10         6
                88.16          1.58        1.1082    3  -1  10         6
                88.75          1.08        1.1024    1   3   4         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.