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 = 48 h
      _database_code_amcsd 0004323

      CELL PARAMETERS:    4.7819   4.7819  15.6980   90.000   90.000  120.000
      SPACE GROUP: R-3       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    310.868
      Density (g/cm3):      4.114
      MAX. ABS. INTENSITY / VOLUME**2:      55.33969075    
      RIR:      4.380
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.94          1.03        5.2327    0   0   3         2
                22.20          2.34        4.0043    1   0   1         6
                24.30         43.73        3.6627    0   1   2         6
                31.40        100.00        2.8486    1   0   4         6
                35.89          2.54        2.5019    0   1   5         6
                37.62         24.74        2.3909    1   1   0         6
                41.53          2.63        2.1747    2  -1   3         6
                41.53          8.92        2.1747    1   1   3         6
                44.12          1.88        2.0528    0   2   1         6
                45.29         20.88        2.0021    2   0   2         6
                49.79         10.66        1.8314    0   2   4         6
                51.54         18.22        1.7733    0   1   8         6
                51.80         13.76        1.7650    1   1   6         6
                51.80         14.58        1.7650    2  -1   6         6
                59.33          1.35        1.5575    3  -1   1         6
                60.29          7.79        1.5350   -1   3   2         6
                60.29          5.80        1.5350    1   2   2         6
                63.36          3.10        1.4679    1   0  10         6
                64.04          4.22        1.4539    2   1   4         6
                64.04          5.44        1.4539    3  -1   4         6
                65.54          3.94        1.4243    2   0   8         6
                66.34          1.60        1.4091    2  -1   9         6
                66.78          1.30        1.4008   -1   3   5         6
                67.90          7.57        1.3804    3   0   0         6
                72.22          2.72        1.3082    0   0  12         2
                76.09          3.18        1.2509    0   2  10         6
                78.10          1.90        1.2236   -1   3   8         6
                78.10          2.62        1.2236    1   2   8         6
                78.31          1.07        1.2209    0   3   6         6
                78.31          1.06        1.2209    3   0   6         6
                84.40          1.36        1.1476    2  -1  12         6
                84.40          1.53        1.1476    1   1  12         6
                88.14          1.59        1.1084    3  -1  10         6
                88.14          1.88        1.1084    2   1  10         6
                88.75          1.08        1.1023    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.