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 800 C, 1 GPa, 1 h
      _database_code_amcsd 0004347

      CELL PARAMETERS:    4.6334   4.6334  15.0178   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    279.214
      Density (g/cm3):      3.008
      MAX. ABS. INTENSITY / VOLUME**2:      14.97155055    
      RIR:      1.621
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                32.66        100.00        2.7415    1   0   4         6
                35.88         13.77        2.5030    0   0   6         2
                38.87          5.49        2.3167    1   1   0         6
                43.02         49.88        2.1025    1   1   3        12
                46.87         11.82        1.9383    2   0   2         6
                51.66          4.50        1.7695    0   2   4         6
                53.92         15.51        1.7004    0   1   8         6
                53.93         20.37        1.7002    1   1   6        12
                61.45          4.08        1.5090    2   1   1        12
                62.47          5.62        1.4866    1   2   2        12
                66.49          4.61        1.4062    2   1   4        12
                68.44          1.51        1.3708    2   0   8         6
                69.41          5.55        1.3540    1   1   9        12
                69.42          2.26        1.3538    1   2   5        12
                70.39         10.09        1.3375    3   0   0         6
                76.05          3.46        1.2515    0   0  12         2
                77.00          1.38        1.2384    2   1   7        12
                79.77          1.23        1.2023    0   2  10         6
                81.61          1.99        1.1797    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.