Periclase
      Zhang J
      Physics and Chemistry of Minerals 27 (2000) 145-148
      Effect of pressure on the thermal expansion of MgO up to 8.2 GPa
      Sample: Run1 at T = 300 K, P = 0.00 GPa, measured at the end of the experiments
      _database_code_amcsd 0008367

      CELL PARAMETERS:    4.2136   4.2136   4.2136   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     74.810
      Density (g/cm3):      3.578
      MAX. ABS. INTENSITY / VOLUME**2:      33.64927504    
      RIR:      3.062
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                36.95         11.00        2.4327    1   1   1         8
                42.93        100.00        2.1068    2   0   0         6
                62.33         50.46        1.4897    2   2   0        12
                74.72          6.34        1.2704    3   1   1        24
                78.66         13.65        1.2164    2   2   2         8
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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.