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: Run2 at T = 300 K, P = 5.44 GPa
      _database_code_amcsd 0008379

      CELL PARAMETERS:    4.1674   4.1674   4.1674   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     72.376
      Density (g/cm3):      3.698
      MAX. ABS. INTENSITY / VOLUME**2:      34.55706961    
      RIR:      3.043
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                37.38         11.20        2.4060    1   1   1         8
                43.43        100.00        2.0837    2   0   0         6
                63.10         50.03        1.4734    2   2   0        12
                75.69          6.35        1.2565    3   1   1        24
                79.71         13.53        1.2030    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.