Periclase
      Matsui M, Ito E, Yamazaki D, Yoshino T, Guo X, Shan S, Higo Y, Funakoshi F I
      American Mineralogist 97 (2012) 176-183
      Static compression of (Mg0.83,Fe0.17)O and (Mg0.75,Fe0.25)O
      ferropericlase up to 58 GPa at 300, 700, and 1100 K
      Note: (Mg0.75,Fe0.25)O, T = 700 K, P = 50.28 GPa
      Locality: synthetic
      _database_code_amcsd 0020805

      CELL PARAMETERS:    3.9743   3.9743   3.9743   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     62.774
      Density (g/cm3):      4.831
      MAX. ABS. INTENSITY / VOLUME**2:      50.00924964    
      RIR:      3.370
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                39.26         23.52        2.2946    1   1   1         8
                45.65        100.00        1.9871    2   0   0         6
                66.55         48.70        1.4051    2   2   0        12
                80.08          9.76        1.1983    3   1   1        24
                84.44         13.45        1.1473    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.