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: (Mg0.83,Fe0.17)O, T = 1100 K, P = 49.32 GPa
      Locality: synthetic
      _database_code_amcsd 0020777

      CELL PARAMETERS:    3.9775   3.9775   3.9775   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     62.926
      Density (g/cm3):      4.820
      MAX. ABS. INTENSITY / VOLUME**2:      49.91603369    
      RIR:      3.372
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                39.23         23.50        2.2964    1   1   1         8
                45.62        100.00        1.9887    2   0   0         6
                66.49         48.73        1.4063    2   2   0        12
                80.01          9.76        1.1993    3   1   1        24
                84.35         13.46        1.1482    2   2   2         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.