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 = 300 K, P = 18.85 GPa
      Locality: synthetic
      _database_code_amcsd 0020784

      CELL PARAMETERS:    4.1101   4.1101   4.1101   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     69.432
      Density (g/cm3):      4.368
      MAX. ABS. INTENSITY / VOLUME**2:      46.20589901    
      RIR:      3.444
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                37.92         22.56        2.3730    1   1   1         8
                44.07        100.00        2.0550    2   0   0         6
                64.08         49.94        1.4531    2   2   0        12
                76.94          9.74        1.2392    3   1   1        24
                81.05         13.68        1.1865    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.