Ringwoodite
      Ye Y, Brown D A, Smyth J R, Panero W R, Jacobsen S D, Chang Y Y, Townsend J P,
      Thomas S M, Hauri E H, Dera P, Frost D J
      American Mineralogist 97 (2012) 573-582
      Compressibility and thermal expansion of hydrous ringwoodite with 2.5(3) wt% H2O
      Locality: synthetic
      Note: at room T after heating to T = 635 K, split Si model
      _database_code_amcsd 0018840

      CELL PARAMETERS:    8.0947   8.0947   8.0947   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    530.398
      Density (g/cm3):      3.429
      MAX. ABS. INTENSITY / VOLUME**2:      19.76173245    
      RIR:      1.876
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.25         31.39        2.8619    2   2   0        12
                36.83        100.00        2.4406    3   1   1        24
                38.53          3.43        2.3367    2   2   2         8
                44.79         48.68        2.0237    4   0   0         6
                49.06          2.34        1.8571    3   3   1        24
                55.62          9.72        1.6523    4   2   2        24
                59.32          9.95        1.5578    3   3   3         8
                59.32         14.35        1.5578    5   1   1        24
                65.20         64.03        1.4310    4   4   0        12
                74.07          3.65        1.2799    6   2   0        24
                77.29          8.54        1.2344    5   3   3        24
                82.57          5.21        1.1684    4   4   4         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.