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 = 736 K, split Si model
      _database_code_amcsd 0018842

      CELL PARAMETERS:    8.1115   8.1115   8.1115   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    533.708
      Density (g/cm3):      3.359
      MAX. ABS. INTENSITY / VOLUME**2:      15.79268831    
      RIR:      1.531
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.19         31.99        2.8678    2   2   0        12
                36.75        100.00        2.4457    3   1   1        24
                38.44          3.73        2.3416    2   2   2         8
                44.69         60.10        2.0279    4   0   0         6
                48.95          2.21        1.8609    3   3   1        24
                55.50          9.49        1.6558    4   2   2        24
                59.19          9.51        1.5611    3   3   3         8
                59.19         13.48        1.5611    5   1   1        24
                65.04         68.86        1.4339    4   4   0        12
                73.90          3.41        1.2825    6   2   0        24
                77.10          7.67        1.2370    5   3   3        24
                82.36          5.77        1.1708    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.