Mg2SiO4
      Baur W H
      American Mineralogist 57 (1972) 709-731
      Computer-simulated crystal structures of observed and hypothetical Mg2SiO4
      polymorphs of low and high density
      K2MgF4 structure
      Locality: hypothetical
      _database_code_amcsd 0000284

      CELL PARAMETERS:    3.5100   3.5100  10.4500   90.000   90.000   90.000
      SPACE GROUP: I4/mmm    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    128.745
      Density (g/cm3):      3.629
      MAX. ABS. INTENSITY / VOLUME**2:      16.29851444    
      RIR:      1.462
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.97        100.00        5.2250    0   0   2         2
                26.79          6.55        3.3273    1   0   1         8
                36.19         73.86        2.4819    1   1   0         4
                36.34         24.90        2.4725    1   0   3         8
                40.23          5.87        2.2419    1   1   2         8
                50.74         35.78        1.7994    1   1   4         8
                50.85         46.98        1.7958    1   0   5         8
                52.11         68.81        1.7550    2   0   0         4
                52.54         13.60        1.7417    0   0   6         2
                55.21         11.06        1.6637    2   0   2         8
                65.19         11.36        1.4311    2   1   3        16
                65.47          3.33        1.4257    1   1   6         8
                72.34          5.29        1.3062    0   0   8         2
                75.79         22.84        1.2551    2   1   5        16
                76.81         15.65        1.2410    2   2   0         4
                77.16         11.91        1.2362    2   0   6         8
                79.36          3.09        1.2074    2   2   2         8
                83.66          3.47        1.1559    1   1   8         8
                87.98          8.27        1.1100    3   1   0         8
                88.07          2.53        1.1091    3   0   3         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.