Tridymite
      Kihara K, Matsumoto T, Imamura M
      Zeitschrift fur Kristallographie 177 (1986) 27-38
      Structural change of orthorhombic-I tridymite with temperature:
      A study based on second-order thermal-vibrational parameters
      Note: Dollase's model, T = 573 K
      Locality: synthetic refractory silica brick
      _database_code_amcsd 0020933

      CELL PARAMETERS:    8.7640   5.0390   8.2350   90.000   90.000   90.000
      SPACE GROUP: C222_1    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    363.672
      Density (g/cm3):      2.194
      MAX. ABS. INTENSITY / VOLUME**2:      11.29051507    
      RIR:      1.675
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                20.27         61.76        4.3820    2   0   0         2
                20.33        100.00        4.3684    1   1   0         4
                21.58         86.13        4.1175    0   0   2         2
                22.99         29.38        3.8684    2   0   1         4
                23.05         63.43        3.8591    1   1   1         4
                29.77          9.08        3.0007    2   0   2         4
                29.82         22.94        2.9963    1   1   2         4
                35.52         23.65        2.5273    3   1   0         4
                35.63         10.62        2.5195    0   2   0         2
                37.32          1.36        2.4093    0   2   1         4
                38.71          6.37        2.3263    2   0   3         4
                38.74          9.93        2.3242    1   1   3         4
                41.94          2.38        2.1539    3   1   2         4
                42.70          3.67        2.1173    4   0   1         4
                42.83          6.20        2.1112    2   2   1         4
                43.98          3.18        2.0587    0   0   4         2
                47.10          1.76        1.9295    2   2   2         4
                48.91          2.91        1.8623    1   1   4         4
                53.51          2.27        1.7124    4   0   3         4
                53.62          3.64        1.7092    2   2   3         4
                55.51          2.57        1.6555    5   1   0         4
                55.59          1.68        1.6533    4   2   0         4
                55.72          1.27        1.6496    1   3   0         4
                56.72          1.93        1.6230    5   1   1         4
                56.80          2.29        1.6210    4   2   1         4
                56.93          2.81        1.6175    1   3   1         4
                60.01          2.80        1.5417    2   0   5         4
                60.03          4.89        1.5411    1   1   5         4
                60.33          1.24        1.5342    4   2   2         4
                60.46          1.16        1.5313    1   3   2         4
                63.71          1.26        1.4607    6   0   0         2
                63.93          1.95        1.4561    3   3   0         4
                65.05          1.02        1.4339    3   3   1         4
                65.89          2.07        1.4176    5   1   3         4
                65.96          1.67        1.4163    4   2   3         4
                66.08          1.67        1.4140    1   3   3         4
                71.69          1.33        1.3165    4   0   5         4
                71.78          2.13        1.3150    2   2   5         4
                75.19          1.77        1.2637    6   2   0         4
                76.50          1.03        1.2453    0   4   1         4
                79.46          1.38        1.2061    3   1   6         4
                82.64          1.20        1.1676    5   1   5         4
                82.71          1.09        1.1668    4   2   5         4
                82.82          1.02        1.1655    1   3   5         4
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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.