Tridymite
      Konnert J H, Appleman D E
      Acta Crystallographica B34 (1978) 391-403
      The crystal structure of low tridymite
      Locality: Plumas County, California, USA
      _database_code_amcsd 0009625

      CELL PARAMETERS:    9.9320  17.2160  81.8640   90.000   90.000   90.000
      SPACE GROUP: F1        
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:  13997.869
      Density (g/cm3):      2.281
      MAX. ABS. INTENSITY / VOLUME**2:      9.818392542    
      RIR:      1.402
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                20.64         55.23        4.3040    0   4   0         1
                20.65         50.10        4.3015    2   2   0         1
                20.65         49.90        4.3015   -2   2   0         1
                20.92          2.94        4.2459    2   0  10         1
                20.92          2.92        4.2459   -2   0  10         1
                21.71         98.08        4.0932    0   0  20         1
                23.35         15.91        3.8096    0  -4  10         1
                23.35         15.34        3.8096    0   4  10         1
                23.36         14.04        3.8078    2  -2  10         1
                23.36         13.96        3.8078   -2  -2  10         1
                23.36         15.14        3.8078    2   2  10         1
                23.36         15.05        3.8078   -2   2  10         1
                27.42         11.20        3.2524    2   4   0         1
                27.42         11.22        3.2524   -2   4   0         1
                28.14          2.72        3.1711    0  -2  24         1
                28.14          2.90        3.1711    0   2  24         1
                28.21          1.37        3.1638    2  -4   6         1
                28.21          1.38        3.1638   -2  -4   6         1
                30.13          4.90        2.9661    0  -4  20         1
                30.13          4.43        2.9661    0   4  20         1
                30.14          3.66        2.9652    2   2  20         1
                30.14          3.70        2.9652   -2   2  20         1
                30.14          3.92        2.9652    2  -2  20         1
                30.14          3.88        2.9652   -2  -2  20         1
                30.22          1.61        2.9570    0  -2  26         1
                30.22          1.27        2.9570    0   2  26         1
                31.48          1.61        2.8415    0  -6   4         1
                31.48          1.46        2.8415    0   6   4         1
                33.71          1.99        2.6592    2   0  26         1
                33.71          2.09        2.6592   -2   0  26         1
                36.15          6.64        2.4844    2   6   0         1
                36.15          6.65        2.4844   -2   6   0         1
                36.18          6.52        2.4830    4   0   0         1
                37.71          2.94        2.3857   -4   2   0         1
                37.71          2.95        2.3857    4   2   0         1
                39.09          2.27        2.3046    0  -4  30         1
                39.09          2.73        2.3046    0   4  30         1
                39.09          3.24        2.3042    2   2  30         1
                39.09          2.51        2.3042    2  -2  30         1
                39.09          2.39        2.3042   -2  -2  30         1
                39.09          3.12        2.3042   -2   2  30         1
                43.48          1.43        2.0813    0  -8  10         1
                43.48          1.16        2.0813    0   8  10         1
                43.51          1.06        2.0802   -4   4  10         1
                43.51          1.06        2.0802    4   4  10         1
                44.26          3.32        2.0466    0   0  40         1
                45.96          1.95        1.9746    2   8   0         1
                45.96          1.96        1.9746   -2   8   0         1
                54.29          1.44        1.6898    0  -8  30         1
                54.29          1.18        1.6898    0   8  30         1
                54.31          1.05        1.6892    4   4  30         1
                54.31          1.13        1.6892    4  -4  30         1
                54.31          1.10        1.6892   -4  -4  30         1
                54.80          1.02        1.6753    2   0  46         1
                54.80          1.12        1.6753   -2   0  46         1
                59.86          1.40        1.5450    6   4   0         1
                59.86          1.37        1.5450   -6   4   0         1
                60.50          1.18        1.5303    0  -4  50         1
                60.50          1.44        1.5303    0   4  50         1
                60.50          1.24        1.5302    2  -2  50         1
                60.50          1.19        1.5302   -2  -2  50         1
                60.50          1.45        1.5302    2   2  50         1
                60.50          1.39        1.5302   -2   2  50         1
                65.01          2.20        1.4347    0  12   0         1
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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.