Li.31Al.31Si1.69O4
      Xu H, Heaney P J, Beall G H
      American Mineralogist 85 (2000) 971-979
      Phase transitions induced by solid solution in stuffed derivatives of quartz:
      A powder synchrotron XRD study of the LiAlSiO4-SiO2 join
      Sample: x=.69, Li.31Al.31Si1.69O4, alpha quartz structure
      _database_code_amcsd 0002466

      CELL PARAMETERS:    5.0865   5.0865   5.4451   90.000   90.000  120.000
      SPACE GROUP: P3_221    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    122.004
      Density (g/cm3):      2.490
      MAX. ABS. INTENSITY / VOLUME**2:      35.19357258    
      RIR:      4.602
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                20.16         15.65        4.4050    1   0   0         6
                26.02         42.48        3.4247    0   1   1         6
                26.02         57.52        3.4247    1   0   1         6
                35.29          4.85        2.5433    1   1   0         3
                38.89          2.56        2.3159    0   1   2         6
                40.98          3.87        2.2025    2   0   0         6
                44.37          2.42        2.0418    0   2   1         6
                49.01         16.43        1.8585    1   1   2         6
                53.51          1.72        1.7123    2   0   2         6
                57.92          3.21        1.5922    1   2   1         6
                57.92          4.63        1.5922    2   1   1         6
                65.74          1.78        1.4204    1   2   2         6
                65.74          2.19        1.4204    2   1   2         6
                65.88          1.38        1.4177    3   0   1         6
                66.79          2.44        1.4007    2   0   3         6
                66.79          4.71        1.4007    0   2   3         6
                73.24          1.09        1.2924    0   3   2         6
                73.24          1.27        1.2924    3   0   2         6
                74.64          2.18        1.2716    2   2   0         3
                77.85          1.33        1.2269    1   2   3         6
                77.85          1.08        1.2269    2   1   3         6
                79.93          2.50        1.2002    1   1   4         6
                80.59          1.26        1.1921    1   3   1         6
                80.59          2.15        1.1921    3   1   1         6
                87.52          1.06        1.1147    3   1   2         6
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.