Li.1Al.1Si1.9O4
      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=.9, Li.1Al.1Si1.9O4, alpha quartz structure
      _database_code_amcsd 0002467

      CELL PARAMETERS:    4.9567   4.9567   5.4164   90.000   90.000  120.000
      SPACE GROUP: P3_221    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    115.246
      Density (g/cm3):      2.609
      MAX. ABS. INTENSITY / VOLUME**2:      35.21200550    
      RIR:      4.394
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                20.69         17.87        4.2926    1   0   0         6
                26.49         33.89        3.3642    0   1   1         6
                26.49         66.11        3.3642    1   0   1         6
                36.25          6.25        2.4783    1   1   0         3
                39.34          4.92        2.2905    0   1   2         6
                40.01          2.17        2.2536    1   1   1         6
                42.10          4.55        2.1463    2   0   0         6
                45.46          2.07        1.9954    0   2   1         6
                49.88         13.64        1.8283    1   1   2         6
                54.56          2.57        1.6821    2   0   2         6
                55.19          1.20        1.6643    1   0   3         6
                59.47          3.62        1.5542    1   2   1         6
                59.47          4.62        1.5542    2   1   1         6
                63.78          1.25        1.4593    1   1   3         6
                67.27          1.39        1.3918    1   2   2         6
                67.27          3.21        1.3918    2   1   2         6
                67.73          2.89        1.3834    3   0   1         6
                67.83          4.94        1.3816    0   2   3         6
                67.83          1.56        1.3816    2   0   3         6
                73.31          1.16        1.2914    0   1   4         6
                75.09          1.47        1.2651    0   3   2         6
                79.41          1.68        1.2068    1   2   3         6
                80.90          2.26        1.1883    1   1   4         6
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.