Li.67Al.67Si1.33O4
      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=.33, Li.67Al.67Si1.33O4, beta quartz structure
      _database_code_amcsd 0002464

      CELL PARAMETERS:    5.2102   5.2102   5.4551   90.000   90.000  120.000
      SPACE GROUP: P6_222    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    128.245
      Density (g/cm3):      2.408
      MAX. ABS. INTENSITY / VOLUME**2:      34.19100547    
      RIR:      4.623
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.67         12.53        4.5122    1   0   0         6
                25.62        100.00        3.4769    1   0   1        12
                34.43          3.60        2.6051    1   1   0         6
                38.57          1.46        2.3342    1   0   2        12
                39.96          3.78        2.2561    2   0   0         6
                43.40          3.38        2.0848    2   0   1        12
                48.31         18.25        1.8839    1   1   2        12
                52.65          1.47        1.7384    2   0   2        12
                56.54          7.76        1.6277    2   1   1        12
                61.67          1.15        1.5041    3   0   0         6
                64.43          3.55        1.4460    2   1   2        12
                65.98          8.03        1.4158    2   0   3        12
                71.65          2.43        1.3171    3   0   2        12
                72.58          2.78        1.3025    2   2   0         6
                76.59          2.38        1.2439    2   1   3        12
                78.40          4.29        1.2198    3   1   1        12
                79.29          2.62        1.2082    1   1   4        12
                85.34          1.28        1.1374    3   1   2        12
                86.22          1.07        1.1280    4   0   0         6
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.