Phase-X
      Yang H, Konzett J, Prewitt C T
      American Mineralogist 86 (2001) 1483-1488
      Crystal structure of phase X, a high pressure alkali-rich hydrous silicate
      and its anhydrous equivalent
      Sample: JKW42
      _database_code_amcsd 0002744

      CELL PARAMETERS:    4.9827   4.9827   6.4354   90.000   90.000  120.000
      SPACE GROUP: P-31m     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    138.368
      Density (g/cm3):      3.096
      MAX. ABS. INTENSITY / VOLUME**2:      11.51025102    
      RIR:      1.211
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.76         28.59        6.4354    0   0   1         2
                20.58         31.26        4.3151    1   0   0         6
                24.84         10.45        3.5840    1   0   1        12
                27.72          1.52        3.2177    0   0   2         2
                34.78        100.00        2.5795    1   0   2        12
                36.05         69.39        2.4913    1   1   0         6
                38.76         38.43        2.3233    2  -1   1         6
                38.76         13.34        2.3233    1   1   1         6
                42.12          8.81        2.1451    0   0   3         2
                44.28          2.91        2.0457    2   0   1        12
                46.08         42.28        1.9699    1   1   2         6
                47.32          3.15        1.9209    1   0   3        12
                50.96         25.05        1.7920    2   0   2        12
                56.42          1.27        1.6310    2   1   0        12
                56.62          5.55        1.6256    2  -1   3         6
                57.26          8.53        1.6089    0   0   4         2
                58.37          1.99        1.5810    3  -1   1        12
                61.51          1.22        1.5075    1   0   4        12
                64.00         15.17        1.4548    3  -1   2        12
                64.00         10.65        1.4548    2   1   2        12
                64.82         38.45        1.4384    3   0   0         6
                66.62          2.56        1.4037    3   0   1        12
                69.56         27.18        1.3515    2  -1   4         6
                69.56          4.61        1.3515    1   1   4         6
                73.59          1.11        1.2871    0   0   5         2
                76.47          1.77        1.2457    2   2   0         6
                80.38          1.60        1.1947    3   0   3        12
                86.83          2.08        1.1217    3   1   2        12
                86.83          1.65        1.1217   -1  -3   2        12
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.