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: JKW56
      _database_code_amcsd 0002745

      CELL PARAMETERS:    5.0812   5.0812  13.2112   90.000   90.000  120.000
      SPACE GROUP: P6_3cm    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    295.397
      Density (g/cm3):      3.092
      MAX. ABS. INTENSITY / VOLUME**2:      13.55529963    
      RIR:      1.428
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.40          4.06        6.6056    0   0   2         1
                20.18         18.56        4.4004    1   0   0         6
                33.94        100.00        2.6415    1   0   4         6
                35.33         78.35        2.5406    1   1   0         6
                36.00         16.87        2.4949    1   1   1         6
                37.94         13.68        2.3713    1   1   2         6
                40.99         13.77        2.2019    0   0   6         1
                41.01         35.17        2.2006    1   1   3         6
                43.35          1.10        2.0875    2   0   2         6
                45.02         37.09        2.0137    1   1   4         6
                46.10          2.41        1.9691    1   0   6         6
                49.79          1.25        1.8314    1   1   5         6
                49.80         22.24        1.8311    2   0   4         6
                55.66          9.25        1.6514    0   0   8         1
                59.40          1.17        1.5559    2   1   3        12
                61.17          4.10        1.5150    1   1   7         6
                62.53         23.97        1.4855    2   1   4        12
                63.41         40.56        1.4668    3   0   0         6
                67.67         32.93        1.3846    1   1   8         6
                74.68          2.44        1.2710    1   1   9         6
                74.73          7.12        1.2703    2   2   0         6
                78.32          4.72        1.2207    3   0   6         6
                78.34          2.07        1.2205    2   2   3         6
                81.12          2.87        1.1856    2   2   4         6
                84.66         12.16        1.1448    3   1   4        12
                89.33         11.60        1.0967    3   0   8         6
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.