Phase-X
      Welch M D, Konzett J, Bindi L, Kohn S C, Frost D J
      American Mineralogist 97 (2012) 1849-1857
      New structural features of the high-pressure synthetic
      sheet-disilicate Phase-X, K(2-x)Mg2Si2O7Hx
      Locality: synthetic
      _database_code_amcsd 0019573

      CELL PARAMETERS:    5.0646   5.0646  13.2379   90.000   90.000  120.000
      SPACE GROUP: P6_3/mcm  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    294.063
      Density (g/cm3):      3.116
      MAX. ABS. INTENSITY / VOLUME**2:      13.14171115    
      RIR:      1.373
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.38          6.86        6.6189    0   0   2         2
                20.25         18.87        4.3861    1   0   0         6
                24.34          1.58        3.6562    1   0   2        12
                33.93        100.00        2.6418    1   0   4        12
                35.45         74.63        2.5323    1   1   0         6
                36.11         16.92        2.4872    1   1   1        12
                38.05         10.31        2.3651    1   1   2        12
                40.90         13.01        2.2063    0   0   6         2
                41.10         36.19        2.1963    1   1   3        12
                43.47          1.97        2.0817    2   0   2        12
                45.08         33.92        2.0111    1   1   4        12
                46.05          2.59        1.9710    1   0   6        12
                49.83          1.61        1.8300    1   1   5        12
                49.88         21.34        1.8281    2   0   4        12
                55.22          1.26        1.6635    1   1   6        12
                55.54          8.70        1.6547    0   0   8         2
                57.29          1.13        1.6081    2   1   2        24
                59.57          1.09        1.5519    2   1   3        24
                61.17          3.77        1.5152    1   1   7        12
                62.68         21.79        1.4822    2   1   4        24
                63.65         36.79        1.4620    3   0   0         6
                65.37          1.02        1.4276    3   0   2        12
                67.63         31.80        1.3852    1   1   8        12
                74.62          2.58        1.2719    1   1   9        12
                75.02          5.63        1.2661    2   2   0         6
                78.48          3.28        1.2187    3   0   6        12
                78.61          2.05        1.2170    2   2   3        12
                78.65          1.32        1.2165    3   1   0        12
                81.37          1.82        1.1826    2   2   4        12
                84.94          9.78        1.1418    3   1   4        24
                89.44          9.13        1.0956    3   0   8        12
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.