Phase-A
      Kagi H, Parise J B, Cho H, Rossman G R, Loveday J S
      Physics and Chemistry of Minerals 27 (2000) 225-233
      Hydrogen bonding interactions in phase A [Mg7Si2O8(OH)6]
      at ambient and high pressure
      Sample: P = 3.2 GPa
      _database_code_amcsd 0008405

      CELL PARAMETERS:    7.7972   7.7972   9.5071   90.000   90.000  120.000
      SPACE GROUP: P6_3      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    500.560
      Density (g/cm3):      3.027
      MAX. ABS. INTENSITY / VOLUME**2:      10.87447615    
      RIR:      1.170
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.11          4.07        6.7526    1   0   0         6
                16.10          1.80        5.5052    1   0   1         6
                18.67          1.55        4.7536    0   0   2         1
                22.81         25.71        3.8986    1   1   0         6
                22.88          9.21        3.8870    1   0   2         6
                24.68         32.26        3.6071    1   1   1         6
                28.05          7.60        3.1816    2   0   1         6
                29.64          3.65        3.0144    1   1   2         6
                31.18         14.12        2.8688    1   0   3         6
                32.53         61.81        2.7526    2   0   2         6
                35.16          1.69        2.5522    2   1   0         6
                36.45          5.93        2.4650    2   1   1         6
                36.54         19.04        2.4591    1   1   3         6
                37.85          7.46        2.3768    0   0   4         1
                40.06          7.33        2.2509    3   0   0         6
                40.10         64.28        2.2486    1   2   2         6
                40.10         35.72        2.2486    2   1   2         6
                44.54          2.28        2.0343    3   0   2         6
                44.65          2.22        2.0294    1   1   4         6
                45.64         37.09        1.9877    1   2   3         6
                45.64          4.37        1.9877    2   1   3         6
                46.74          2.00        1.9435    2   0   4         6
                47.62          2.52        1.9096    2   2   1         6
                49.61          1.28        1.8375    1   3   1         6
                49.61          1.86        1.8375    3   1   1         6
                49.68          2.60        1.8351    3   0   3         6
                52.52          5.89        1.7425    1   3   2         6
                52.62         14.62        1.7394    1   2   4         6
                52.62          1.58        1.7394    2   1   4         6
                53.63          1.33        1.7090    1   1   5         6
                54.34          1.63        1.6881    4   0   0         6
                55.27          1.48        1.6621    4   0   1         6
                55.33          1.14        1.6603    2   2   3         6
                55.46          2.16        1.6568    2   0   5         6
                56.29          6.05        1.6343    3   0   4         6
                57.13          4.26        1.6123    3   1   3         6
                57.97          2.00        1.5908    4   0   2         6
                58.23          1.15        1.5845    0   0   6         1
                59.69          1.07        1.5491    3   2   0         6
                59.97          1.90        1.5426    1   0   6         6
                60.56          2.98        1.5290    2   3   1         6
                60.56          1.55        1.5290    3   2   1         6
                60.74         36.58        1.5248    1   2   5         6
                62.32          4.25        1.4899    4   0   3         6
                63.09          3.21        1.4735    1   4   0         6
                63.09         43.65        1.4735    4   1   0         6
                63.12         11.31        1.4729    2   3   2         6
                65.02          2.99        1.4344    2   0   6         6
                66.42          1.09        1.4075    1   4   2         6
                69.87          8.23        1.3462    1   2   6         6
                69.87          4.07        1.3462    2   1   6         6
                70.48          1.29        1.3362    1   4   3         6
                70.76          3.00        1.3315    1   0   7         6
                73.56          2.03        1.2876    3   3   1         6
                73.89          2.38        1.2826    1   1   7         6
                75.99          1.46        1.2524    1   4   4         6
                75.99          3.29        1.2524    4   1   4         6
                76.71          1.60        1.2424    5   0   3         6
                77.44          1.28        1.2325    4   2   2         6
                77.44          3.52        1.2325    2   4   2         6
                79.18          1.06        1.2097    3   1   6         6
                79.76          1.54        1.2024    3   3   3         6
                80.89          3.02        1.1884    0   0   8         1
                81.27          2.60        1.1837    2   4   3         6
                81.99          2.36        1.1752    1   5   2         6
                81.99          1.50        1.1752    5   1   2         6
                83.71          2.30        1.1553    4   0   6         6
                86.58          1.74        1.1243    2   4   4         6
                88.21          3.48        1.1077    2   3   6         6
                89.04          1.97        1.0995    3   1   7         6
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.