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 = 0 GPa
      _database_code_amcsd 0008404

      CELL PARAMETERS:    7.8563   7.8563   9.5642   90.000   90.000  120.000
      SPACE GROUP: P6_3      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    511.229
      Density (g/cm3):      2.964
      MAX. ABS. INTENSITY / VOLUME**2:      10.19733784    
      RIR:      1.120
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.01          4.26        6.8038    1   0   0         6
                15.99          1.91        5.5441    1   0   1         6
                18.55          1.59        4.7821    0   0   2         1
                22.64         26.42        3.9281    1   1   0         6
                22.73          9.33        3.9124    1   0   2         6
                24.50         33.14        3.6336    1   1   1         6
                27.83          7.88        3.2052    2   0   1         6
                29.43          3.77        3.0354    1   1   2         6
                30.98         14.33        2.8869    1   0   3         6
                32.29         62.70        2.7720    2   0   2         6
                34.89          1.68        2.5716    2   1   0         6
                36.17          5.90        2.4834    2   1   1         6
                36.29         19.02        2.4754    1   1   3         6
                37.62          7.43        2.3911    0   0   4         1
                39.74          7.28        2.2679    3   0   0         6
                39.80         64.55        2.2649    1   2   2         6
                39.80         35.45        2.2649    2   1   2         6
                44.20          2.21        2.0492    3   0   2         6
                44.35          2.21        2.0424    1   1   4         6
                45.31         36.66        2.0016    1   2   3         6
                45.31          4.30        2.0016    2   1   3         6
                46.42          1.96        1.9562    2   0   4         6
                47.24          2.46        1.9239    2   2   1         6
                49.22          1.26        1.8513    1   3   1         6
                49.22          1.82        1.8513    3   1   1         6
                49.31          2.51        1.8480    3   0   3         6
                52.10          5.70        1.7553    1   3   2         6
                52.24         14.18        1.7511    1   2   4         6
                52.24          1.54        1.7511    2   1   4         6
                53.27          1.30        1.7198    1   1   5         6
                53.90          1.57        1.7009    4   0   0         6
                54.82          1.42        1.6747    4   0   1         6
                54.91          1.09        1.6722    2   2   3         6
                55.08          2.07        1.6673    2   0   5         6
                55.88          5.79        1.6455    3   0   4         6
                56.68          4.02        1.6239    3   1   3         6
                57.51          1.93        1.6026    4   0   2         6
                57.85          1.10        1.5940    0   0   6         1
                59.19          1.03        1.5609    3   2   0         6
                59.57          1.79        1.5520    1   0   6         6
                60.06          2.83        1.5405    2   3   1         6
                60.06          1.47        1.5405    3   2   1         6
                60.30         34.57        1.5348    1   2   5         6
                61.82          3.99        1.5007    4   0   3         6
                62.56          3.01        1.4847    1   4   0         6
                62.56         41.20        1.4847    4   1   0         6
                62.60         10.61        1.4838    2   3   2         6
                64.56          2.77        1.4434    2   0   6         6
                65.87          1.02        1.4179    1   4   2         6
                69.36          7.57        1.3549    1   2   6         6
                69.36          3.71        1.3549    2   1   6         6
                69.89          1.19        1.3459    1   4   3         6
                70.27          2.75        1.3396    1   0   7         6
                72.92          1.85        1.2973    3   3   1         6
                73.37          2.14        1.2905    1   1   7         6
                75.35          1.31        1.2613    1   4   4         6
                75.35          2.95        1.2613    4   1   4         6
                76.05          1.44        1.2515    5   0   3         6
                76.76          3.17        1.2417    2   4   2         6
                76.76          1.14        1.2417    4   2   2         6
                79.06          1.36        1.2112    3   3   3         6
                80.31          2.65        1.1955    0   0   8         1
                80.56          2.30        1.1925    2   4   3         6
                81.26          2.07        1.1839    1   5   2         6
                81.26          1.32        1.1839    5   1   2         6
                83.03          2.00        1.1631    4   0   6         6
                85.81          1.50        1.1324    2   4   4         6
                87.46          2.98        1.1152    2   3   6         6
                88.31          1.68        1.1067    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.