Cummingtonite
      Yang H, Hazen R M, Prewitt C T, Finger L W, Lu R, Hemley R J
      American Mineralogist 83 (1998) 288-299
      High-pressure single-crystal X-ray diffraction and infrared spectroscopic
      studies of the C2/m-P2_1/m phase transition in cummingtonite
      Sample: P = 0.60 GPa
      _database_code_amcsd 0001971

      CELL PARAMETERS:    9.4890  18.1508   5.3102   90.000  102.210   90.000
      SPACE GROUP: C2/m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    893.902
      Density (g/cm3):      3.304
      MAX. ABS. INTENSITY / VOLUME**2:      8.150266049    
      RIR:      0.803
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 9.75         48.49        9.0754    0   2   0         2
                10.71        100.00        8.2587    1   1   0         4
                17.08         12.49        5.1901    0   0   1         2
                17.50          5.91        5.0673    1   3   0         4
                18.40         17.47        4.8226   -1   1   1         4
                19.14          3.77        4.6372    2   0   0         2
                19.56         11.33        4.5377    0   4   0         2
                19.70          3.59        4.5054    0   2   1         4
                21.52         16.11        4.1294    2   2   0         4
                21.87          5.13        4.0631    1   1   1         4
                22.86          4.77        3.8909   -2   0   1         2
                23.07         32.93        3.8553   -1   3   1         4
                25.96         39.83        3.4329    1   3   1         4
                26.08          3.61        3.4161    0   4   1         4
                26.37          1.15        3.3804    1   5   0         4
                27.50         47.93        3.2432    2   4   0         4
                28.39          4.64        3.1434    2   0   1         2
                29.31         71.82        3.0476    3   1   0         4
                29.53          3.30        3.0251    0   6   0         2
                30.09         38.15        2.9703    2   2   1         4
                30.26          2.30        2.9537   -2   4   1         4
                30.42          4.20        2.9381   -1   5   1         4
                30.77          1.12        2.9058   -3   1   1         4
                32.53         10.83        2.7529    3   3   0         4
                32.71         90.71        2.7377    1   5   1         4
                33.86          8.19        2.6471   -3   3   1         4
                34.21          5.40        2.6209   -1   1   2         4
                34.31         51.99        2.6136    0   6   1         4
                34.56          1.37        2.5950    0   0   2         2
                35.43          5.20        2.5337    2   6   0         4
                35.90         61.29        2.5012   -2   0   2         2
                36.00          2.05        2.4950    0   2   2         4
                37.29          1.62        2.4113   -2   2   2         4
                37.66          3.84        2.3882   -2   6   1         4
                38.24          3.56        2.3536    3   5   0         4
                39.13          7.01        2.3021   -1   7   1         4
                39.41         24.28        2.2865   -3   5   1         4
                39.73          2.40        2.2689    0   8   0         2
                40.35         12.03        2.2353   -4   2   1         4
                40.70         15.84        2.2171   -3   1   2         4
                40.99         11.03        2.2018    1   7   1         4
                41.21          3.48        2.1905   -2   4   2         4
                41.43         44.94        2.1797    2   6   1         4
                43.17          2.50        2.0955   -3   3   2         4
                43.41         22.68        2.0845    2   0   2         2
                43.53          2.67        2.0789    0   8   1         4
                43.85          1.84        2.0647    4   4   0         4
                44.45          3.75        2.0380    2   8   0         4
                44.60          1.24        2.0316    2   2   2         4
                44.77         12.61        2.0244    3   5   1         4
                45.67          2.00        1.9867    3   7   0         4
                45.69          1.28        1.9858    1   5   2         4
                46.06          2.53        1.9707    1   9   0         4
                46.08          1.60        1.9696    0   6   2         4
                46.13          1.58        1.9676    4   0   1         2
                46.32          1.41        1.9600   -2   8   1         4
                46.68          5.25        1.9458   -3   7   1         4
                46.69         10.77        1.9455   -4   0   2         2
                47.81          2.18        1.9025   -3   5   2         4
                47.82          2.03        1.9023   -4   2   2         4
                48.68          7.24        1.8705   -1   9   1         4
                49.39          2.07        1.8453    5   1   0         4
                49.53          1.85        1.8402    4   6   0         4
                49.55          1.81        1.8397    2   8   1         4
                49.71          2.76        1.8341   -4   6   1         4
                50.26          1.54        1.8155    1   9   1         4
                51.08          9.41        1.7881   -4   4   2         4
                51.53          1.71        1.7734    5   3   0         4
                53.43          2.37        1.7149   -2   2   3         4
                53.66          5.18        1.7081    0   8   2         4
                53.95          2.73        1.6994    0   2   3         4
                53.99          5.89        1.6983   -1   3   3         4
                54.20          1.04        1.6924   -3   7   2         4
                54.61          2.66        1.6805   -2   8   2         4
                54.63          9.06        1.6800   -5   1   2         4
                55.08          4.32        1.6673   -5   5   1         4
                55.73         31.97        1.6494    4   6   1         4
                56.66         12.16        1.6246    1  11   0         4
                56.77          1.84        1.6216    4   8   0         4
                57.98         21.21        1.5906   -1   5   3         4
                58.74          4.47        1.5719    2  10   1         4
                58.75          5.95        1.5717    4   0   2         2
                59.71          1.15        1.5487    4   2   2         4
                59.83          6.54        1.5457    6   0   0         2
                60.23          2.12        1.5365    1   9   2         4
                61.28         14.77        1.5126    0  12   0         2
                61.29         16.06        1.5124   -2   6   3         4
                61.77          6.44        1.5018    0   6   3         4
                62.10          2.96        1.4947    5   5   1         4
                62.48          1.29        1.4865    4   8   1         4
                62.54          4.93        1.4851    4   4   2         4
                62.93          2.01        1.4769   -4   8   2         4
                63.17          6.26        1.4719   -6   0   2         2
                63.67          5.22        1.4616   -1   7   3         4
                63.96          4.37        1.4557    3  11   0         4
                65.43          3.05        1.4264   -4  10   1         4
                66.80          1.87        1.4005   -1  11   2         4
                66.97         32.00        1.3973   -6   6   1         4
                67.59          1.38        1.3860    6   2   1         4
                67.84          5.49        1.3815   -4   6   3         4
                68.29         10.74        1.3735    5   1   2         4
                69.20          6.55        1.3575    2   6   3         4
                69.38          4.92        1.3546    1  11   2         4
                70.06          2.14        1.3431    5   3   2         4
                70.84          1.17        1.3301   -1   9   3         4
                71.02          2.01        1.3272   -3  11   2         4
                71.10          2.31        1.3259   -5   5   3         4
                71.25          1.22        1.3235   -6   6   2         4
                71.38          2.82        1.3214    7   1   0         4
                71.44          2.79        1.3205   -1   1   4         4
                72.30          2.29        1.3068    0  12   2         4
                72.90          8.68        1.2975    0   0   4         2
                73.11         17.66        1.2943   -2  12   2         4
                73.13          1.70        1.2941   -5   9   2         4
                74.66          3.11        1.2713   -2   4   4         4
                74.83          2.81        1.2688   -7   5   1         4
                74.92          1.51        1.2675   -7   3   2         4
                74.97          2.60        1.2668    4  12   0         4
                75.55          1.17        1.2585   -2  10   3         4
                76.00          1.59        1.2522    4   2   3         4
                76.11          3.66        1.2506   -4   0   4         2
                78.06          2.97        1.2242    2  12   2         4
                78.42          1.30        1.2194    6   0   2         2
                80.42          1.90        1.1941   -4  12   2         4
                81.08          2.94        1.1861    2   0   4         2
                81.61          7.92        1.1797   -5  11   2         4
                83.12          1.41        1.1621    1  15   1         4
                83.36          1.81        1.1593    8   0   0         2
                87.30          1.20        1.1169   -6   0   4         2
                87.67          2.50        1.1131    3   1   4         4
                88.25          1.66        1.1073    7   9   0         4
                89.40          1.13        1.0960    5   5   3         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.