Pyroxene-ideal
      Thompson R M, Downs R T
      American Mineralogist 89 (2004) 614-628
      Model pyroxenes II: Structural variation as a function of tetrahedral rotation
      model diopside after Levien and Prewitt (1981)
      with O3-O3-O3 angle = 166.4 and model oxygen radius = 1.319
      _database_code_amcsd 0003480

      CELL PARAMETERS:    9.7600   9.0710   5.2370   90.000  108.700   90.000
      SPACE GROUP: C2/c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    439.171
      Density (g/cm3):      3.275
      MAX. ABS. INTENSITY / VOLUME**2:      6.469765558    
      RIR:      0.643
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.20          4.16        4.6224    2   0   0         2
                19.57          7.92        4.5355    0   2   0         2
                19.95         11.87        4.4495   -1   1   1         4
                26.63         73.32        3.3473    0   2   1         4
                27.55         59.86        3.2374    2   2   0         4
                29.36        100.00        3.0417   -2   2   1         4
                30.46         77.19        2.9342   -3   1   1         4
                30.64         79.99        2.9178    3   1   0         4
                31.12          7.12        2.8739    1   3   0         4
                34.47         70.91        2.6017   -1   3   1         4
                35.15          4.13        2.5530   -2   0   2         2
                35.74          2.13        2.5122   -1   1   2         4
                36.22         75.93        2.4803    0   0   2         2
                36.39         24.87        2.4692    2   2   1         4
                37.71          5.59        2.3857    1   3   1         4
                38.97          1.76        2.3112    4   0   0         2
                39.75          7.26        2.2678    0   4   0         2
                40.34         28.93        2.2358    3   1   1         4
                40.55          3.44        2.2247   -2   2   2         4
                41.50          7.86        2.1761    0   2   2         4
                41.72         46.31        2.1649   -3   3   1         4
                41.82         15.77        2.1598    1   1   2         4
                41.86          3.70        2.1582    3   3   0         4
                42.45          7.02        2.1294   -4   2   1         4
                43.90         15.32        2.0624    0   4   1         4
                43.97          8.15        2.0592    4   2   0         4
                44.17         23.31        2.0502   -4   0   2         2
                44.50         10.25        2.0359    2   4   0         4
                45.72         21.62        1.9845   -2   4   1         4
                46.79         11.74        1.9415    2   0   2         2
                49.36          2.80        1.8463   -3   3   2         4
                49.71          2.67        1.8341    3   3   1         4
                50.37          2.10        1.8117    5   1   0         4
                50.82         11.18        1.7965    2   4   1         4
                50.98          2.14        1.7914    1   3   2         4
                51.18         13.82        1.7849    2   2   2         4
                51.32          4.64        1.7802    1   5   0         4
                52.78          6.29        1.7345    4   2   1         4
                54.07          4.22        1.6960   -1   1   3         4
                54.09          7.38        1.6955   -2   4   2         4
                54.88          7.48        1.6728   -3   1   3         4
                55.43          9.64        1.6577    3   1   2         4
                55.63          2.84        1.6521   -4   4   1         4
                56.15         30.73        1.6382   -5   3   1         4
                56.53         22.27        1.6281   -2   2   3         4
                58.99          6.88        1.5659   -3   5   1         4
                59.09          1.86        1.5634    3   5   0         4
                59.63         14.51        1.5505   -6   0   2         2
                60.04         14.74        1.5408    6   0   0         2
                60.92          1.77        1.5208   -4   4   2         4
                61.32         21.41        1.5118    0   6   0         2
                61.89         16.82        1.4993   -1   3   3         4
                62.63          4.16        1.4832   -3   3   3         4
                63.03          3.32        1.4748    2   4   2         4
                63.17          1.91        1.4718    4   0   2         2
                63.40          3.01        1.4671   -6   2   2         4
                64.43          2.84        1.4460    4   4   1         4
                65.15          5.89        1.4318   -3   5   2         4
                65.45          6.47        1.4261    3   5   1         4
                66.99         37.44        1.3969    5   3   1         4
                67.78         12.38        1.3826   -2   4   3         4
                68.15          1.24        1.3759   -7   1   1         4
                68.19          5.67        1.3752    1   3   3         4
                69.91         11.53        1.3456   -7   1   2         4
                70.31          8.22        1.3388   -5   3   3         4
                72.27          1.43        1.3073   -2   0   4         2
                72.30          2.33        1.3069    7   1   0         4
                72.69          2.15        1.3009   -2   6   2         4
                73.07          2.41        1.2949    5   5   0         4
                73.32          5.71        1.2911   -3   1   4         4
                73.34         24.90        1.2909    0   6   2         4
                73.83          4.02        1.2835    5   1   2         4
                73.97          1.80        1.2814    3   1   3         4
                74.30          6.41        1.2765   -4   0   4         2
                75.08          1.43        1.2652    4   6   0         4
                75.72          3.49        1.2561   -2   2   4         4
                76.11          1.65        1.2507   -1   5   3         4
                76.79          2.12        1.2413   -3   5   3         4
                76.87          4.51        1.2401    0   0   4         2
                77.25          6.01        1.2351    3   5   2         4
                77.28          1.31        1.2346    4   4   2         4
                77.39          1.61        1.2332   -7   1   3         4
                78.63          2.24        1.2168   -4   6   2         4
                80.30          3.21        1.1957   -3   7   1         4
                80.39          1.12        1.1945    3   7   0         4
                80.52          3.41        1.1928    2   6   2         4
                82.14          2.28        1.1734   -8   2   1         4
                82.80          4.70        1.1657   -6   0   4         2
                82.83          2.86        1.1654   -8   2   2         4
                83.69          1.19        1.1556    8   0   0         2
                83.88          1.92        1.1535    6   0   2         2
                85.79          2.25        1.1327   -3   7   2         4
                86.05          1.20        1.1298    3   7   1         4
                87.01          1.10        1.1198    8   2   0         4
                87.79          2.25        1.1119    2   0   4         2
                88.44          1.13        1.1054    0   8   1         4
                88.86          1.02        1.1012    2   8   0         4
                89.07          3.51        1.0992   -8   2   3         4
                89.73          4.54        1.0929   -2   8   1         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.