Protopyroxene
      Yang H, Finger L W, Conrad P G, Prewitt C T, Hazen R M
      American Mineralogist 84 (1999) 245-256
      A new pyroxene structure at high pressure: Single-crystal X-ray and Raman study
      of the Pbcn - P2_1cn phase transition in protopyroxene
      Sample at P = 0.00 GPa, (Mg1.54Li.23Sc.23)Si2O6
      _database_code_amcsd 0002092

      CELL PARAMETERS:    9.2554   8.7650   5.3333   90.000   90.000   90.000
      SPACE GROUP: Pbcn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    432.656
      Density (g/cm3):      3.094
      MAX. ABS. INTENSITY / VOLUME**2:      12.33548759    
      RIR:      1.298
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.92          6.89        6.3641    1   1   0         4
                19.18          1.00        4.6277    2   0   0         2
                20.26         10.20        4.3825    0   2   0         2
                27.47         21.94        3.2467    2   1   1         8
                28.04         18.83        3.1820    2   2   0         4
                28.06        100.00        3.1799    1   2   1         8
                30.72         46.00        2.9101    3   1   0         4
                32.13          4.16        2.7861    1   3   0         4
                32.77         34.30        2.7326    2   2   1         8
                35.02         25.11        2.5624    1   0   2         4
                35.13          2.44        2.5546    3   1   1         8
                36.38          8.48        2.4695    1   3   1         8
                38.98         22.32        2.3105    2   0   2         4
                40.23          5.81        2.2417    2   3   1         8
                40.37          3.58        2.2342    2   1   2         8
                42.62          1.73        2.1214    3   3   0         4
                43.89          4.54        2.0630    4   1   1         8
                45.83         15.70        1.9799    1   4   1         8
                46.05         17.83        1.9712    3   3   1         8
                46.17          5.58        1.9661    3   1   2         8
                47.18          1.16        1.9265    1   3   2         8
                47.60          4.08        1.9104    4   2   1         8
                49.07          2.29        1.8566    2   4   1         8
                49.75          2.87        1.8326    3   2   2         8
                50.38          3.98        1.8111    5   1   0         4
                52.35          4.25        1.7477    4   0   2         4
                53.18          5.81        1.7224    1   5   0         4
                53.35          8.32        1.7173    4   3   1         8
                53.46          2.32        1.7139    4   1   2         8
                53.52          1.33        1.7122    1   1   3         8
                54.18          1.51        1.6930    0   4   2         4
                55.15          3.93        1.6654    1   4   2         8
                55.34          1.06        1.6601    3   3   2         8
                55.80         17.78        1.6474    0   2   3         4
                56.71          5.66        1.6233    4   2   2         8
                57.96          3.05        1.5910    4   4   0         4
                58.01          2.00        1.5899    2   4   2         8
                58.94          2.20        1.5670    2   5   1         8
                59.97          2.64        1.5426    6   0   0         2
                60.77          1.72        1.5241    3   5   0         4
                61.08          1.78        1.5171    3   1   3         8
                61.83         16.63        1.5005    5   3   1         8
                61.91          9.04        1.4987    1   3   3         8
                61.93          7.37        1.4982    5   1   2         8
                63.70          7.49        1.4608    0   6   0         2
                64.39          3.86        1.4468    1   5   2         8
                64.91          1.38        1.4366    5   2   2         8
                66.62          2.15        1.4038    6   2   1         8
                67.89          4.60        1.3806    0   4   3         4
                68.91          5.09        1.3626    3   3   3         8
                70.12          1.16        1.3420    4   2   3         8
                70.53          2.84        1.3353    6   0   2         4
                71.37         10.77        1.3216    6   3   1         8
                71.47          5.23        1.3200    6   1   2         8
                71.49          6.92        1.3197    1   0   4         4
                72.26          1.83        1.3074    7   1   0         4
                73.99          1.94        1.2812    2   0   4         4
                74.81          6.61        1.2691    1   6   2         8
                75.19          1.02        1.2637    1   2   4         8
                77.05          2.40        1.2377    4   5   2         8
                77.10          1.30        1.2370    1   5   3         8
                77.27          5.32        1.2347    2   6   2         8
                82.08          1.61        1.1741    5   3   3         8
                84.31          4.88        1.1487    5   5   2         8
                84.61          2.52        1.1453    4   1   4         8
                86.91          2.57        1.1208    4   6   2         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.