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 = 2.03 GPa, (Mg1.54Li.23Sc.23)Si2O6
      _database_code_amcsd 0002094

      CELL PARAMETERS:    9.2178   8.7039   5.3119   90.000   90.000   90.000
      SPACE GROUP: Pbcn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    426.178
      Density (g/cm3):      3.141
      MAX. ABS. INTENSITY / VOLUME**2:      12.34538668    
      RIR:      1.280
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.99          7.07        6.3285    1   1   0         4
                19.26          1.01        4.6089    2   0   0         2
                20.41         10.23        4.3520    0   2   0         2
                27.60         22.10        3.2323    2   1   1         8
                28.20         17.82        3.1642    2   2   0         4
                28.22        100.00        3.1621    1   2   1         8
                30.86         45.99        2.8974    3   1   0         4
                32.35          4.15        2.7675    1   3   0         4
                32.95         35.55        2.7185    2   2   1         8
                35.16         25.82        2.5521    1   0   2         4
                35.29          2.77        2.5436    3   1   1         8
                36.61          8.33        2.4543    1   3   1         8
                39.15         22.74        2.3012    2   0   2         4
                39.72          1.03        2.2694    3   2   1         8
                40.47          5.62        2.2287    2   3   1         8
                40.55          3.91        2.2248    2   1   2         8
                42.87          1.88        2.1095    3   3   0         4
                44.08          4.84        2.0543    4   1   1         8
                46.14         16.04        1.9672    1   4   1         8
                46.31         18.06        1.9605    3   3   1         8
                46.38          5.47        1.9578    3   1   2         8
                47.83          3.94        1.9016    4   2   1         8
                49.39          2.30        1.8452    2   4   1         8
                50.00          3.08        1.8243    3   2   2         8
                50.61          3.90        1.8035    5   1   0         4
                52.58          4.21        1.7406    4   0   2         4
                53.58          5.66        1.7105    1   5   0         4
                53.64          8.18        1.7086    4   3   1         8
                53.70          2.41        1.7068    4   1   2         8
                53.76          1.39        1.7051    1   1   3         8
                54.52          1.51        1.6832    0   4   2         4
                55.50          4.06        1.6558    1   4   2         8
                55.64          1.05        1.6519    3   3   2         8
                56.07         17.81        1.6401    0   2   3         4
                56.98          5.40        1.6161    4   2   2         8
                58.32          3.12        1.5821    4   4   0         4
                58.37          1.88        1.5811    2   4   2         8
                59.36          2.20        1.5570    2   5   1         8
                60.24          2.65        1.5363    6   0   0         2
                61.19          1.93        1.5146    3   5   0         4
                61.36          1.86        1.5108    3   1   3         8
                62.16         16.92        1.4933    5   3   1         8
                62.22          7.42        1.4921    5   1   2         8
                62.25          9.06        1.4915    1   3   3         8
                64.20          7.45        1.4507    0   6   0         2
                64.83          3.98        1.4381    1   5   2         8
                65.23          1.55        1.4303    5   2   2         8
                66.95          2.18        1.3976    6   2   1         8
                68.29          4.61        1.3734    0   4   3         4
                69.28          5.04        1.3562    3   3   3         8
                70.47          1.28        1.3362    4   2   3         8
                70.86          2.74        1.3298    6   0   2         4
                71.76         10.65        1.3154    6   3   1         8
                71.81          5.47        1.3146    6   1   2         8
                71.82          6.90        1.3144    1   0   4         4
                72.61          1.82        1.3020    7   1   0         4
                74.33          2.09        1.2761    2   0   4         4
                75.36          6.75        1.2612    1   6   2         8
                75.57          1.01        1.2583    1   2   4         8
                77.56          2.47        1.2309    4   5   2         8
                77.61          1.22        1.2302    1   5   3         8
                77.84          5.16        1.2272    2   6   2         8
                82.53          1.62        1.1688    5   3   3         8
                84.14          1.02        1.1506    4   0   4         4
                84.86          4.76        1.1426    5   5   2         8
                85.04          2.49        1.1407    4   1   4         8
                87.55          2.48        1.1144    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.