Spodumene
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050252
      Cameron M, Sueno S, Prewitt C T, Papike J J
      American Mineralogist 58 (1973) 594-618
      High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite,
      spodumene, and ureyite
      T = 24 C
      pyroxene

      CELL PARAMETERS:   9.463000   8.392000   5.218000   90.00000   110.1500   90.00000
      SPACE GROUP: C2/c
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                14.53         14.40        6.1011    1   1   0
                19.99         11.17        4.4430    2   0   0
                20.39         24.37        4.3569   -1   1   1
                21.18         37.66        4.1958    0   2   0
                25.88         23.61        3.4430    1   1   1
                28.00         27.47        3.1870    0   2   1
                29.28          2.59        3.0505    2   2   0
                30.64        100.00        2.9181   -2   2   1
                31.28         10.70        2.8593   -3   1   1
                32.04         56.17        2.7931    3   1   0
                33.59          6.99        2.6681    1   3   0
                35.21          9.03        2.5490   -2   0   2
                36.64          2.64        2.4523   -1   3   1
                36.68         36.26        2.4499    0   0   2
                38.26         13.67        2.3519    2   2   1
                40.60          2.76        2.2215    4   0   0
                41.44          1.74        2.1785   -2   2   2
                42.12          5.97        2.1450    3   1   1
                42.73          1.34        2.1157    0   2   2
                42.90         17.59        2.1075    1   1   2
                43.97         10.17        2.0588   -3   3   1
                44.15          1.37        2.0510   -4   2   1
                44.54          2.47        2.0337    3   3   0
                44.61          2.93        2.0306   -4   0   2
                47.11         10.26        1.9286    0   4   1
                48.85         19.56        1.8639   -2   4   1
                49.33          7.06        1.8466   -5   1   1
                49.88          4.24        1.8278   -4   2   2
                51.11          2.30        1.7864   -3   3   2
                52.62          5.05        1.7387    5   1   0
                53.19          1.42        1.7215    2   2   2
                54.60          1.32        1.6802   -1   1   3
                55.12          2.00        1.6655   -3   1   3
                55.72          3.36        1.6492    1   5   0
                56.82          2.73        1.6198   -2   4   2
                57.32         16.22        1.6069   -2   2   3
                57.52          8.55        1.6016    3   1   2
                57.84          6.32        1.5935    0   4   2
                58.88         22.05        1.5677   -5   3   1
                60.69          7.32        1.5253    4   4   0
                60.90          1.93        1.5206   -6   0   2
                62.19          3.23        1.4919    1   1   3
                62.38          1.78        1.4880    5   1   1
                62.71          1.81        1.4810    6   0   0
                63.61          8.13        1.4620   -1   3   3
                63.63          2.55        1.4616   -5   1   3
                63.70          3.61        1.4602    3   5   0
                63.76          1.70        1.4591   -4   4   2
                65.23          1.15        1.4296   -6   2   2
                65.73          2.26        1.4200    4   0   2
                66.86          6.64        1.3986    0   6   0
                69.02          7.49        1.3601   -3   5   2
                69.91          1.11        1.3449    0   6   1
                69.90          4.09        1.3450    4   2   2
                70.26          6.97        1.3390   -2   4   3
                70.80         14.87        1.3301    5   3   1
                71.67          3.34        1.3161    2   2   3
                71.84         11.59        1.3135   -7   1   2
                71.99          2.69        1.3111   -5   3   3
                72.60          3.16        1.3015   -2   0   4
                73.61          3.84        1.2861   -3   1   4
                74.40          3.52        1.2745   -4   0   4
                75.74          1.97        1.2552    7   1   0
                76.77          1.47        1.2409    6   2   1
                77.21          2.54        1.2348    5   1   2
                77.86          3.91        1.2262   -2   6   2
                77.95          2.23        1.2250    0   0   4
                78.31          1.50        1.2202    5   5   0
                78.74          9.95        1.2146    0   6   2
                78.84          3.06        1.2134   -7   3   1
                80.86          1.14        1.1880    1   7   0
                82.39          6.81        1.1699    3   5   2
                82.64          1.48        1.1670   -1   7   1
                83.18          2.44        1.1607   -6   0   4
                83.60          1.11        1.1560    7   3   0
                84.34          1.20        1.1477    3   3   3
                86.48          1.82        1.1246   -7   3   3
                86.48          1.82        1.1246   -7   3   3
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.