Jadeite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern R050220
      Prewitt C T, Burnham C W
      American Mineralogist 51 (1966) 956-975
      The crystal structure of jadeite, NaAlSi2O6

      CELL PARAMETERS:   9.425775   8.568402   5.225526   90.00000   107.5655   90.00000
      SPACE GROUP: C2/c
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                14.30          5.08        6.2012    1   1   0
                19.78          1.59        4.4931    2   0   0
                20.43         12.93        4.3514   -1   1   1
                20.75         20.45        4.2842    0   2   0
                25.17          1.13        3.5404    1   1   1
                27.47         13.26        3.2483    0   2   1
                28.80         10.94        3.1006    2   2   0
                30.63        100.00        2.9192   -2   2   1
                31.63         27.57        2.8294   -3   1   1
                31.65         43.38        2.8276    3   1   0
                35.55          4.01        2.5256   -2   0   2
                36.06         39.18        2.4909    0   0   2
                36.13         17.41        2.4862   -1   3   1
                37.21         32.86        2.4163    2   2   1
                39.13          1.22        2.3018    1   3   1
                40.94         14.46        2.2043    3   1   1
                41.80         16.18        2.1610    1   1   2
                41.95          9.72        2.1534    0   2   2
                43.77         13.28        2.0678   -3   3   1
                43.79          6.63        2.0671    3   3   0
                44.27          6.32        2.0456   -4   2   1
                45.48          6.41        1.9943   -4   0   2
                46.12         19.43        1.9679    0   4   1
                46.72          3.03        1.9439    2   0   2
                47.14          3.39        1.9275   -1   3   2
                48.21          5.82        1.8872   -2   4   1
                49.59          2.16        1.8378   -5   1   1
                50.47          2.79        1.8080   -4   2   2
                51.97          6.74        1.7590    5   1   0
                51.97          1.91        1.7593    1   3   2
                54.10          1.04        1.6947   -1   1   3
                54.22          1.44        1.6914   -5   1   2
                54.50          7.82        1.6833    1   5   0
                55.61          6.60        1.6522   -3   1   3
                55.68          2.14        1.6504    3   1   2
                56.66          5.84        1.6241    0   4   2
                56.71          1.02        1.6228   -1   5   1
                57.20         13.87        1.6101   -2   2   3
                58.74         18.64        1.5712   -5   3   1
                59.62          8.11        1.5503    4   4   0
                61.89          5.23        1.4988   -6   0   2
                61.93          2.86        1.4977    6   0   0
                62.41          5.40        1.4875    3   5   0
                62.81         13.25        1.4790   -1   3   3
                63.00          1.50        1.4749   -6   2   1
                63.57          6.12        1.4631    4   0   2
                64.73          1.13        1.4395    2   4   2
                65.32          5.13        1.4281    0   6   0
                66.01          1.11        1.4147   -6   2   2
                67.64          3.98        1.3846    4   2   2
                68.30          1.35        1.3728    0   6   1
                68.42         12.73        1.3707   -3   5   2
                68.97         16.26        1.3610    5   3   1
                69.06          1.25        1.3595    1   5   2
                69.53          5.83        1.3514    2   2   3
                69.65          2.83        1.3494   -2   4   3
                72.77          3.59        1.2991   -5   3   3
                72.78          9.19        1.2988   -7   1   2
                73.86          6.85        1.2825   -3   1   4
                74.48          1.82        1.2734   -1   1   4
                74.65          1.02        1.2708    5   1   2
                74.74          1.41        1.2696    7   1   0
                74.81          3.28        1.2685    6   2   1
                76.44          4.02        1.2455    0   0   4
                76.61          2.87        1.2431   -2   6   2
                76.92          8.58        1.2389    0   6   2
                78.57          1.99        1.2169   -7   3   1
                79.25          1.45        1.2082    4   4   2
                79.87          7.93        1.2004    3   5   2
                80.74          1.82        1.1896   -1   7   1
                82.59          1.80        1.1676    1   7   1
                84.87          4.50        1.1419   -6   0   4
                86.02          1.06        1.1296   -6   4   3
                86.02          1.06        1.1296   -6   4   3
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.