Ilmenite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R060149
      Wechsler B A, Prewitt C T
      American Mineralogist 69 (1984) 176-185
      Crystal structure of ilmenite (FeTiO3) at high temperature and high pressure
      24 deg C

      CELL PARAMETERS:   5.088400   5.088400   14.08550   90.00000   90.00000   120.0000
      SPACE GROUP: R-3
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                23.85         32.10        3.7378    0   1   2
                32.58        100.00        2.7521    1   0   4
                35.29         69.73        2.5460    1   1   0
                38.37          1.80        2.3481    0   0   6
                40.33          5.11        2.2382    2  -1   3
                40.33         18.32        2.2382    1   1   3
                41.49          1.61        2.1784    0   2   1
                43.02          1.76        2.1042    2   0   2
                48.75         36.91        1.8689    0   2   4
                53.08         28.35        1.7261    2  -1   6
                53.08         21.32        1.7261    1   1   6
                56.27          8.09        1.6355    0   1   8
                56.78          2.04        1.6220   -1   3   2
                61.57         12.41        1.5066    2   1   4
                61.57         17.37        1.5066    3  -1   4
                63.28         29.77        1.4699    3   0   0
                68.15          2.42        1.3760    2   0   8
                70.12         11.26        1.3420    1   0  10
                70.64          1.38        1.3335    1   1   9
                74.54          6.80        1.2730    2   2   0
                76.44          1.29        1.2459    0   3   6
                76.44          1.30        1.2459    3   0   6
                77.72          1.09        1.2286    4  -2   3
                79.10          2.17        1.2105   -1   3   8
                79.10          1.65        1.2105    1   2   8
                79.54          1.37        1.2050    3   1   2
                80.97          5.97        1.1872    0   2  10
                83.69          3.17        1.1554   -1   4   4
                83.69          5.24        1.1554    1   3   4
                87.06          3.60        1.1191    4  -2   6
                87.06          4.49        1.1191    2   2   6
                87.06          4.49        1.1191    2   2   6
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.