Pyrophanite
      Mitchell R H, Liferovich R P
      The Canadian Mineralogist 42 (2004) 1871-1880
      The pyrophanite-ecandrewsite solid-solution: crystal structures
      of the Mn1-xZnxSiO3 series (0.1 <= x <= 0.8)
      Sample: x = .1, ilmenite structure
      _database_code_amcsd 0005996

      CELL PARAMETERS:    5.1306   5.1306  14.2465   90.000   90.000  120.000
      SPACE GROUP: R-3       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    324.767
      Density (g/cm3):      4.658
      MAX. ABS. INTENSITY / VOLUME**2:      45.06698364    
      RIR:      3.150
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                23.60         26.55        3.7699    0   1   2         6
                32.21        100.00        2.7790    1   0   4         6
                34.98         66.13        2.5653    1   1   0         6
                37.50          1.25        2.3985    0   1   5         6
                39.94          6.38        2.2570    2  -1   3         6
                39.94         15.06        2.2570    1   1   3         6
                41.12          2.39        2.1951    0   2   1         6
                42.63          1.08        2.1209    2   0   2         6
                48.28         36.94        1.8850    0   2   4         6
                52.21          1.60        1.7520    2   0   5         6
                52.52         25.15        1.7425    2  -1   6         6
                52.52         17.00        1.7425    1   1   6         6
                55.60         10.04        1.6530    0   1   8         6
                56.28          1.99        1.6346   -1   3   2         6
                61.00         11.79        1.5190    2   1   4         6
                61.00         18.34        1.5190    3  -1   4         6
                62.73         28.69        1.4811    3   0   0         6
                67.40          2.95        1.3895    2   0   8         6
                69.26          9.50        1.3566    1   0  10         6
                69.82          3.47        1.3471    1   1   9         6
                73.89          6.86        1.2826    2   2   0         6
                78.24          2.86        1.2218   -1   3   8         6
                78.24          2.07        1.2218    1   2   8         6
                78.82          1.44        1.2143    3   1   2         6
                80.01          5.18        1.1992    0   2  10         6
                82.90          2.99        1.1646   -1   4   4         6
                82.90          5.84        1.1646    1   3   4         6
                86.18          2.86        1.1285    4  -2   6         6
                86.18          3.87        1.1285    2   2   6         6
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.