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 = .3, ilmenite structure
      _database_code_amcsd 0005997

      CELL PARAMETERS:    5.1189   5.1189  14.1741   90.000   90.000  120.000
      SPACE GROUP: R-3       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    321.649
      Density (g/cm3):      4.768
      MAX. ABS. INTENSITY / VOLUME**2:      48.67153762    
      RIR:      3.324
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                23.67         24.82        3.7584    0   1   2         6
                32.34        100.00        2.7679    1   0   4         6
                35.06         66.54        2.5595    1   1   0         6
                37.66          1.50        2.3883    0   1   5         6
                40.07          4.87        2.2505    2  -1   3         6
                40.07         15.80        2.2505    1   1   3         6
                41.22          2.67        2.1899    0   2   1         6
                42.74          1.07        2.1155    2   0   2         6
                48.44         36.52        1.8792    0   2   4         6
                49.49          1.17        1.8418    1   0   7         6
                52.40          1.64        1.7461    2   0   5         6
                52.73         23.69        1.7359    2  -1   6         6
                52.73         15.88        1.7359    1   1   6         6
                55.88         10.29        1.6452    0   1   8         6
                56.43          1.84        1.6306   -1   3   2         6
                61.19         18.05        1.5148    3  -1   4         6
                61.19         11.94        1.5148    2   1   4         6
                62.89         28.02        1.4777    3   0   0         6
                67.70          3.19        1.3840    2   0   8         6
                69.64          9.01        1.3501    1   0  10         6
                70.16          3.24        1.3413    1   1   9         6
                74.09          6.84        1.2797    2   2   0         6
                78.58          2.94        1.2174   -1   3   8         6
                78.58          2.22        1.2174    1   2   8         6
                79.04          1.30        1.2114    3   1   2         6
                80.42          4.96        1.1941    0   2  10         6
                83.16          3.13        1.1616   -1   4   4         6
                83.16          5.76        1.1616    1   3   4         6
                86.49          2.69        1.1252    4  -2   6         6
                86.49          3.65        1.1252    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.