Zincite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050419
      Kihara K, Donnay G
      The Canadian Mineralogist 23 (1985) 647-654
      Anharmonic thermal vibrations in ZnO
      Model: 2-c, at T = 293 K

      CELL PARAMETERS:   3.254908   3.254908   5.211905   90.00000   90.00000   120.0000
      SPACE GROUP: P6_3mc
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                31.76         52.55        2.8188    1   0   0
                34.42         39.77        2.6060    0   0   2
                36.24        100.00        2.4794    1   0   1
                47.51         21.60        1.9135    1   0   2
                56.54         31.17        1.6275    1   1   0
                62.81         28.09        1.4790    1   0   3
                66.30          4.24        1.4094    2   0   0
                67.88         23.70        1.3804    1   1   2
                69.00         12.05        1.3605    2   0   1
                72.52          1.99        1.3030    0   0   4
                76.87          3.74        1.2397    2   0   2
                81.31          2.02        1.1827    1   0   4
                89.50          7.92        1.0945    2   0   3
                89.50          7.92        1.0945    2   0   3
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.