Graphite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050503
      Wyckoff R W G
      Crystal Structures 1 (1963) 7-83
      Second edition. Interscience Publishers, New York, New York

      CELL PARAMETERS:   2.456000   2.456000   6.696000   90.00000   90.00000   120.0000
      SPACE GROUP: P6_3mc
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                26.74        100.00        3.3566    0   0   2
                42.77          3.45        2.1220    1   0   0
                44.96         16.94        2.0233    1   0   1
                51.07          3.34        1.7936    1   0   2
                54.84          6.55        1.6783    0   0   4
                60.24          5.09        1.5398    1   0   3
                78.12          1.77        1.2251    1   1   0
                84.23          2.86        1.1509    1   1   2
                85.72          1.53        1.1346    1   0   5
                87.22          1.30        1.1189    0   0   6
                87.22          1.30        1.1189    0   0   6
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.