Cuprite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050374
      Hafner S S, Nagel S
      Physics and Chemistry of Minerals 9 (1983) 19-22
      The electric field gradient at the position of copper in
      Cu2O and electronic charge density analysis by means of K-factors

      CELL PARAMETERS:   4.270864   4.270864   4.270864   90.00000   90.00000   90.00000
      SPACE GROUP: Pn3
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                29.62          4.15        3.0200    1   1   0
                36.47        100.00        2.4658    1   1   1
                42.36         37.65        2.1354    2   0   0
                61.41         32.48        1.5100    2   2   0
                73.55         28.30        1.2877    3   1   1
                77.40          6.61        1.2329    2   2   2
                77.40          6.61        1.2329    2   2   2
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.