Delafossite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050403
      Pabst A
      American Mineralogist 23 (1938) 175-176
      Crystal structure and density of delafossite

      CELL PARAMETERS:   5.979005   5.979005   5.979005   29.33601   29.33601   29.33601
      SPACE GROUP: R-3m
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                15.48          1.58        5.7177    1   1   1
                31.26         33.53        2.8589    2   2   2
                34.57          7.77        2.5922    1   0   0
                35.78        100.00        2.5077    1   1   0
                40.28         37.91        2.2372    2   1   1
                43.40          1.03        2.0834    2   2   1
                61.16         22.92        1.5140    0  -1   1
                72.93          8.89        1.2961    2   0   0
                75.80          4.92        1.2539    2   2   0
                75.80          4.92        1.2539    2   2   0
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.