Hydrotalcite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050328
      Allmann R, Jepsen H P
      Neues Jahrbuch fur Mineralogie, Monatshefte 1969 (1969) 544-551
      Die struktur des hydrotalkits
      Locality: Vezna, Western Moravia

      CELL PARAMETERS:   3.086830   3.086830   23.51734   90.00000   90.00000   120.0000
      SPACE GROUP: R-3m
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                11.40        100.00        7.8391    0   0   3
                22.79         34.54        3.9196    0   0   6
                33.84          2.25        2.6562    1   0   1
                34.50         30.60        2.6068    0   1   2
                34.41          1.89        2.6130    0   0   9
                38.84         25.32        2.3241    0   1   5
                45.97         30.73        1.9778    0   1   8
                51.85          7.34        1.7657    1   0  10
                55.07          4.76        1.6697    0   1  11
                60.00          9.67        1.5434    1   1   0
                61.27          9.24        1.5143    1   1   3
                62.00          4.12        1.4982    1   0  13
                65.00          3.00        1.4361    1   1   6
                65.71          1.49        1.4223    0   1  14
                71.03          1.18        1.3281    2   0   2
                73.74          2.66        1.2857    2   0   5
                73.59          3.41        1.2880    1   0  16
                78.68          2.37        1.2168    2   0   8
                85.76          1.12        1.1334    2   0  11
                85.76          1.12        1.1334    2   0  11
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.