Journal of

GEOsciences

  (Formerly Journal of the Czech Geological Society)

Original Paper

Stuart J. Mills, Pamela S. Whitfield, Anthony R. Kampf, Siobhan A. Wilson, Gregory M. Dipple, Mati Raudsepp, Georges Favreau

Contribution to the crystallography of hydrotalcites: the crystal structures of woodallite and takovite

Journal of Geosciences, volume 57 (2012), issue 4, 273 - 279

DOI: http://doi.org/10.3190/jgeosci.127

The crystal structures of the 3R polytypes of takovite and woodallite are presented. The structure of takovite was solved on a single crystal from the Agoudal mine, Bou Azzer district, Tazenakht, Morocco to R₁ = 1.87 % for 94 unique reflections [F_o>4σF] in R-3m, with unit cell parameters a = 3.0290(2) and c = 22.5995(15) Å. The crystal structure of woodallite [space group R-3m, with unit cell parameters a = 3.10124(8) and c = 23.6817(16) Å] was refined utilising the Rietveld method on a sample from the MKD5 orebody at the Mount Keith Nickel Mine, Western Australia.