Skip to content
Licensed Unlicensed Requires Authentication Published by De Gruyter April 1, 2015

Crystal structure of tooeleite, Fe6(AsO3)4SO4(OH)4·4H2O, a new iron arsenite oxyhydroxysulfate mineral relevant to acid mine drainage

  • Guillaume Morin EMAIL logo , Gwenaelle Rousse and Erik Elkaim
From the journal American Mineralogist

Abstract

The crystal structure of tooeleite, Fe6(AsO3)4(SO4)(OH)4·4H2O, has been solved from high-resolution synchrotron XRD powder data recorded on a sample from Tooele county, Utah. The structure is monoclinic, space group C2/m, a = 8.9575(1), b = 6.4238(1), c = 9.7912(1) Å, β = 96.032(1)°, V = 560.27(3) Å3, dcalc = 3.16 g/cm3. The structure was solved by direct methods and atomic positions, site occupancies, and isotropic displacement parameters were refined by the Rietveld method. The AsO3 pyramids bond to FeO6 octahedra by both edge- and corner-linkage, forming layers that intercalate SO4 groups. Assignment of structural H2O and OH groups were done from bond-valence analysis. Tooeleite is the only arsenite-sulfate mineral known and has been recently identified as the main constituent of stromatolite-like deposits in the Carnoulès acid mine, Gard, France.

Received: 2006-6-22
Accepted: 2006-8-14
Published Online: 2015-4-1
Published in Print: 2007-1-1

© 2015 by Walter de Gruyter Berlin/Boston

Downloaded on 29.3.2024 from https://www.degruyter.com/document/doi/10.2138/am.2007.2361/html
Scroll to top button