Contributions to Mineralogy and Petrology

, Volume 157, Issue 1, pp 111–126

A pre-edge analysis of Mn K-edge XANES spectra to help determine the speciation of manganese in minerals and glasses

Original Paper

DOI: 10.1007/s00410-008-0323-z

Cite this article as:
Chalmin, E., Farges, F. & Brown, G.E. Contrib Mineral Petrol (2009) 157: 111. doi:10.1007/s00410-008-0323-z

Abstract

High-resolution manganese K-edge X-ray absorption near edge structure spectra were collected on a set of 40 Mn-bearing minerals. The pre-edge feature information (position, area) was investigated to extract as much as possible quantitative valence and symmetry information for manganese in various “test” and “unknown” minerals and glasses. The samples present a range of manganese symmetry environments (tetrahedral, square planar, octahedral, and cubic) and valences (II to VII). The extraction of the pre-edge information is based on a previous multiple scattering and multiplet calculations for model compounds. Using the method described in this study, a robust estimation of the manganese valence could be obtained from the pre-edge region at 5% accuracy level. This method applied to 20 “test” compounds (such as hausmannite and rancieite) and to 15 “unknown” compounds (such as axinite and birnessite) provides a quantitative estimate of the average valence of manganese in complex minerals and silicate glasses.

Keywords

ManganeseValenceSymmetryMineralGlassXANES pre-edge

Supplementary material

410_2008_323_MOESM1_ESM.pdf (9 kb)
MOESM1 [INSERT CAPTION HERE] (PDF 8 kb)
410_2008_323_MOESM2_ESM.pdf (17 kb)
MOESM2 [INSERT CAPTION HERE] (PDF 17 kb)

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.European Synchrotron Radiation FacilityGrenobleFrance
  2. 2.Unité Minéralogie-PétrologieMuséum National d’Histoire Naturelle and CNRS UMR 7160ParisFrance
  3. 3.Department of Geological and Environmental SciencesStanford UniversityStanfordUSA
  4. 4.Stanford Synchrotron Radiation LaboratorySLACMenlo ParkUSA