Georges Calas

Research.com Recognitions

• 2025 - Research.com Chemistry in France Leader Award
• 2022 - Research.com Chemistry in France Leader Award
• 2014 - Fellow of the Royal Society of Canada Academy of Science
• 2011 - Member of Academia Europaea

Overview

Best Publications

• EXAFS analysis of arsenite adsorption onto two-line ferrihydrite, hematite, goethite, and lepidocrocite.

  Georges Ona-Nguema;Guillaume Morin;Farid Juillot;Georges Calas

  464
  Citations

• Pressure-induced coordination changes in crystalline and vitreous GeO2.

  J. P. Itie;J. P. Itie;A. Polian;A. Polian;G. Calas;G. Calas;J. Petiau;J. Petiau

  451
  Citations

• X-ray absorption spectroscopy; applications in mineralogy and geochemistry

  Gordon E. Brown;Georges Calas;Glenn A. Waychunas;Jacqueline Petiau

  331
  Citations

• X-ray scattering and X-ray spectroscopy studies of silicate melts

  G. E. Brown;F. Farges;G. Calas

  331
  Citations

• First-principles modeling of the infrared spectrum of kaolinite

  Etienne Balan;A. Marco Saitta;Francesco Mauri;Georges Calas

  313
  Citations

• Coordination of iron in oxide glasses through high-resolution K-edge spectra: Information from the pre-edge

  G. Calas;J. Petiau

  304
  Citations

• Trace element distribution coefficients in alkaline series

  Fabienne Lemarchand;Benoît Villemant;Georges Calas

  304
  Citations

• XAFS determination of the chemical form of lead in smelter-contaminated soils and mine tailings; importance of adsorption processes

  Guillaume Morin;John D. Ostergren;Farid Juillot;Philippe Ildefonse

  292
  Citations

• Bacterial formation of tooeleite and mixed arsenic(III) or arsenic(V)-iron(III) gels in the Carnoulès acid mine drainage, France. A XANES, XRD, and SEM study.

  Guillaume Morin;Farid Juillot;Corinne Casiot;Odile Bruneel

  262
  Citations

• Formation of ferric oxides from aqueous solutions: A polyhedral approach by X-ray absorption spectroscdpy: I. Hydrolysis and formation of ferric gels

  J.M. Combes;A. Manceau;G. Calas;J.Y. Bottero

  262
  Citations

• High-resolution XANES spectra of iron in minerals and glasses: structural information from the pre-edge region

  L Galoisy;G Calas;M.A Arrio

  256
  Citations

• Arsenic in Soils, Mine Tailings, and Former Industrial Sites

  Guillaume Morin;Georges Calas

  246
  Citations

• The effect of redox state on the local structural environment of iron in silicate glasses: A combined XAFS spectroscopy, molecular dynamics, and bond valence study

  François Farges;François Farges;Yannick Lefrère;Yannick Lefrère;Stéphanie Rossano;Anne Berthereau

  228
  Citations

• X-ray-absorption near-edge structure of 3d transition elements in tetrahedral coordination: The effect of bond-length variation

  A. Bianconi;E. Fritsch;G. Calas;J. Petiau

  220
  Citations

• Unraveling the atomic structure of biogenic silica: evidence of the structural association of Al and Si in diatom frustules

  M. Gehlen;L. Beck;G. Calas;A.-M. Flank

  214
  Citations

• XANES Evidence for Rapid Arsenic(III) Oxidation at Magnetite and Ferrihydrite Surfaces by Dissolved O2 via Fe2+-Mediated Reactions

  Georges Ona-Nguema;Guillaume Morin;Yuheng Wang;Andrea L. Foster

  203
  Citations

• Chemical dependence of network topology of calcium aluminosilicate glasses: a computer simulation study.

  Laurent Cormier;Dominique Ghaleb;Daniel R. Neuville;Jean-Marc Delaye

  194
  Citations

• STRUCTURAL ENVIRONMENTS OF INCOMPATIBLE ELEMENTS IN SILICATE GLASS/MELT SYSTEMS. II: UIV, UV, AND UVI

  Franã§Ois Farges;Franã§Ois Farges;Carl W. Ponader;Georges Calas;Gordon E. Brown

  190
  Citations

• Aluminium X-ray absorption Near Edge Structure in model compounds and Earth’s surface minerals

  P. Ildefonse;D. Cabaret;P. Sainctavit;G. Calas

  188
  Citations

• Crystal chemistry of cobalt and nickel in lithiophorite and asbolane from New Caledonia

  A. Manceau;S. Llorca;G. Calas

  187
  Citations