Investigation of Aluminate and Al₂O₃ Crystals and Melts at High Temperature Using XANES Spectroscopy

Daniel R. Neuville (1) , Laurent Cormier (2) , Jacques Roux (1) , Grant S. Henderson , Dominique de Ligny , Anne-Marie Flank (3) , Pierre Lagarde (3)

1 IPGP - Institut de Physique du Globe de Paris
2 IMPMC - Institut de minéralogie, de physique des matériaux et de cosmochimie
3 CNRS - Centre National de la Recherche Scientifique

Using X-ray absorption at the Al K-edge at high temperature, structural information was determined on Al₂O₃, CaAl₂O₄ (CA), Ca₃Al₂O₆ (C3A) and CaAl₂Si₂O₈ (anorthite) in the crystalline and liquid states (2380 K). Important changes are observed for Al₂O₃ where all oscillation in the XANES spectra disappear above the liquidus temperature. For the three other compositions some modifications of the XANES spectra can be attributed to changes in the Al coordination.

Keywords: 61.10.Ht; 61.43.Fs; 61.20.-p; X-ray absorption spectroscopy: EXAFS NEXAFS XANES etc.; Glasses; Structure of liquids

Domains: Sciences of the Universe [physics]

Daniel R. Neuville, Laurent Cormier, Jacques Roux, Grant S. Henderson, Dominique de Ligny, et al.. Investigation of Aluminate and Al₂O₃ Crystals and Melts at High Temperature Using XANES Spectroscopy. X-Ray Absorption Fine Structure - XAFS13: 13th International Conference. Proceedings held at Stanford, 0000, à renseigner, Unknown Region. pp.419-421, ⟨10.1063/1.2644545⟩. ⟨insu-03603196⟩