Theoretical infrared signature of OH defects ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Theoretical infrared signature of OH defects in Fe3+, Cr3+ and Al3+-doped enstatite
Auteur(s) :
Balan, Etienne [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Ingrin, Jannick [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Ingrin, Jannick [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Titre de la revue :
Physics and Chemistry of Minerals
Nom court de la revue :
Phys Chem Minerals
Numéro :
51
Éditeur :
Springer Science and Business Media LLC
Date de publication :
2024-07-20
ISSN :
0342-1791
Mot(s)-clé(s) en anglais :
Enstatite
FTIR spectroscopy
OH defects
Ab initio modeling
FTIR spectroscopy
OH defects
Ab initio modeling
Discipline(s) HAL :
Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Physique [physics]/Géophysique [physics.geo-ph]
Physique [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Sciences de la Terre
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Physique [physics]/Géophysique [physics.geo-ph]
Physique [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Sciences de la Terre
Résumé en anglais : [en]
The infrared spectroscopic properties of selected defects involving one proton and one
nearby M3+ (M=Al, Cr, Fe) substitution in orthoenstatite are investigated by first-principles
calculations. Based on the theoretical ...
Lire la suite >The infrared spectroscopic properties of selected defects involving one proton and one nearby M3+ (M=Al, Cr, Fe) substitution in orthoenstatite are investigated by first-principles calculations. Based on the theoretical results, the absorption bands experimentally observed on synthetic samples with high crystalline quality and low doping levels can be assigned to specific defect configurations. Most of them correspond to Mg vacancies at M2 sites locally compensated by one proton and one M3+ cation at a nearby M1 site. This confirms that the M3+ + H+ = 2 Mg2+ exchange mechanism is the dominant hydrogen incorporation mechanism at the lowest concentration levels in doped enstatite. At higher concentration levels, more complex incorporation mechanisms could become dominant in Al-bearing samples.Lire moins >
Lire la suite >The infrared spectroscopic properties of selected defects involving one proton and one nearby M3+ (M=Al, Cr, Fe) substitution in orthoenstatite are investigated by first-principles calculations. Based on the theoretical results, the absorption bands experimentally observed on synthetic samples with high crystalline quality and low doping levels can be assigned to specific defect configurations. Most of them correspond to Mg vacancies at M2 sites locally compensated by one proton and one M3+ cation at a nearby M1 site. This confirms that the M3+ + H+ = 2 Mg2+ exchange mechanism is the dominant hydrogen incorporation mechanism at the lowest concentration levels in doped enstatite. At higher concentration levels, more complex incorporation mechanisms could become dominant in Al-bearing samples.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
INRAE
ENSCL
CNRS
INRAE
ENSCL
Collections :
Équipe(s) de recherche :
Matériaux Terrestres et Planétaires
Date de dépôt :
2024-08-09T13:58:53Z
2024-08-20T13:36:09Z
2024-08-20T13:36:09Z
Fichiers
- Balan & Ingrin_2024_v2_preprint.pdf
- Version soumise (preprint)
- Accès restreint 2025-01-20
- Accéder au document