Thermal evolution of metamict davidite-(La) ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Thermal evolution of metamict davidite-(La) from the Radium Hill, Australia: recrystallization and thermal expansion
Auteur(s) :
Chen, Ruiqi [Auteur]
St Petersburg State University [SPbU]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Siidra, O. I. [Auteur]
St. Petersburg State University of Telecommunication
Ugolkov, V. L. [Auteur]
Russian Academy of Sciences [Moscow] [RAS]
Firsova, V. A. [Auteur]
Russian Academy of Sciences [Moscow] [RAS]
Vlasenko, N. S. [Auteur]
Arevalo Lopez, Angel [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Colmont, Marie [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Bocharov, V. N. [Auteur]
St Petersburg State University [SPbU]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Siidra, O. I. [Auteur]
St. Petersburg State University of Telecommunication
Ugolkov, V. L. [Auteur]
Russian Academy of Sciences [Moscow] [RAS]
Firsova, V. A. [Auteur]
Russian Academy of Sciences [Moscow] [RAS]
Vlasenko, N. S. [Auteur]
Arevalo Lopez, Angel [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Colmont, Marie [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Bocharov, V. N. [Auteur]
Titre de la revue :
Phys. Chem. Miner.
Nom court de la revue :
Phys. Chem. Miner.
Numéro :
51
Pagination :
-
Date de publication :
2024-05-06
ISSN :
0342-1791
Mot(s)-clé(s) en anglais :
Metamict minerals
Davidite- (La)
Crichtonite group minerals
Thermal expansion
Davidite- (La)
Crichtonite group minerals
Thermal expansion
Discipline(s) HAL :
Chimie/Chimie inorganique
Résumé en anglais : [en]
Aside from its economic value, davidite and its synthetic analogs may have potential applications in materials science. The unique properties of the crichtonite group minerals, including davidite-(La), make them attractive ...
Lire la suite >Aside from its economic value, davidite and its synthetic analogs may have potential applications in materials science. The unique properties of the crichtonite group minerals, including davidite-(La), make them attractive candidates for high-level waste (HLW) immobilization. We studied the thermal evolution of the metamict davidite-(La) from the Radium Hill, Australia. The investigation of the temperature-induced crystallization process was conducted, and the thermal expansion coefficients (TEC) for the recrystallized davidite (RD) were determined for the first time. Our results demonstrate that RD has relatively low TEC indicating its thermophysical stability. The following TECs of davidite- (La) for the temperature range 25–1200 °C were obtained: a = b = 9.96 (3) × 10–6 ºC−1; c = 10.79 (4) × 10–6 ºC−1. The character of the thermal expansion is in agreement with the structure characterized by layers stacked along the c axis. The volume TEC αV = 24.81 (47)—36.80 (48) × 10–6 ºC−1. Davidite-(La) exhibits an almost isotropic thermal expansion and shows one of the most superior thermal performances in comparison to the other mineral-like phases utilized for the immobilization of HLW.Lire moins >
Lire la suite >Aside from its economic value, davidite and its synthetic analogs may have potential applications in materials science. The unique properties of the crichtonite group minerals, including davidite-(La), make them attractive candidates for high-level waste (HLW) immobilization. We studied the thermal evolution of the metamict davidite-(La) from the Radium Hill, Australia. The investigation of the temperature-induced crystallization process was conducted, and the thermal expansion coefficients (TEC) for the recrystallized davidite (RD) were determined for the first time. Our results demonstrate that RD has relatively low TEC indicating its thermophysical stability. The following TECs of davidite- (La) for the temperature range 25–1200 °C were obtained: a = b = 9.96 (3) × 10–6 ºC−1; c = 10.79 (4) × 10–6 ºC−1. The character of the thermal expansion is in agreement with the structure characterized by layers stacked along the c axis. The volume TEC αV = 24.81 (47)—36.80 (48) × 10–6 ºC−1. Davidite-(La) exhibits an almost isotropic thermal expansion and shows one of the most superior thermal performances in comparison to the other mineral-like phases utilized for the immobilization of HLW.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois
CNRS
Centrale Lille
ENSCL
Univ. Artois
Collections :
Équipe(s) de recherche :
Matériaux inorganiques, structures, systèmes et propriétés (MISSP)
Date de dépôt :
2024-05-18T21:07:51Z
2024-05-31T08:04:08Z
2024-05-31T08:04:08Z