Ruiqi Chen, Oleg I. Siidra, Valery L. Ugolkov, Vera A. Firsova, Natalia S. Vlasenko, Angel M. Arevalo-Lopez, Marie Colmont, Vladimir N. Bocharov
{"title":"Thermal evolution of metamict davidite-(La) from the Radium Hill, Australia: recrystallization and thermal expansion","authors":"Ruiqi Chen, Oleg I. Siidra, Valery L. Ugolkov, Vera A. Firsova, Natalia S. Vlasenko, Angel M. Arevalo-Lopez, Marie Colmont, Vladimir N. Bocharov","doi":"10.1007/s00269-024-01274-9","DOIUrl":null,"url":null,"abstract":"<div><p>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: <span>\\(\\overline{\\mathrm{\\alpha }}\\)</span> <sub><i>a</i></sub> = <span>\\(\\overline{\\mathrm{\\alpha }}\\)</span> <sub><i>b</i></sub> = 9.96 (3) × 10<sup>–6</sup> ºC<sup>−1</sup>; <span>\\(\\overline{\\mathrm{\\alpha }}\\)</span> <sub><i>c</i></sub> = 10.79 (4) × 10<sup>–6</sup> ºC<sup>−1</sup>. The character of the thermal expansion is in agreement with the structure characterized by layers stacked along the <i>c</i> axis. The volume TEC α<sub><i>V</i></sub> = 24.81 (47)—36.80 (48) × 10<sup>–6</sup> ºC<sup>−1</sup>. 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.</p></div>","PeriodicalId":20132,"journal":{"name":"Physics and Chemistry of Minerals","volume":"51 2","pages":""},"PeriodicalIF":1.2000,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics and Chemistry of Minerals","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1007/s00269-024-01274-9","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
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: \(\overline{\mathrm{\alpha }}\)a = \(\overline{\mathrm{\alpha }}\)b = 9.96 (3) × 10–6 ºC−1; \(\overline{\mathrm{\alpha }}\)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.
期刊介绍:
Physics and Chemistry of Minerals is an international journal devoted to publishing articles and short communications of physical or chemical studies on minerals or solids related to minerals. The aim of the journal is to support competent interdisciplinary work in mineralogy and physics or chemistry. Particular emphasis is placed on applications of modern techniques or new theories and models to interpret atomic structures and physical or chemical properties of minerals. Some subjects of interest are:
-Relationships between atomic structure and crystalline state (structures of various states, crystal energies, crystal growth, thermodynamic studies, phase transformations, solid solution, exsolution phenomena, etc.)
-General solid state spectroscopy (ultraviolet, visible, infrared, Raman, ESCA, luminescence, X-ray, electron paramagnetic resonance, nuclear magnetic resonance, gamma ray resonance, etc.)
-Experimental and theoretical analysis of chemical bonding in minerals (application of crystal field, molecular orbital, band theories, etc.)
-Physical properties (magnetic, mechanical, electric, optical, thermodynamic, etc.)
-Relations between thermal expansion, compressibility, elastic constants, and fundamental properties of atomic structure, particularly as applied to geophysical problems
-Electron microscopy in support of physical and chemical studies
-Computational methods in the study of the structure and properties of minerals
-Mineral surfaces (experimental methods, structure and properties)