Temperature dependence of amorphous magnesium carbonate structure studied by PDF and XAFS analyses

Abstract Mineral trapping through the precipitation of carbonate minerals is a potential approach to reduce CO2 accumulation in the atmosphere. The temperature dependence of amorphous magnesium carbonate (AMC), a precursor of crystalline magnesium carbonate hydrates, was investigated using synchrotr...

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Autores principales:	Gen-ichiro Yamamoto, Atsushi Kyono, Satoru Okada
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d3c6e7ba2eb04b27a84943830a5f967e
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spelling	oai:doaj.org-article:d3c6e7ba2eb04b27a84943830a5f967e2021-11-28T12:18:05ZTemperature dependence of amorphous magnesium carbonate structure studied by PDF and XAFS analyses10.1038/s41598-021-02261-82045-2322https://doaj.org/article/d3c6e7ba2eb04b27a84943830a5f967e2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02261-8https://doaj.org/toc/2045-2322Abstract Mineral trapping through the precipitation of carbonate minerals is a potential approach to reduce CO2 accumulation in the atmosphere. The temperature dependence of amorphous magnesium carbonate (AMC), a precursor of crystalline magnesium carbonate hydrates, was investigated using synchrotron X-ray scattering experiments with atomic pair distribution function (PDF) and X-ray absorption fine structure analysis. PDF analysis revealed that there were no substantial structural differences among the AMC samples synthesized at 20, 60, and 80 °C. In addition, the medium-range order of all three AMC samples was very similar to that of hydromagnesite. Stirring in aqueous solution at room temperature caused the AMC sample to hydrate immediately and form a three-dimensional hydrogen-bonding network. Consequently, it crystallized with the long-range structural order of nesquehonite. The Mg K-edge X-ray absorption near-edge structure spectrum of AMC prepared at 20 °C was very similar to that of nesquehonite, implying that the electronic structure and coordination geometry of Mg atoms in AMC synthesized at 20 °C are highly similar to those in nesquehonite. Therefore, the short-range order (coordination environment) around the Mg atoms was slightly modified with temperature, but the medium-range order of AMC remained unchanged between 20 and 80 °C.Gen-ichiro YamamotoAtsushi KyonoSatoru OkadaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Gen-ichiro Yamamoto Atsushi Kyono Satoru Okada Temperature dependence of amorphous magnesium carbonate structure studied by PDF and XAFS analyses
description	Abstract Mineral trapping through the precipitation of carbonate minerals is a potential approach to reduce CO2 accumulation in the atmosphere. The temperature dependence of amorphous magnesium carbonate (AMC), a precursor of crystalline magnesium carbonate hydrates, was investigated using synchrotron X-ray scattering experiments with atomic pair distribution function (PDF) and X-ray absorption fine structure analysis. PDF analysis revealed that there were no substantial structural differences among the AMC samples synthesized at 20, 60, and 80 °C. In addition, the medium-range order of all three AMC samples was very similar to that of hydromagnesite. Stirring in aqueous solution at room temperature caused the AMC sample to hydrate immediately and form a three-dimensional hydrogen-bonding network. Consequently, it crystallized with the long-range structural order of nesquehonite. The Mg K-edge X-ray absorption near-edge structure spectrum of AMC prepared at 20 °C was very similar to that of nesquehonite, implying that the electronic structure and coordination geometry of Mg atoms in AMC synthesized at 20 °C are highly similar to those in nesquehonite. Therefore, the short-range order (coordination environment) around the Mg atoms was slightly modified with temperature, but the medium-range order of AMC remained unchanged between 20 and 80 °C.
format	article
author	Gen-ichiro Yamamoto Atsushi Kyono Satoru Okada
author_facet	Gen-ichiro Yamamoto Atsushi Kyono Satoru Okada
author_sort	Gen-ichiro Yamamoto
title	Temperature dependence of amorphous magnesium carbonate structure studied by PDF and XAFS analyses
title_short	Temperature dependence of amorphous magnesium carbonate structure studied by PDF and XAFS analyses
title_full	Temperature dependence of amorphous magnesium carbonate structure studied by PDF and XAFS analyses
title_fullStr	Temperature dependence of amorphous magnesium carbonate structure studied by PDF and XAFS analyses
title_full_unstemmed	Temperature dependence of amorphous magnesium carbonate structure studied by PDF and XAFS analyses
title_sort	temperature dependence of amorphous magnesium carbonate structure studied by pdf and xafs analyses
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d3c6e7ba2eb04b27a84943830a5f967e
work_keys_str_mv	AT genichiroyamamoto temperaturedependenceofamorphousmagnesiumcarbonatestructurestudiedbypdfandxafsanalyses AT atsushikyono temperaturedependenceofamorphousmagnesiumcarbonatestructurestudiedbypdfandxafsanalyses AT satoruokada temperaturedependenceofamorphousmagnesiumcarbonatestructurestudiedbypdfandxafsanalyses
_version_	1718408104696086528

Temperature dependence of amorphous magnesium carbonate structure studied by PDF and XAFS analyses

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