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New Insights in the Hydrothermal Synthesis of Rare-Earth Carbonates

The rare-earth carbonates represent a class of materials with great research interest owing to their intrinsic properties and because they can be used as template materials for the formation of other rare earth phases, particularly of rare-earth oxides. However, most of the literature is focused on...

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Autores principales: Spiridigliozzi, Luca, Ferone, Claudio, Cioffi, Raffaele, Bortolotti, Mauro, Dell’Agli, Gianfranco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6651494/
https://www.ncbi.nlm.nih.gov/pubmed/31252523
http://dx.doi.org/10.3390/ma12132062
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author Spiridigliozzi, Luca
Ferone, Claudio
Cioffi, Raffaele
Bortolotti, Mauro
Dell’Agli, Gianfranco
author_facet Spiridigliozzi, Luca
Ferone, Claudio
Cioffi, Raffaele
Bortolotti, Mauro
Dell’Agli, Gianfranco
author_sort Spiridigliozzi, Luca
collection PubMed
description The rare-earth carbonates represent a class of materials with great research interest owing to their intrinsic properties and because they can be used as template materials for the formation of other rare earth phases, particularly of rare-earth oxides. However, most of the literature is focused on the synthesis and characterization of hydroxycarbonates. Conversely, in the present study we have synthesized both rare-earth carbonates—with the chemical formula RE(2)(CO(3))(3)·2-3H(2)O, in which RE represents a generic rare-earth element, and a tengerite-type structure with a peculiar morphology—and rare-earth hydroxycarbonates with the chemical formula RECO(3)OH, by hydrothermal treatment at low temperature (120 °C), using metal nitrates and ammonium carbonates as raw materials, and without using any additive or template. We found that the nature of the rare-earth used plays a crucial role in relation to the formed phases, as predicted by the contraction law of lanthanides. In particular, the hydrothermal synthesis of rare-earth carbonates with a tengerite-type structure was obtained for the lanthanides from neodymium to erbium. A possible explanation of the different behaviors of lighter and heavier rare-earths is given.
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spelling pubmed-66514942019-08-08 New Insights in the Hydrothermal Synthesis of Rare-Earth Carbonates Spiridigliozzi, Luca Ferone, Claudio Cioffi, Raffaele Bortolotti, Mauro Dell’Agli, Gianfranco Materials (Basel) Article The rare-earth carbonates represent a class of materials with great research interest owing to their intrinsic properties and because they can be used as template materials for the formation of other rare earth phases, particularly of rare-earth oxides. However, most of the literature is focused on the synthesis and characterization of hydroxycarbonates. Conversely, in the present study we have synthesized both rare-earth carbonates—with the chemical formula RE(2)(CO(3))(3)·2-3H(2)O, in which RE represents a generic rare-earth element, and a tengerite-type structure with a peculiar morphology—and rare-earth hydroxycarbonates with the chemical formula RECO(3)OH, by hydrothermal treatment at low temperature (120 °C), using metal nitrates and ammonium carbonates as raw materials, and without using any additive or template. We found that the nature of the rare-earth used plays a crucial role in relation to the formed phases, as predicted by the contraction law of lanthanides. In particular, the hydrothermal synthesis of rare-earth carbonates with a tengerite-type structure was obtained for the lanthanides from neodymium to erbium. A possible explanation of the different behaviors of lighter and heavier rare-earths is given. MDPI 2019-06-27 /pmc/articles/PMC6651494/ /pubmed/31252523 http://dx.doi.org/10.3390/ma12132062 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Spiridigliozzi, Luca
Ferone, Claudio
Cioffi, Raffaele
Bortolotti, Mauro
Dell’Agli, Gianfranco
New Insights in the Hydrothermal Synthesis of Rare-Earth Carbonates
title New Insights in the Hydrothermal Synthesis of Rare-Earth Carbonates
title_full New Insights in the Hydrothermal Synthesis of Rare-Earth Carbonates
title_fullStr New Insights in the Hydrothermal Synthesis of Rare-Earth Carbonates
title_full_unstemmed New Insights in the Hydrothermal Synthesis of Rare-Earth Carbonates
title_short New Insights in the Hydrothermal Synthesis of Rare-Earth Carbonates
title_sort new insights in the hydrothermal synthesis of rare-earth carbonates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6651494/
https://www.ncbi.nlm.nih.gov/pubmed/31252523
http://dx.doi.org/10.3390/ma12132062
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