Synthesis and characterization of Leucite using a diatomite precursor

Leucite is nowadays an important component in ceramic restoration systems with particular suitability to dental porcelains. The leucite synthesis from a hydrothermally-derived precursor is here presented. A silicate solution was prepared by mixing a naturally derived amorphous silica (diatomitic roc...

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Autores: Novembre, Daniela, Gimeno Torrente, Domingo, Poe, Brent
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/162571
Acceso en línea:https://hdl.handle.net/2445/162571
Access Level:acceso abierto
Palabra clave:Mineralogia
Jaciments hidrotermals
Hidroxiàcids
Cristal·lització
Mineralogy
Hydrothermal deposits
Hydroxy acids
Crystallization
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spelling Synthesis and characterization of Leucite using a diatomite precursorNovembre, DanielaGimeno Torrente, DomingoPoe, BrentMineralogiaJaciments hidrotermalsHidroxiàcidsCristal·litzacióMineralogyHydrothermal depositsHydroxy acidsCrystallizationLeucite is nowadays an important component in ceramic restoration systems with particular suitability to dental porcelains. The leucite synthesis from a hydrothermally-derived precursor is here presented. A silicate solution was prepared by mixing a naturally derived amorphous silica (diatomitic rock from Crotone, southern Italy) with potassium hydroxide and an aluminate solution was obtained by mixing aluminium hydroxide and potassium hydroxide. Three mixtures of varying ratios of aluminate and silicate solutions were prepared and submitted to hydrothermal treatment at 150 °C for one hour. Subsequently these hydrothermal precursors were subjected to calcination at the temperature of 1000 °C for variable time intervals, thus resulting in 3 series of syntheses. The synthesis run 3 turned out to be the best from the point of view of temporal yield showing the crystallization of the leucite after only 15 hours of heat treatment. The products of synthesis run 3 were fully characterised by Powder X-Ray Diffraction, Inductively Coupled Plasma Optical Emission Spectrometry, Infrared Spectroscopy and Thermal Analysis. The amorphous phase in the synthesis powders was estimated by quantitative phase analysis using the combined Rietveld and reference intensity ratio methods. Density of leucite was also achieved by He-pycnometry. The use of a cost effective starting material such as a diatomite in the experimental route makes the process highly attractive for expansion to an industrial scale especially considering that both the chemical and physical characterizations of our leucite product are highly satisfactory. Last but not least we explain some inferences that can be obtained from this process of synthesis in order to a better understanding of some natural occurrences of leucite in geologic systems related to basaltic magmas.Nature Publishing Group2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/162571Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1038/s41598-019-46569-yScientific Reports, 2019, vol. 9, p. 10051https://doi.org/10.1038/s41598-019-46569-ycc-by (c) Novembre, Daniela et al., 2019http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1625712026-05-27T06:46:51Z
dc.title.none.fl_str_mv Synthesis and characterization of Leucite using a diatomite precursor
title Synthesis and characterization of Leucite using a diatomite precursor
spellingShingle Synthesis and characterization of Leucite using a diatomite precursor
Novembre, Daniela
Mineralogia
Jaciments hidrotermals
Hidroxiàcids
Cristal·lització
Mineralogy
Hydrothermal deposits
Hydroxy acids
Crystallization
title_short Synthesis and characterization of Leucite using a diatomite precursor
title_full Synthesis and characterization of Leucite using a diatomite precursor
title_fullStr Synthesis and characterization of Leucite using a diatomite precursor
title_full_unstemmed Synthesis and characterization of Leucite using a diatomite precursor
title_sort Synthesis and characterization of Leucite using a diatomite precursor
dc.creator.none.fl_str_mv Novembre, Daniela
Gimeno Torrente, Domingo
Poe, Brent
author Novembre, Daniela
author_facet Novembre, Daniela
Gimeno Torrente, Domingo
Poe, Brent
author_role author
author2 Gimeno Torrente, Domingo
Poe, Brent
author2_role author
author
dc.subject.none.fl_str_mv Mineralogia
Jaciments hidrotermals
Hidroxiàcids
Cristal·lització
Mineralogy
Hydrothermal deposits
Hydroxy acids
Crystallization
topic Mineralogia
Jaciments hidrotermals
Hidroxiàcids
Cristal·lització
Mineralogy
Hydrothermal deposits
Hydroxy acids
Crystallization
description Leucite is nowadays an important component in ceramic restoration systems with particular suitability to dental porcelains. The leucite synthesis from a hydrothermally-derived precursor is here presented. A silicate solution was prepared by mixing a naturally derived amorphous silica (diatomitic rock from Crotone, southern Italy) with potassium hydroxide and an aluminate solution was obtained by mixing aluminium hydroxide and potassium hydroxide. Three mixtures of varying ratios of aluminate and silicate solutions were prepared and submitted to hydrothermal treatment at 150 °C for one hour. Subsequently these hydrothermal precursors were subjected to calcination at the temperature of 1000 °C for variable time intervals, thus resulting in 3 series of syntheses. The synthesis run 3 turned out to be the best from the point of view of temporal yield showing the crystallization of the leucite after only 15 hours of heat treatment. The products of synthesis run 3 were fully characterised by Powder X-Ray Diffraction, Inductively Coupled Plasma Optical Emission Spectrometry, Infrared Spectroscopy and Thermal Analysis. The amorphous phase in the synthesis powders was estimated by quantitative phase analysis using the combined Rietveld and reference intensity ratio methods. Density of leucite was also achieved by He-pycnometry. The use of a cost effective starting material such as a diatomite in the experimental route makes the process highly attractive for expansion to an industrial scale especially considering that both the chemical and physical characterizations of our leucite product are highly satisfactory. Last but not least we explain some inferences that can be obtained from this process of synthesis in order to a better understanding of some natural occurrences of leucite in geologic systems related to basaltic magmas.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/162571
url https://hdl.handle.net/2445/162571
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1038/s41598-019-46569-y
Scientific Reports, 2019, vol. 9, p. 10051
https://doi.org/10.1038/s41598-019-46569-y
dc.rights.none.fl_str_mv cc-by (c) Novembre, Daniela et al., 2019
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Novembre, Daniela et al., 2019
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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