Structural evolution of calcite at high temperatures: Phase V unveiled

The calcite form of calcium carbonate CaCO(3) undergoes a reversible phase transition between R[Image: see text]c and R[Image: see text]m at ~1240 K under a CO(2) atmosphere of ~0.4 MPa. The joint probability density function obtained from the single-crystal X-ray diffraction data revealed that the...

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Autores principales: Ishizawa, Nobuo, Setoguchi, Hayato, Yanagisawa, Kazumichi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2013
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3788374/
https://www.ncbi.nlm.nih.gov/pubmed/24084871
http://dx.doi.org/10.1038/srep02832
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author Ishizawa, Nobuo
Setoguchi, Hayato
Yanagisawa, Kazumichi
author_facet Ishizawa, Nobuo
Setoguchi, Hayato
Yanagisawa, Kazumichi
author_sort Ishizawa, Nobuo
collection PubMed
description The calcite form of calcium carbonate CaCO(3) undergoes a reversible phase transition between R[Image: see text]c and R[Image: see text]m at ~1240 K under a CO(2) atmosphere of ~0.4 MPa. The joint probability density function obtained from the single-crystal X-ray diffraction data revealed that the oxygen triangles of the CO(3) group in the high temperature form (Phase V) do not sit still at specified positions in the space group R[Image: see text]m, but migrate along the undulated circular orbital about carbon. The present study also shows how the room temperature form (Phase I) develops into Phase V through an intermediate form (Phase IV) in the temperature range between ~985 K and ~1240 K.
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spelling pubmed-37883742013-10-18 Structural evolution of calcite at high temperatures: Phase V unveiled Ishizawa, Nobuo Setoguchi, Hayato Yanagisawa, Kazumichi Sci Rep Article The calcite form of calcium carbonate CaCO(3) undergoes a reversible phase transition between R[Image: see text]c and R[Image: see text]m at ~1240 K under a CO(2) atmosphere of ~0.4 MPa. The joint probability density function obtained from the single-crystal X-ray diffraction data revealed that the oxygen triangles of the CO(3) group in the high temperature form (Phase V) do not sit still at specified positions in the space group R[Image: see text]m, but migrate along the undulated circular orbital about carbon. The present study also shows how the room temperature form (Phase I) develops into Phase V through an intermediate form (Phase IV) in the temperature range between ~985 K and ~1240 K. Nature Publishing Group 2013-10-02 /pmc/articles/PMC3788374/ /pubmed/24084871 http://dx.doi.org/10.1038/srep02832 Text en Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareALike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
spellingShingle Article
Ishizawa, Nobuo
Setoguchi, Hayato
Yanagisawa, Kazumichi
Structural evolution of calcite at high temperatures: Phase V unveiled
title Structural evolution of calcite at high temperatures: Phase V unveiled
title_full Structural evolution of calcite at high temperatures: Phase V unveiled
title_fullStr Structural evolution of calcite at high temperatures: Phase V unveiled
title_full_unstemmed Structural evolution of calcite at high temperatures: Phase V unveiled
title_short Structural evolution of calcite at high temperatures: Phase V unveiled
title_sort structural evolution of calcite at high temperatures: phase v unveiled
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3788374/
https://www.ncbi.nlm.nih.gov/pubmed/24084871
http://dx.doi.org/10.1038/srep02832
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