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Observation of Sb2S3-type post-post-perovskite in NaFeF3. Implications for ABX3 and A2X3 systems at ultrahigh pressure

Serena Margadonna Orcid Logo

Mineralogical Magazine, Volume: 80, Issue: 4, Pages: 659 - 674

Swansea University Author: Serena Margadonna Orcid Logo

DOI (Published version): 10.1180/minmag.2016.080.017

Abstract

Ten years have passed since the description of the perovskite to post-perovskite transition in MgSiO3 and its’ impact on the mineralogy and rheology of the D’’ region at the base of the Earth’s mantle. Much work has explored the mechanisms operating during this transformation and their influence on...

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Published in: Mineralogical Magazine
Published: 2016
Online Access: http://minmag.geoscienceworld.org/content/80/4/659.full.pdf+html
URI: https://cronfa.swan.ac.uk/Record/cronfa29037
first_indexed 2016-06-30T18:30:41Z
last_indexed 2018-03-28T04:21:00Z
id cronfa29037
recordtype SURis
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spelling 2018-03-26T10:38:42.9631855 v2 29037 2016-06-30 Observation of Sb2S3-type post-post-perovskite in NaFeF3. Implications for ABX3 and A2X3 systems at ultrahigh pressure e31904a10b1b1240b98ab52d9977dfbe 0000-0002-6996-6562 Serena Margadonna Serena Margadonna true false 2016-06-30 EAAS Ten years have passed since the description of the perovskite to post-perovskite transition in MgSiO3 and its’ impact on the mineralogy and rheology of the D’’ region at the base of the Earth’s mantle. Much work has explored the mechanisms operating during this transformation and their influence on seismic response. In parallel, calculations in ABX3 systems have identified potential structures for a denser post-post-perovskite phase occurring at higher pressures. However, experiments have yet to elucidate any higher pressure form, beyond the CaIrO3-type. Here we describe the structures and transformations that lead to the crystallisation of a post-post-perovskite of Sb2S3-type in a GdFeO3-type fluoroperovskite at high pressure conditions. The use of single-crystal techniques gives unique access to the relative crystallographic orientations of all polymorphs. We use this information to extend this description to include other calculated and observed forms that are competitive in ABX3 and A2X3 stoichiometries (e.g. Sb2S3, -Gd2S3, Be3N2,) and provide substantial information on inter-relationships between these structures. Such information is critical to the interpretation of transition mechanisms, predicting transition sequences and to the expression of directional properties in those transformed structures. Journal Article Mineralogical Magazine 80 4 659 674 perovskite, post-perovskite, crystallography, high pressure 1 6 2016 2016-06-01 10.1180/minmag.2016.080.017 http://minmag.geoscienceworld.org/content/80/4/659.full.pdf+html COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University 2018-03-26T10:38:42.9631855 2016-06-30T13:29:08.3028049 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Serena Margadonna 0000-0002-6996-6562 1 0029037-26032018103715.pdf 29037.pdf 2018-03-26T10:37:15.1970000 Output 994578 application/pdf Accepted Manuscript true 2016-06-30T00:00:00.0000000 true eng
title Observation of Sb2S3-type post-post-perovskite in NaFeF3. Implications for ABX3 and A2X3 systems at ultrahigh pressure
spellingShingle Observation of Sb2S3-type post-post-perovskite in NaFeF3. Implications for ABX3 and A2X3 systems at ultrahigh pressure
Serena Margadonna
title_short Observation of Sb2S3-type post-post-perovskite in NaFeF3. Implications for ABX3 and A2X3 systems at ultrahigh pressure
title_full Observation of Sb2S3-type post-post-perovskite in NaFeF3. Implications for ABX3 and A2X3 systems at ultrahigh pressure
title_fullStr Observation of Sb2S3-type post-post-perovskite in NaFeF3. Implications for ABX3 and A2X3 systems at ultrahigh pressure
title_full_unstemmed Observation of Sb2S3-type post-post-perovskite in NaFeF3. Implications for ABX3 and A2X3 systems at ultrahigh pressure
title_sort Observation of Sb2S3-type post-post-perovskite in NaFeF3. Implications for ABX3 and A2X3 systems at ultrahigh pressure
author_id_str_mv e31904a10b1b1240b98ab52d9977dfbe
author_id_fullname_str_mv e31904a10b1b1240b98ab52d9977dfbe_***_Serena Margadonna
author Serena Margadonna
author2 Serena Margadonna
format Journal article
container_title Mineralogical Magazine
container_volume 80
container_issue 4
container_start_page 659
publishDate 2016
institution Swansea University
doi_str_mv 10.1180/minmag.2016.080.017
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
url http://minmag.geoscienceworld.org/content/80/4/659.full.pdf+html
document_store_str 1
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description Ten years have passed since the description of the perovskite to post-perovskite transition in MgSiO3 and its’ impact on the mineralogy and rheology of the D’’ region at the base of the Earth’s mantle. Much work has explored the mechanisms operating during this transformation and their influence on seismic response. In parallel, calculations in ABX3 systems have identified potential structures for a denser post-post-perovskite phase occurring at higher pressures. However, experiments have yet to elucidate any higher pressure form, beyond the CaIrO3-type. Here we describe the structures and transformations that lead to the crystallisation of a post-post-perovskite of Sb2S3-type in a GdFeO3-type fluoroperovskite at high pressure conditions. The use of single-crystal techniques gives unique access to the relative crystallographic orientations of all polymorphs. We use this information to extend this description to include other calculated and observed forms that are competitive in ABX3 and A2X3 stoichiometries (e.g. Sb2S3, -Gd2S3, Be3N2,) and provide substantial information on inter-relationships between these structures. Such information is critical to the interpretation of transition mechanisms, predicting transition sequences and to the expression of directional properties in those transformed structures.
published_date 2016-06-01T12:56:52Z
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score 11.048149

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