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An Alternative Route to Pentavalent Postperovskite

Wilson A. Crichton, Kirill V. Yusenko, Sephira Riva, Francesco Mazzali, Serena Margadonna Orcid Logo

Inorganic Chemistry, Volume: 55, Issue: 12, Pages: 5738 - 5740

Swansea University Author: Serena Margadonna Orcid Logo

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DOI (Published version): 10.1021/acs.inorgchem.6b00780

Abstract

A novel and advantageous synthetic route to post-perovskite (ppv) has produced the second-only known pentavalent CaIrO3-type structure in a compound where commonly used indicators, such as pseudocubic tilt or tolerance factor, suggest that ppv should not form. In addition to demonstrating that ppv-N...

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Published in: Inorganic Chemistry
ISSN: 1520-510X
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa28821
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spelling 2020-06-25T16:12:40.1080044 v2 28821 2016-06-10 An Alternative Route to Pentavalent Postperovskite e31904a10b1b1240b98ab52d9977dfbe 0000-0002-6996-6562 Serena Margadonna Serena Margadonna true false 2016-06-10 CHEG A novel and advantageous synthetic route to post-perovskite (ppv) has produced the second-only known pentavalent CaIrO3-type structure in a compound where commonly used indicators, such as pseudocubic tilt or tolerance factor, suggest that ppv should not form. In addition to demonstrating that ppv-NaOsO3 can be made from perovskite-type NaOsO3 at 16 GPa and 1135 K, ppv NaOsO3 has also been produced, and recovered, from a cubic KSbO3-containing assemblage, at 6 GPa and 1100 K, from an initial mixed-phase precursor of hexavalent Na2OsO4 and nominally pentavalent KSbO3-like phases. It The latter offers a new lower pressure route to the post-perovskite form – one which completely foregoes any perovskite precursor or intermediate. This work suggests that ppv can be obtained in other KSbO3-like compounds, which lend themselves to technological and synthetic application through their advantageous flexibility towards oxygen content, and cation valences and deficiencies, as well as in otherand chemistries where generalized rules based on the pv structure may not apply, or where no perovskite is known. One more obvious consequence of our second route is that perovskite formation may even mask and hinder other less extreme chemical pathways to post-perovskite phases. Journal Article Inorganic Chemistry 55 12 5738 5740 1520-510X post-perovskite, perovskite, high-pressure and high temperature synthesis, diffraction 31 12 2016 2016-12-31 10.1021/acs.inorgchem.6b00780 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2020-06-25T16:12:40.1080044 2016-06-10T11:40:59.4284666 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Wilson A. Crichton 1 Kirill V. Yusenko 2 Sephira Riva 3 Francesco Mazzali 4 Serena Margadonna 0000-0002-6996-6562 5 0028821-26032018095709.pdf 28821.pdf 2018-03-26T09:57:09.1830000 Output 587791 application/pdf Accepted Manuscript true 2016-06-10T00:00:00.0000000 true eng
title An Alternative Route to Pentavalent Postperovskite
spellingShingle An Alternative Route to Pentavalent Postperovskite
Serena Margadonna
title_short An Alternative Route to Pentavalent Postperovskite
title_full An Alternative Route to Pentavalent Postperovskite
title_fullStr An Alternative Route to Pentavalent Postperovskite
title_full_unstemmed An Alternative Route to Pentavalent Postperovskite
title_sort An Alternative Route to Pentavalent Postperovskite
author_id_str_mv e31904a10b1b1240b98ab52d9977dfbe
author_id_fullname_str_mv e31904a10b1b1240b98ab52d9977dfbe_***_Serena Margadonna
author Serena Margadonna
author2 Wilson A. Crichton
Kirill V. Yusenko
Sephira Riva
Francesco Mazzali
Serena Margadonna
format Journal article
container_title Inorganic Chemistry
container_volume 55
container_issue 12
container_start_page 5738
publishDate 2016
institution Swansea University
issn 1520-510X
doi_str_mv 10.1021/acs.inorgchem.6b00780
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
document_store_str 1
active_str 0
description A novel and advantageous synthetic route to post-perovskite (ppv) has produced the second-only known pentavalent CaIrO3-type structure in a compound where commonly used indicators, such as pseudocubic tilt or tolerance factor, suggest that ppv should not form. In addition to demonstrating that ppv-NaOsO3 can be made from perovskite-type NaOsO3 at 16 GPa and 1135 K, ppv NaOsO3 has also been produced, and recovered, from a cubic KSbO3-containing assemblage, at 6 GPa and 1100 K, from an initial mixed-phase precursor of hexavalent Na2OsO4 and nominally pentavalent KSbO3-like phases. It The latter offers a new lower pressure route to the post-perovskite form – one which completely foregoes any perovskite precursor or intermediate. This work suggests that ppv can be obtained in other KSbO3-like compounds, which lend themselves to technological and synthetic application through their advantageous flexibility towards oxygen content, and cation valences and deficiencies, as well as in otherand chemistries where generalized rules based on the pv structure may not apply, or where no perovskite is known. One more obvious consequence of our second route is that perovskite formation may even mask and hinder other less extreme chemical pathways to post-perovskite phases.
published_date 2016-12-31T03:35:11Z
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score 10.997956

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