Thermal Behavior of Iron Arsenides Under Non-Oxidizing Conditions

[Image: see text] Fe(2)As has been studied in situ by synchrotron powder X-ray diffraction (PXRD) over the range of temperatures 25–850 °C and under a neutral atmosphere to understand its thermal behavior, which is potentially important for gold extraction. For the first time, incongruent high-tempe...

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Autores principales: Seitkan, Ainur, Lampronti, Giulio I., Widmer, Remo N., Casati, Nicola P. M., Redfern, Simon A. T.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7114163/
https://www.ncbi.nlm.nih.gov/pubmed/32258877
http://dx.doi.org/10.1021/acsomega.9b03928
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author Seitkan, Ainur
Lampronti, Giulio I.
Widmer, Remo N.
Casati, Nicola P. M.
Redfern, Simon A. T.
author_facet Seitkan, Ainur
Lampronti, Giulio I.
Widmer, Remo N.
Casati, Nicola P. M.
Redfern, Simon A. T.
author_sort Seitkan, Ainur
collection PubMed
description [Image: see text] Fe(2)As has been studied in situ by synchrotron powder X-ray diffraction (PXRD) over the range of temperatures 25–850 °C and under a neutral atmosphere to understand its thermal behavior, which is potentially important for gold extraction. For the first time, incongruent high-temperature reactions of Fe(2)As are observed as it breaks down and the existence of a previously undiscovered high-temperature FeAs phase with an NiAs-type structure has been determined experimentally. No evidence has been found for the existence of the high-temperature Fe(3)As(2) phase. Hence, the previously published phase diagram for the Fe–As system has to be modified accordingly.
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spelling pubmed-71141632020-04-03 Thermal Behavior of Iron Arsenides Under Non-Oxidizing Conditions Seitkan, Ainur Lampronti, Giulio I. Widmer, Remo N. Casati, Nicola P. M. Redfern, Simon A. T. ACS Omega [Image: see text] Fe(2)As has been studied in situ by synchrotron powder X-ray diffraction (PXRD) over the range of temperatures 25–850 °C and under a neutral atmosphere to understand its thermal behavior, which is potentially important for gold extraction. For the first time, incongruent high-temperature reactions of Fe(2)As are observed as it breaks down and the existence of a previously undiscovered high-temperature FeAs phase with an NiAs-type structure has been determined experimentally. No evidence has been found for the existence of the high-temperature Fe(3)As(2) phase. Hence, the previously published phase diagram for the Fe–As system has to be modified accordingly. American Chemical Society 2020-03-20 /pmc/articles/PMC7114163/ /pubmed/32258877 http://dx.doi.org/10.1021/acsomega.9b03928 Text en Copyright © 2020 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Seitkan, Ainur
Lampronti, Giulio I.
Widmer, Remo N.
Casati, Nicola P. M.
Redfern, Simon A. T.
Thermal Behavior of Iron Arsenides Under Non-Oxidizing Conditions
title Thermal Behavior of Iron Arsenides Under Non-Oxidizing Conditions
title_full Thermal Behavior of Iron Arsenides Under Non-Oxidizing Conditions
title_fullStr Thermal Behavior of Iron Arsenides Under Non-Oxidizing Conditions
title_full_unstemmed Thermal Behavior of Iron Arsenides Under Non-Oxidizing Conditions
title_short Thermal Behavior of Iron Arsenides Under Non-Oxidizing Conditions
title_sort thermal behavior of iron arsenides under non-oxidizing conditions
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7114163/
https://www.ncbi.nlm.nih.gov/pubmed/32258877
http://dx.doi.org/10.1021/acsomega.9b03928
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