Thermal Behavior of Iron Arsenides under Non-Oxidizing Conditions

Ainur Seitkan; Giulio I. Lampronti; Remo N. Widmer; Nicola P.M. Casati; Simon A.T. Redfern

doi:10.1021/acsomega.9b03928

Thermal Behavior of Iron Arsenides under Non-Oxidizing Conditions

Ainur Seitkan^*, Giulio I. Lampronti^*, Remo N. Widmer, Nicola P.M. Casati, Simon A.T. Redfern^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Fe2As 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 Fe2As 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 Fe3As2 phase. Hence, the previously published phase diagram for the Fe-As system has to be modified accordingly.

Original language	English
Pages (from-to)	6423-6428
Number of pages	6
Journal	ACS Omega
Volume	5
Issue number	12
DOIs	https://doi.org/10.1021/acsomega.9b03928
Publication status	Published - Mar 31 2020
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2020 American Chemical Society.

ASJC Scopus Subject Areas

General Chemistry
General Chemical Engineering

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title = "Thermal Behavior of Iron Arsenides under Non-Oxidizing Conditions",

abstract = "Fe2As 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 Fe2As 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 Fe3As2 phase. Hence, the previously published phase diagram for the Fe-As system has to be modified accordingly.",

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T1 - Thermal Behavior of Iron Arsenides under Non-Oxidizing Conditions

AU - Seitkan, Ainur

AU - Lampronti, Giulio I.

AU - Widmer, Remo N.

AU - Casati, Nicola P.M.

AU - Redfern, Simon A.T.

PY - 2020/3/31

Y1 - 2020/3/31

N2 - Fe2As 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 Fe2As 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 Fe3As2 phase. Hence, the previously published phase diagram for the Fe-As system has to be modified accordingly.

AB - Fe2As 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 Fe2As 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 Fe3As2 phase. Hence, the previously published phase diagram for the Fe-As system has to be modified accordingly.

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Thermal Behavior of Iron Arsenides under Non-Oxidizing Conditions

Abstract

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ASJC Scopus Subject Areas

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