Thermal behaviour of iron arsenides under non-oxidising conditions

Seitkan, Ainur and Lampronti, Giulio I. and Widmer, Remo N. and Casati, Nicola P. M. and Redfern, Simon A. T. (2020) Thermal behaviour of iron arsenides under non-oxidising conditions. ACS Omega, 5 (12). ISSN 2470-1343 DOI https://doi.org/10.1021/acsomega.9b03928

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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.

Item Type:	Article
Uncontrolled Keywords:	2020AREP; IA76
Subjects:	03 - Mineral Sciences
Divisions:	03 - Mineral Sciences 07 - Gold Open Access
Journal or Publication Title:	ACS Omega
Volume:	5
Identification Number:	https://doi.org/10.1021/acsomega.9b03928
Depositing User:	Sarah Humbert
Date Deposited:	07 May 2020 22:27
Last Modified:	07 May 2020 22:27
URI:	http://eprints.esc.cam.ac.uk/id/eprint/4733

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