Thermal Behavior of Iron Arsenides Under Non-Oxidizing Conditions.

Autor: Seitkan A; School of Natural Sciences, Astana International University, Nur-Sultan 010000, Kazakhstan., Lampronti GI; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, U.K., Widmer RN; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, U.K., Casati NPM; Swiss Light Source, Paul Scherrer Institute, 5232 Villigen, Switzerland., Redfern SAT; Asian School of the Environment, Nanyang Technological University, 639798, Singapore.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2020 Mar 20; Vol. 5 (12), pp. 6423-6428. Date of Electronic Publication: 2020 Mar 20 (Print Publication: 2020).
DOI: 10.1021/acsomega.9b03928
Abstrakt: 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.
Competing Interests: The authors declare no competing financial interest.
(Copyright © 2020 American Chemical Society.)
Databáze: MEDLINE
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