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. 2019 Oct 12;12(20):3326. doi: 10.3390/ma12203326

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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XRD pattern of the particles produced by USP from the experiment Fe/Au 2, with identified maghemite Fe₂O₃, wustite Fe_0.942O, and Au crystal structures. Some unidentified peaks of an additional cubic phase (Fm-3m) are present in the spectrum.