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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">najo-1163</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CHEMISTRY AND MATERIAL SCIENCE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ХИМИЯ И МАТЕРИАЛОВЕДЕНИЕ</subject></subj-group></article-categories><title-group><article-title>Formation mechanism of YFeO3 nanoparticles under the hydrothermal conditions</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Popkov</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="en"><p>St. Petersburg</p></bio><email xlink:type="simple">vadim.i.popkov@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Almjasheva</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>St. Petersburg</p></bio><email xlink:type="simple">almjasheva@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="en">Saint Petersburg State Technological Institute (Technical University); Ioffe Physical Technical Institute<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="en">Saint Petersburg Electrotechnical University ‘LETI’,  Ioffe Physical Technical Institute<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>18</day><month>08</month><year>2025</year></pub-date><volume>5</volume><issue>5</issue><fpage>703</fpage><lpage>708</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Popkov V.I., Almjasheva O.V., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Popkov V.I., Almjasheva O.V.</copyright-holder><copyright-holder xml:lang="en">Popkov V.I., Almjasheva O.V.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://nanojournal.ifmo.ru/jour/article/view/1163">https://nanojournal.ifmo.ru/jour/article/view/1163</self-uri><abstract><p>Yttrium orthoferrite nanocrystals with an average crystallite size of 55 – 60 nm have been obtained under hydrothermal conditions. The influence of the hydrothermal synthesis temperature on the structure and crystallite size has been investigated. Mechanism of the YFeO3 formation under the hydrothermal conditions has been proposed.</p></abstract><kwd-group xml:lang="en"><kwd>yttrium orthoferrite</kwd><kwd>YFeO3</kwd><kwd>hydrothermal synthesis</kwd><kwd>phase formation</kwd><kwd>formation mechanism</kwd></kwd-group><funding-group xml:lang="en"><funding-statement>The authors would like to thank Prof. V. V. Gusarov for interest in the work and help in the interpretation of results. The authors wish to thank V. S. Fundamensky for help in complex X-ray analysis and interpretation of its results. This work was financially supported by the Russian Foundation for Basic Research (project 13-03-12470).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Livage J. Vanadium pentoxide gels. 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