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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-1119</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 MATERIALS SCIENCE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ХИМИЯ И НАУКА О МАТЕРИАЛАХ</subject></subj-group></article-categories><title-group><article-title>Nanocrystalline perovskite-like oxides formation in Ln2O3 – Fe2O3 – H2O (Ln = La, Gd) systems</article-title><trans-title-group xml:lang="ru"><trans-title>Nanocrystalline perovskite-like oxides formation in Ln2O3 – Fe2O3 – H2O (Ln = La, Gd) systems</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Tugova</surname><given-names>E. A.</given-names></name><name name-style="western" xml:lang="en"><surname>Tugova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Saint Petersburg</p></bio><bio xml:lang="en"><p>Saint Petersburg</p></bio><email xlink:type="simple">katugova@inbox.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Karpov</surname><given-names>O. N.</given-names></name><name name-style="western" xml:lang="en"><surname>Karpov</surname><given-names>O. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Saint Petersburg</p></bio><bio xml:lang="en"><p>Saint Petersburg</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Ioffe Physical Technical Institute of RAS</institution></aff><aff xml:lang="en"><institution>Ioffe Physical Technical Institute of RAS</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>17</day><month>08</month><year>2025</year></pub-date><volume>5</volume><issue>6</issue><fpage>854</fpage><lpage>860</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Tugova E.A., Karpov O.N., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Tugova E.A., Karpov O.N.</copyright-holder><copyright-holder xml:lang="en">Tugova E.A., Karpov O.N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" 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/1119">https://nanojournal.ifmo.ru/jour/article/view/1119</self-uri><abstract><p>   Nanocrystalline LnFeO3 (Ln = La, Gd) ferrites have been prepared by the co-precipitation method followed by heat treatment in air. The formation mechanisms for LaFeO3 and GdFeO3 in Ln2O3 – Fe2O3 – H2O (Ln = La, Gd) systems under the mentioned conditions are investigated. The phase interaction scheme, reflecting ways which lead to the target, synthesis product yield, as well as the common tendency of LaFeO3 and GdFeO3 formation mechanisms, are constructed. The mean sizes of coherent scattering regions of LaFeO3 and GdFeO3 were determined to be 30 ± 3 and 40 ± 4 nm, respectively.</p></abstract><trans-abstract xml:lang="ru"><p>   Nanocrystalline LnFeO3 (Ln = La, Gd) ferrites have been prepared by the co-precipitation method followed by heat treatment in air. The formation mechanisms for LaFeO3 and GdFeO3 in Ln2O3 – Fe2O3 – H2O (Ln = La, Gd) systems under the mentioned conditions are investigated. The phase interaction scheme, reflecting ways which lead to the target, synthesis product yield, as well as the common tendency of LaFeO3 and GdFeO3 formation mechanisms, are constructed. The mean sizes of coherent scattering regions of LaFeO3 and GdFeO3 were determined to be 30 ± 3 and 40 ± 4 nm, respectively.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>LnFeO3</kwd><kwd>ferrites</kwd><kwd>nanostructures</kwd><kwd>precipitation technique</kwd><kwd>phase formation</kwd><kwd>X-Ray diffraction</kwd></kwd-group><kwd-group xml:lang="en"><kwd>LnFeO3</kwd><kwd>ferrites</kwd><kwd>nanostructures</kwd><kwd>precipitation technique</kwd><kwd>phase formation</kwd><kwd>X-Ray diffraction</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Tugova E.A., Zvereva I.A. Formation mechanism of GdFeO&lt;sub&gt;3&lt;/sub&gt; nanoparticles under the hydrothermal conditions. Nanosystems: physics, chemistry, mathematics, 4(6), P. 851–856 (2013).</mixed-citation><mixed-citation xml:lang="en">Tugova E.A., Zvereva I.A. 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