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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 pub-id-type="doi">10.17586/2220-8054-2023-14-5-549-553</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-292</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>Nanoparticles in titanite ore</article-title><trans-title-group xml:lang="ru"><trans-title>Наночастицы в CaTiSiO5 руде</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9229-6758</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дорошева</surname><given-names>И. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Dorosheva</surname><given-names>I. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ирина Борисовна Дорошева</p></bio><bio xml:lang="en"><p>Irina B. Dorosheva</p><p>620016 Yekaterinburg</p></bio><email xlink:type="simple">dorosheva1993@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0543-9982</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ремпель</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Rempel</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Андрей Андреевич Ремпель</p></bio><bio xml:lang="en"><p>Andrey A. Rempel</p><p>620016 Yekaterinburg</p></bio><email xlink:type="simple">rempel.imet@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4857-0884</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калашникова</surname><given-names>Г. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalashnikova</surname><given-names>G. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Галина Олеговна Калашникова</p></bio><bio xml:lang="en"><p>Galina O. Kalashnikova</p><p>Fersmana str., 14, 184209 Apatity</p></bio><email xlink:type="simple">g.kalashnikova@ksc.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Яковенчук</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Yakovenchuk</surname><given-names>V. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виктор Нестерович Яковенчук</p></bio><bio xml:lang="en"><p>Victor N. Yakovenchuk</p><p>Fersmana str., 14, 184209 Apatity</p></bio><email xlink:type="simple">yakovenchuk@geoksc.apatity.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-2"><institution>Nanomaterials Research Centre, Kola Science Centre, Russian Academy of Sciences</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>08</day><month>06</month><year>2025</year></pub-date><volume>14</volume><issue>5</issue><fpage>549</fpage><lpage>553</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Dorosheva I.B., Rempel A.A., Kalashnikova G.O., Yakovenchuk V.N., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Дорошева И.Б., Ремпель А.А., Калашникова Г.О., Яковенчук В.Н.</copyright-holder><copyright-holder xml:lang="en">Dorosheva I.B., Rempel A.A., Kalashnikova G.O., Yakovenchuk V.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/292">https://nanojournal.ifmo.ru/jour/article/view/292</self-uri><abstract><p>Nanoparticles in titanite CaTiSiO5 were found using transmission electron microscopy. Chemical and XPS analyzes of the nanoparticles were performed. The study showed the content of the elements Si, Ti and Ca to be about 19, 14 and 12 % in the ore, respectively, belonging to the titanite phase. Based on TEM images, it was established that titanite exhibits a disordered lamellar structure with a diameter of 3 to 5 nm and an interplanar distance of about 6.3 A° .</p></abstract><trans-abstract xml:lang="ru"><p>Наночастицы в титаните CaTiSiO5 были обнаружены с помощью просвечивающей электронной микроскопии. Был проведен химический анализ и съемка рентгеновской фотоэлектронной спектроскопии. Исследование показало, что содержание элементов Si, Ti и Ca в руде, относящейся к титанитовой фазе, составляет около 19, 14 и 12 % соответственно. На основании ПЭМ-изображений установлено, что титанит имеет неупорядоченную пластинчатую структуру с диаметром частиц от 3 до 5 нм и межплоскостным расстоянием около 6,3 А.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Титанит</kwd><kwd>наночастицы</kwd><kwd>просвечивающая электронная микроскопия (ПЭМ)</kwd><kwd>рентгеновская фотоэлектронная спектроскопия (РФЭС)</kwd></kwd-group><kwd-group xml:lang="en"><kwd>titanite</kwd><kwd>nanoparticles</kwd><kwd>transmission electron microscopy (TEM)</kwd><kwd>X-ray photoelectron spectroscopy (XPS)</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by the Russian Science Foundation [grant number 21–73- 20039].</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">Gerasimova L.G., Maslova M.V. Titanium Hydroxides and Compositions on Their Basis. Production and Application. 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