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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Doklady Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Doklady Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Российской академии наук. Химия, науки о материалах</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2686-9535</issn><issn publication-format="electronic">3034-5111</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">651944</article-id><article-id pub-id-type="doi">10.31857/S2686953523700279</article-id><article-id pub-id-type="edn">BUUIEO</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>PHYSICAL CHEMISTRY</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ФИЗИЧЕСКАЯ ХИМИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">PHASE EQUILIBRIA IN THE Li–Mn–Eu–O SYSTEM</article-title><trans-title-group xml:lang="ru"><trans-title>Фазовые равновесия в системе Li–Mn–Eu–O</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Buzanov</surname><given-names>G. A.</given-names></name><name xml:lang="ru"><surname>Бузанов</surname><given-names>Г. А.</given-names></name></name-alternatives><email>gbuzanov@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nipan</surname><given-names>G. D.</given-names></name><name xml:lang="ru"><surname>Нипан</surname><given-names>Г. Д.</given-names></name></name-alternatives><email>gbuzanov@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт общей и неорганической химии
им. Н.С. Курнакова Российской академии наук</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-11-01" publication-format="electronic"><day>01</day><month>11</month><year>2023</year></pub-date><volume>513</volume><issue>1</issue><fpage>139</fpage><lpage>144</lpage><history><date date-type="received" iso-8601-date="2025-02-02"><day>02</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Г.А. Бузанов, Г.Д. Нипан</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Г.А. Бузанов, Г.Д. Нипан</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Г.А. Бузанов, Г.Д. Нипан</copyright-holder><copyright-holder xml:lang="ru">Г.А. Бузанов, Г.Д. Нипан</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/2686-9535/article/view/651944">https://journals.eco-vector.com/2686-9535/article/view/651944</self-uri><abstract xml:lang="en"><p id="idm45257550433168">Phase equilibria in the Li–Mn–Eu–O system were studied for the first time in the temperature range 700–1000°С, and a concentration diagram was plotted within the Li–Mn–Eu triangle at an oxygen partial pressure of 21 kPa. It is shown that the LiEuO<sub>2</sub>–Li<sub>2</sub>MnO<sub>3</sub> system is quasi-binary, unlike the sections LiEuO<sub>2</sub>–LiMnO<sub>2</sub> and LiEuO<sub>2</sub>–LiMn<sub>2</sub>O<sub>4</sub>. It has been established that, for spinel LiMn<sub>2</sub>O<sub>4</sub> (<italic>Fd\(\bar {3}\)m</italic>), a homogeneous introduction of 2 mol % Eu is possible, while in the case of Li<sub>2</sub>MnO<sub>3</sub> (<italic>C</italic>2/<italic>m</italic>), the single-phase state decays.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45257550432672">Впервые исследованы фазовые равновесия в системе Li–Mn–Eu–O в интервале температур 700–1000°С, и в рамках треугольника Li–Mn–Eu построена концентрационная диаграмма при парциальном давлении кислорода 21 кПа. Разрез LiEuO<sub>2</sub>–Li<sub>2</sub>MnO<sub>3</sub> можно представить как квазибинарный, в отличие от разрезов LiEuO<sub>2</sub>–LiMnO<sub>2</sub> и LiEuO<sub>2</sub>–LiMn<sub>2</sub>O<sub>4</sub>. Установлено, что для шпинели LiMn<sub>2</sub>O<sub>4</sub> (<italic>Fd\(\bar {3}\)m</italic>) изоморфное замещение Eu не превышает 2 мол. %, а в случае Li<sub>2</sub>MnO<sub>3</sub> (<italic>C</italic>2/<italic>m</italic>) происходит разрушение однофазности.</p></trans-abstract><kwd-group xml:lang="en"><kwd>phase equilibria</kwd><kwd>lithium-ion batteries</kwd><kwd>manganites</kwd><kwd>oxide spinels</kwd><kwd>solid-phase synthesis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>фазовые равновесия</kwd><kwd>литий-ионные аккумуляторы</kwd><kwd>манганиты</kwd><kwd>оксидные шпинели</kwd><kwd>твердофазный синтез</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Элементный анализ методом ИСП-МС проводился с использованием научного оборудования Центра коллективного пользования “Исследовательский химико-аналитический центр НИЦ “Курчатовский институт”. Рентгенофазовый анализ выполнен в Центре коллективного пользования физическими методами исследования веществ и материалов Института общей и неорганической химии им. Н.С. Курнакова Российской академии наук.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Mosa J., Aparacio M. Handbook of sol-gel science and technology. Cham. Springer. 2017. 36 p. https://doi.org/10.1007/978-3-319-19454-7_108-1</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Buzanov G.A., Nipan G.D., Zhizhin K.Y., Kuzne-tsov N.T. // Russ. J. Inorg. Chem. 2017. V. 62. № 5. P. 551–557. https://doi.org/10.1134/s0036023617050059</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Su Z., Xu M.-W., Ye S.-H., Wang Y.-L. // Acta Phys.-Chim. Sin. 2009. V. 25. № 6. 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