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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="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of General Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of General Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал общей химии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0044-460X</issn><issn publication-format="electronic">3034-5596</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">667113</article-id><article-id pub-id-type="doi">10.31857/S0044460X23020178</article-id><article-id pub-id-type="edn">QCSJDA</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Effect of Co-Doping on the Electrical Properties of Magnesium and Copper-Containing Bismuth Niobate with Pyrochlor-Type Structure</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние содопирования на электрические свойства магний и медьсодержащего ниобата висмута со структурой типа пирохлора</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Piir</surname><given-names>I. V</given-names></name><name xml:lang="ru"><surname>Пийр</surname><given-names>И. В</given-names></name></name-alternatives><email>ipiir@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Koroleva</surname><given-names>M. S</given-names></name><name xml:lang="ru"><surname>Королева</surname><given-names>М. С</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Maksimov</surname><given-names>V. S</given-names></name><name xml:lang="ru"><surname>Максимов</surname><given-names>В. С</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Chemistry, Federal Research Center “Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences”</institution></aff><aff><institution xml:lang="ru">Институт химии Федерального исследовательского центра «Коми научный центр Уральского отделения Российской академии наук»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Pitirim Sorokin Syktyvkar State University</institution></aff><aff><institution xml:lang="ru">Сыктывкарский государственный университет имени Питирима Сорокина</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2023</year></pub-date><volume>93</volume><issue>2</issue><issue-title xml:lang="en">NO2 (2023)</issue-title><issue-title xml:lang="ru">№2 (2023)</issue-title><fpage>308</fpage><lpage>313</lpage><history><date date-type="received" iso-8601-date="2025-02-26"><day>26</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Российская академия наук</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/0044-460X/article/view/667113">https://transsyst.ru/0044-460X/article/view/667113</self-uri><abstract xml:lang="en"><p>Ruthenium-codoped bismuth niobate Bi<sub>1.5</sub>Cu<sub>0.375</sub>Mg<sub>0.375</sub>Nb<sub>1.45</sub>Ru<sub>0.05</sub>O<sub>7-δ </sub>with the pyrochlore structure was obtained by Pechini method. The distribution of Ru<sup>4+ </sup>over Nb<sup>5+ </sup>sites was established by structural analysis. According to the data of optical reflectance spectra, the optical band gap decreases from 2.40 to 2.27 eV for the sample doped with ruthenium. A small amount of ruthenium in the system was found to result in an increase in conductivity by 0.5 orders of magnitude compared to Cu-Mg-substituted bismuth niobate, due to an increase in the electronic component of the conductivity.</p></abstract><trans-abstract xml:lang="ru"><p>В работе методом Печини получен содопированный рутением ниобат висмута Bi<sub>1.5</sub>Cu<sub>0.375</sub>Mg<sub>0.375</sub>Nb<sub>1.45</sub>Ru<sub>0.05</sub>O<sub>7-δ </sub>со структурой пирохлора. Методом структурного анализа установлено распределение Ru<sup>4+ </sup>в позициях Nb<sup>5+</sup>. По данным оптических спектров отражения выявлено уменьшение ширины запрещенной зоны от 2.40 до 2.27 эВ в допированном рутением образце. Показано, что даже незначительное количество рутения приводит к увеличению проводимости на 0.5 порядка относительно недопированного рутением Cu-Mg-замещенного ниобата висмута, обусловленной увеличением электронной составляющей проводимости.</p></trans-abstract><kwd-group xml:lang="en"><kwd>substituted bismuth niobate</kwd><kwd>co-doping</kwd><kwd>pyrochlore</kwd><kwd>conductivity</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>замещенный ниобат висмута</kwd><kwd>содопирование</kwd><kwd>пирохлор</kwd><kwd>проводимость</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Subramanian M.A., Aravamudan G., Subba Rao G.V. // Prog. Solid State Chem. 1983. Vol. 15. P. 55. doi 10.1016/0079-6786(83)90001-8</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Williford R.E., Weber W.J., Devanathan R., Gale J.D. // J. Electroceramics. 1999.Vol. 3. 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