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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">Russian Journal of Inorganic Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Inorganic Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал неорганической химии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0044-457X</issn><issn publication-format="electronic">3034-560X</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">665293</article-id><article-id pub-id-type="doi">10.31857/S0044457X22700155</article-id><article-id pub-id-type="edn">JFDLIJ</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>НЕОРГАНИЧЕСКИЕ МАТЕРИАЛЫ И НАНОМАТЕРИАЛЫ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Unknown</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Synthesis of Hydroxylapatite Substituted with REE Ions (La3+ and Y3+): Composition, Structure, and Properties</article-title><trans-title-group xml:lang="ru"><trans-title>Синтез гидроксиапатита, замещенного ионами РЗЭ (La<sup>3+</sup>, Y<sup>3+</sup>), состав, структура и свойства</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Golovanova</surname><given-names>O. A.</given-names></name><name xml:lang="ru"><surname>Голованова</surname><given-names>О. А.</given-names></name></name-alternatives><email>golovanoa2000@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Omsk State University</institution></aff><aff><institution xml:lang="ru">Омский государственный университет им. Ф.М. Достоевского</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-03-01" publication-format="electronic"><day>01</day><month>03</month><year>2023</year></pub-date><volume>68</volume><issue>3</issue><fpage>393</fpage><lpage>400</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, О.А. Голованова</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, О.А. Голованова</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">О.А. Голованова</copyright-holder><copyright-holder xml:lang="ru">О.А. Голованова</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/0044-457X/article/view/665293">https://transsyst.ru/0044-457X/article/view/665293</self-uri><abstract xml:lang="en"><p>Substituted hydroxylapatites (HAs) containing various La3+ or Y3+ percentages were prepared. X‑ray powder diffraction, Four-transform IR spectroscopy, and optical spectroscopy verified the formation of substituted hydroxylapatites (La–HA and Y–HA). Inductively coupled plasma atomic emission spectrometry (ICP–AES) verified the presence of REE ions in the solids. Changes in the unit cell parameters of the prepared phases indicated that the REE ions substituted for Ca2+ ions in the hydroxylapatite structure. The lanthanum or yttrium percentage in precipitates increased in response to increasing REE salt concentration (within 1–5 wt %) in the initial solution as shown by chemical analysis; this brought about a decrease in the ratio Ca/P compared to the stoichiometric ratio (1.67). The solubility of the synthesized samples was studied, and it appeared that the cation-substituted hydroxylapatites were less soluble than undoped HA was.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181324511360">Выполнен синтез замещенного гидроксиапатита (ГА) с различным содержанием ионов La<sup>3+</sup> и Y<sup>3+</sup>. Методами РФА, ИК-Фурье- и оптической спектроскопии доказано образование замещенного гидроксиапатита (La–ГА, Y–ГА). При помощи атомно-эмиссионной спектрометрии с индуктивно-связанной плазмой доказано присутствие ионов РЗЭ в твердых фазах. Выявлено изменение параметров кристаллических решеток синтезированных фаз, что свидетельствует о замещении ионов Ca<sup>2+</sup> на ионы РЗЭ в структуре гидроксиапатита. Методом химического анализа установлено, что с увеличением концентрации солей лантана и иттрия (1–5 мас. %) в исходном растворе их содержание в осадках растет, это приводит к уменьшению отношения Ca/P по сравнению со стехиометрическим, равным 1.67. При изучении растворимости синтезированных образцов выявлено, что катионзамещенные гидроксиапатиты менее растворимы, чем нелегированный ГА.</p></trans-abstract><kwd-group xml:lang="en"><kwd>lanthanum and yttrium</kwd><kwd>ratio Ca/P</kwd><kwd>solubility</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>лантан и иттрий</kwd><kwd>отношение Ca/P</kwd><kwd>растворимость</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Kulwinder K., Singh K.J., Anand V. et al. // Ceram. Int. 2017. V. 43. 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