<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">litosphere</journal-id><journal-title-group><journal-title xml:lang="ru">Литосфера</journal-title><trans-title-group xml:lang="en"><trans-title>LITHOSPHERE (Russia)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1681-9004</issn><issn pub-type="epub">2500-302X</issn><publisher><publisher-name>A.N. Zavaritsky Institute of Geology and Geochemistry</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24930/1681-9004-2025-25-2-336-343</article-id><article-id custom-type="edn" pub-id-type="custom">ZBMZGX</article-id><article-id custom-type="elpub" pub-id-type="custom">litosphere-2280</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="ru"><subject>СИНТЕЗ И СВОЙСТВА МИНЕРАЛОПОДОБНЫХ МАТЕРИАЛОВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SYNTHESIS AND PROPERTIES OF MINERAL-LIKE MATERIALS</subject></subj-group></article-categories><title-group><article-title>Формирование минералоподобных фаз в системе Sr9In(PO4)7–Ca9Ln(PO4)7</article-title><trans-title-group xml:lang="en"><trans-title>Formation of mineral-like phases in the system Sr9In(PO4)7–Ca9Ln(PO4)7</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>Никифоров</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikiforov</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>химический факультет</p><p>119991; Ленинские горы, 1; Москва</p></bio><bio xml:lang="en"><p>Ivan V. Nikiforov</p><p>Department of Chemistry</p><p>119991; 1 Lenin Hills; Moscow</p></bio><email xlink:type="simple">nikiforoviv@my.msu.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>Жуковская</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhukovskaya</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>химический факультет</p><p>119991; Ленинские горы, 1; Москва</p></bio><bio xml:lang="en"><p>Evgenia S. Zhukovskaya</p><p>Department of Chemistry</p><p>119991; 1 Lenin Hills; Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гостева</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Gosteva</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>184209;  ул. Ферсмана, 26а; Апатиты</p></bio><bio xml:lang="en"><p>Alevtina N. Gosteva</p><p>184209; 26A Fersman st.; Apatity</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Аксенов</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Aksenov</surname><given-names>S. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>184209; ул. Ферсмана, 26а; Академгородок, 10а; Апатиты</p></bio><bio xml:lang="en"><p>Sergey M. Aksenov</p><p>184209; 26A Fersman st.; 10A Akademgorodok; Apatity</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дейнеко</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Deyneko</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>химический факультет</p><p>119991; Ленинские горы, 1; Москва; 184209; Академгородок, 10а; Апатиты</p></bio><bio xml:lang="en"><p>Dina V. Deyneko</p><p>Department of Chemistry</p><p>119991; 1 Lenin Hills; Moscow; 184209; 10A Akademgorodok; Apatity</p></bio><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский государственный университет им. М.В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>M.V. Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт химии и технологии редких элементов и минерального сырья им. И.В. Тананаева КНЦ РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>I.V. Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre, KSC RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Геологический институт КНЦ РАН; Лаборатория арктической минералогии и материалов КНЦ РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Geological Institute, KSC RAS; Laboratory of Arctic Mineralogy and Material Sciences, KSC RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Московский государственный университет им. М.В. Ломоносова; Лаборатория арктической минералогии и материалов КНЦ РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>M.V. Lomonosov Moscow State University; Laboratory of Arctic Mineralogy and Material Sciences, KSC RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>04</day><month>05</month><year>2025</year></pub-date><volume>25</volume><issue>2</issue><issue-title>Минералы: строение, свойства, методы исследования</issue-title><fpage>336</fpage><lpage>343</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Никифоров И.В., Жуковская Е.С., Гостева А.Н., Аксенов С.М., Дейнеко Д.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Никифоров И.В., Жуковская Е.С., Гостева А.Н., Аксенов С.М., Дейнеко Д.В.</copyright-holder><copyright-holder xml:lang="en">Nikiforov I.V., Zhukovskaya E.S., Gosteva A.N., Aksenov S.M., Deyneko D.V.</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://www.lithosphere.ru/jour/article/view/2280">https://www.lithosphere.ru/jour/article/view/2280</self-uri><abstract><sec><title>   Объект исследования</title><p>   Объект исследования. Серия минералоподобных фаз со структурой стронциовитлокита (1–x)Sr9In(PO4)7–xCa9Ln(PO4)7 Ln = Eu3+, Yb3+.</p></sec><sec><title>   Цель</title><p>   Цель. Проанализировать фазообразование и дать кристаллохимические аспекты формирования минералоподобных фаз в системе.</p></sec><sec><title>   Методы</title><p>   Методы. Для достижения цели применялся следующий комплекс методов: рентгеновская дифракция, генерация второй оптической гармоники (ГВГ), диэлектрическая спектроскопия, фотолюминесцентная спектроскопия.</p></sec><sec><title>   Результаты</title><p>   Результаты. Высокотемпературным твердофазным методом были получены сложные фосфаты со структурой стронциовитлокита, что подтверждено рентгеновской дифракцией. Дифрактограммы синтезированных фаз соотносятся с ранее изученным Sr9In(PO4)7. Для всех образцов сигнал ГВГ не обнаружен в пределах чувствительности лазерной установки, что указывает на наличие центра симметрии в исследуемых системах. На температурной зависимости диэлектрической проницаемости регистрируются аномалии для всех исследуемых составов, в отличии от тангенса угла диэлектрических потерь, где никаких аномалий не было зарегистрировано. Схожее поведение в диэлектрических величинах может указывать на изоструктурность рассматриваемых соединений, а также на кристаллизацию в неполярной пространственной группе. Показано, что образцы обладают стабильной фотолюминесценцией в красно-оранжевой области за счет излучения катионов Eu3+, в то время как образы, содержащие Yb3+ обладают фотолюминесценцией в ИК области.</p></sec><sec><title>   Выводы</title><p>   Выводы. В серии (1–x)Sr9In(PO4)7–xCa9Ln(PO4)7 вещества будут кристаллизоваться в структуре Sr9In(PO4)7, где позиции Sr2+ с КЧ = 8 будут замещаться катионами Ca2+ и Eu3+, которые не будут замещать In3+ в маленькой октаэдрической позиции в виду слишком большого значения Dr, в отличии от более маленького катиона Yb3+. Изучены диэлектрические и фотолюминесцентные свойства (1–x)Sr9In(PO4)7–xCa9Ln(PO4)7.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>   Research subject</title><p>   Research subject. A series of mineral-like phases with strontiowhitlockite structure (1–x)Sr9In(PO4)7–xCa9Ln(PO4)7 Ln = Eu3+, Yb3+.</p></sec><sec><title>   Aim</title><p>   Aim: An analysis of phase formation patterns and crystal-chemical characteristics influencing the crystallization of mineral-like phases within the studied series.</p><p>   To achieve the aim, the following set of Materials and Methods is used: the powder X-ray diffraction (PXRD), the second harmonic generation (SHG), dielectric spectroscopy, the photoluminescence spectroscopy.</p></sec><sec><title>    Results</title><p>    Results. Doped phosphates with strontiowhitlockite structure were synthesized by a high temperature solid-state method. The structure was confirmed through X-ray diffraction method. The PXRD patterns of all samples were compared with strontiowhitlockite-type phosphate Sr9In(PO4)7. There was an absence of SHG signals, conforming the non-polar structure. The λ-maximum is observed in the temperature dependence of the dielectric constant for all sensitized samples, while no anomalies were recorded on the loss tangent. The similar behaviour in dielectric curves may indicate isostructurality of studied samples, and crystallisation in non-polar space group. It was shown that samples demonstrate stable photoluminescence in red-orange region for Eu3+-doped phosphates, while Yb3+-doped ones shown IR-photoluminescence properties.</p></sec><sec><title>   Conclusions</title><p>   Conclusions. A series (1–x)Sr9In(PO4)7–xCa9Ln(PO4)7 was crystallised in Sr9In(PO4)7 structure, where Sr2+ sites, with coordination number equals to 8, were substituted by Ca2+ and Eu3+. Such ions cannot occupy In3+ site, which is presented by small octahedral, due to high ionic radius difference between ions. However smallest ion as Yb3+ can occupy small octahedral site. Dielectric and photoluminescence properties were studied in (1–x)Sr9In(PO4)7–xCa9Ln(PO4)7.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>стронциовитлокит</kwd><kwd>β-Сa3(PO4)2</kwd><kwd>Yb3+</kwd><kwd>Eu3+</kwd><kwd>минералоподобные вещества</kwd><kwd>витлокит</kwd></kwd-group><kwd-group xml:lang="en"><kwd>strontiowhitlockite</kwd><kwd>β-Сa3(PO4)2</kwd><kwd>Yb3+</kwd><kwd>Eu3+</kwd><kwd>mineral-like compounds</kwd><kwd>whitlockite</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания по теме “Вещества и материалы для обеспечения безопасности, надежности и энергоэффективности” (АААА-А21-121011590086-0)</funding-statement><funding-statement xml:lang="en">This research was funded by the state task of the Russian Federation “Substances and materials for safety, reliability and energy efficiency”, state registration number АААА-А21-121011590086-0</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">Никифоров И.В., Титков В.В., Аксенов С.М., Лазоряк Б.И., Барышникова О.В., Дейнеко Д.В. (2024) Структурные особенности люминофоров на основе стронциовитлокита. ЖСХ, 65(8), 131548-131548. doi: 10.26902/jsc_id131548</mixed-citation><mixed-citation xml:lang="en">Nikiforov I.V., Titkov V.V., Aksenov S.М., Lazoryak B.I., Baryshnikova О.V., Deyneko D.V. (2024) Structural features of phosphors based on strontiowhitlockite. J. Structural Chem., 65(8), 131548-131548. doi: 10.26902/jsc_id131548</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Asmaa E.K., Mohammed E., Giancarlo D.V., Armida S., Rosanna R., Manuela R., Francesco C. (2017) Synthesis, structure refinement and vibrational spectroscopy of new rare-earth tricalcium phosphates Ca9RE(PO4)7 (RE = La, Pr, Nd, Eu, Gd, Dy, Tm, Yb). Ceram. Int., 4715645-15653.</mixed-citation><mixed-citation xml:lang="en">Asmaa E.K., Mohammed E., Giancarlo D.V., Armida S., Rosanna R., Manuela R., Francesco C. (2017) Synthesis, structure refinement and vibrational spectroscopy of new rare-earth tricalcium phosphates Ca9RE(PO4)7 (RE = La, Pr, Nd, Eu, Gd, Dy, Tm, Yb). Ceram. Int., 4715645-15653.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Belik A.A., Izumi F., Ikeda T., Okui M., Malakho A.P., Morozov V.A., Lazoryak B.I. (2002) Whitlockite-Related Phosphates Sr&lt;sub&gt;9&lt;/sub&gt;A(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt; (A=Sc, Cr, Fe, Ga, and In): Structure Refinement of Sr&lt;sub&gt;9&lt;/sub&gt;In(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt; with Synchrotron X-Ray Powder Diffraction Data. J. Solid State Chem., 168(1), 237-244. doi: 10.1006/jssc.2002.9716</mixed-citation><mixed-citation xml:lang="en">Belik A.A., Izumi F., Ikeda T., Okui M., Malakho A.P., Morozov V.A., Lazoryak B.I. (2002) Whitlockite-Related Phosphates Sr&lt;sub&gt;9&lt;/sub&gt;A(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt; (A=Sc, Cr, Fe, Ga, and In): Structure Refinement of Sr&lt;sub&gt;9&lt;/sub&gt;In(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt; with Synchrotron X-Ray Powder Diffraction Data. J. Solid State Chem., 168(1), 237-244. doi: 10.1006/jssc.2002.9716</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Belik A.A., Izumi F., Stefanovich S.Y., Malakho A.P., Lazoryak B.I., Leonidov I.A., Leonidova O.N., Davydov S.A. (2002) Polar and Centrosymmetric Phases in Solid Solutions Ca&lt;sub&gt;3-x&lt;/sub&gt;Srx(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt; (0 ≤ x ≤ 16/7). Chem. Mater., 14(7), 3197-3205. doi: 10.1021/cm020243l</mixed-citation><mixed-citation xml:lang="en">Belik A.A., Izumi F., Stefanovich S.Y., Malakho A.P., Lazoryak B.I., Leonidov I.A., Leonidova O.N., Davydov S.A. (2002) Polar and Centrosymmetric Phases in Solid Solutions Ca&lt;sub&gt;3-x&lt;/sub&gt;Srx(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt; (0 ≤ x ≤ 16/7). Chem. Mater., 14(7), 3197-3205. doi: 10.1021/cm020243l</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Britvin S.N., Pakhomovskii Y.A., Bogdanova A.N., Skiba V.I. (1991) Strontiowhitlockite, Sr&lt;sub&gt;9&lt;/sub&gt;Mg(PO&lt;sub&gt;3&lt;/sub&gt;OH) (PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;6&lt;/sub&gt;, a new mineral species from the Kovdor Depo sit, Kola Peninsula, U.S.S.R. Can. Mineral., 29(1), 87-93.</mixed-citation><mixed-citation xml:lang="en">Britvin S.N., Pakhomovskii Y.A., Bogdanova A.N., Skiba V.I. (1991) Strontiowhitlockite, Sr&lt;sub&gt;9&lt;/sub&gt;Mg(PO&lt;sub&gt;3&lt;/sub&gt;OH) (PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;6&lt;/sub&gt;, a new mineral species from the Kovdor Depo sit, Kola Peninsula, U.S.S.R. Can. Mineral., 29(1), 87-93.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Deyneko D.V., Aksenov S.M., Nikiforov I.V., Stefanovich S.Y., Lazoryak B.I. (2020) Symmetry Inhomogeneity of Ca&lt;sub&gt;9-x&lt;/sub&gt;Zn&lt;sub&gt;x&lt;/sub&gt;Eu(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt; Phosphor Determined by Second-Harmonic Generation and Dielectric and Photoluminescence Spectroscopy. Cryst. Growth Des., 20(10), 6461-6468. doi: 10.1021/acs.cgd.0c00637</mixed-citation><mixed-citation xml:lang="en">Deyneko D.V., Aksenov S.M., Nikiforov I.V., Stefanovich S.Y., Lazoryak B.I. (2020) Symmetry Inhomogeneity of Ca&lt;sub&gt;9-x&lt;/sub&gt;Zn&lt;sub&gt;x&lt;/sub&gt;Eu(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt; Phosphor Determined by Second-Harmonic Generation and Dielectric and Photoluminescence Spectroscopy. Cryst. Growth Des., 20(10), 6461-6468. doi: 10.1021/acs.cgd.0c00637</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Deyneko D.V., Nikiforov I.V., Spassky D.A., Dikhtyar Y.Y., Aksenov S.M., Stefanovich S.Y., Lazoryak B.I. (2019) Luminescence of Eusup&gt;3+&lt;/sup&gt; as a probe for the determination of the local site symmetry in β-Ca&lt;sub&gt;3&lt;/sub&gt;(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;-related structures. CrystEngComm, 21(35), 5235-5242. doi: 10.1039/C9CE00931K</mixed-citation><mixed-citation xml:lang="en">Deyneko D.V., Nikiforov I.V., Spassky D.A., Dikhtyar Y.Y., Aksenov S.M., Stefanovich S.Y., Lazoryak B.I. (2019) Luminescence of Eusup&gt;3+&lt;/sup&gt; as a probe for the determination of the local site symmetry in β-Ca&lt;sub&gt;3&lt;/sub&gt;(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;-related structures. CrystEngComm, 21(35), 5235-5242. doi: 10.1039/C9CE00931K</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Du F., Nakai Y., Tsuboi T., Huang Y., Seo H.J. (2011) Luminescence properties and site occupations of Eu&lt;sup&gt;3+&lt;/sup&gt; ions doped in double phosphates Ca&lt;sub&gt;9&lt;/sub&gt;R(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt; (R = Al, Lu). J. Mater. Chem., 21(12), 4669-4678. doi: 10.1039/C0JM03324C</mixed-citation><mixed-citation xml:lang="en">Du F., Nakai Y., Tsuboi T., Huang Y., Seo H.J. (2011) Luminescence properties and site occupations of Eu&lt;sup&gt;3+&lt;/sup&gt; ions doped in double phosphates Ca&lt;sub&gt;9&lt;/sub&gt;R(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt; (R = Al, Lu). J. Mater. Chem., 21(12), 4669-4678. doi: 10.1039/C0JM03324C</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Kim D., Seo Y.W., Park S.H., Choi B.C., Kim J.H., Jeong J.H. (2020) Theoretical design and characterization of high efficient Sr&lt;sub&gt;9&lt;/sub&gt;Ln(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt;: Eu&lt;sup&gt;2+/sup&gt; phosphors. Mater. Res. Bull., 127, 110856. doi: 10.1016/j.materresbull.2020.110856</mixed-citation><mixed-citation xml:lang="en">Kim D., Seo Y.W., Park S.H., Choi B.C., Kim J.H., Jeong J.H. (2020) Theoretical design and characterization of high efficient Sr&lt;sub&gt;9&lt;/sub&gt;Ln(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt;: Eu&lt;sup&gt;2+/sup&gt; phosphors. Mater. Res. Bull., 127, 110856. doi: 10.1016/j.materresbull.2020.110856</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Kong J., Wang Y., Tong W., Li L., Xu Y., Chen N., Liu N. (2024) Highly efficient cyan-red emission in self-activated Sr&lt;sub&gt;9&lt;/sub&gt;In(VO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt;:&lt;sub&gt;x&lt;/sub&gt;Eu&lt;sup&gt;sup&gt;3+&lt;/sup&gt;&lt;/sup&gt; phosphors for applications in W-LEDs and optical thermometry. J. Alloys Compd., 983, 173936. doi: 10.1016/j.jallcom.2024.173936</mixed-citation><mixed-citation xml:lang="en">Kong J., Wang Y., Tong W., Li L., Xu Y., Chen N., Liu N. (2024) Highly efficient cyan-red emission in self-activated Sr&lt;sub&gt;9&lt;/sub&gt;In(VO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt;:&lt;sub&gt;x&lt;/sub&gt;Eu&lt;sup&gt;sup&gt;3+&lt;/sup&gt;&lt;/sup&gt; phosphors for applications in W-LEDs and optical thermometry. J. Alloys Compd., 983, 173936. doi: 10.1016/j.jallcom.2024.173936</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Ma X., Sun S., Ma J. (2019) A novel orange-red Sr&lt;sub&gt;9&lt;/sub&gt;Ga(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt;:Sm&lt;sup&gt;3+&lt;/sup&gt; phosphors for white light emitting dio des. Materials Res. Express, 6(11), 116207. doi: 10.1088/2053-1591/ab47c6</mixed-citation><mixed-citation xml:lang="en">Ma X., Sun S., Ma J. (2019) A novel orange-red Sr&lt;sub&gt;9&lt;/sub&gt;Ga(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt;:Sm&lt;sup&gt;3+&lt;/sup&gt; phosphors for white light emitting dio des. Materials Res. Express, 6(11), 116207. doi: 10.1088/2053-1591/ab47c6</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Morozov V.A., Belik A.A., Stefanovich S.Y., Grebenev V.V., Lebedev O.I., Van Tendeloo G., Lazoryak B.I. (2002) High-temperature phase transition in the whitlockite-type phosphate Ca9In(PO4)7. J. Solid State Chem., 165(2), 278-288.</mixed-citation><mixed-citation xml:lang="en">Morozov V.A., Belik A.A., Stefanovich S.Y., Grebenev V.V., Lebedev O.I., Van Tendeloo G., Lazoryak B.I. (2002) High-temperature phase transition in the whitlockite-type phosphate Ca9In(PO4)7. J. Solid State Chem., 165(2), 278-288.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Nikiforov I.V., Spassky D.A., Krutyak N.R., Shendrik R.Y., Zhukovskaya E.S., Aksenov S.M., Deyneko D.V. (2024) Co-Doping Effect of Mn&lt;sup&gt;2+&lt;/sup&gt; and Eu&lt;sup&gt;3+&lt;/sup&gt; on Luminescence in Strontiowhitlockite Phosphors. Molecules, 29(1). doi: 10.3390/molecules29010124</mixed-citation><mixed-citation xml:lang="en">Nikiforov I.V., Spassky D.A., Krutyak N.R., Shendrik R.Y., Zhukovskaya E.S., Aksenov S.M., Deyneko D.V. (2024) Co-Doping Effect of Mn&lt;sup&gt;2+&lt;/sup&gt; and Eu&lt;sup&gt;3+&lt;/sup&gt; on Luminescence in Strontiowhitlockite Phosphors. Molecules, 29(1). doi: 10.3390/molecules29010124</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Yu M., Lin J., Wang S.B. (2005) Effects of xand R&lt;sup&gt;3+&lt;/sup&gt; on the luminescent properties of Eu&lt;sup&gt;3+&lt;/sup&gt; in nanocrystalline YV&lt;sub&gt;x&lt;/sub&gt;P1-xO&lt;sub&gt;4&lt;/sub&gt;:Eu&lt;sup&gt;3+&lt;/sup&gt; and RVO1:Eu&lt;sup&gt;3+&lt;/sup&gt; thin-film phosphors. Applied Physics A, 80(2), 353-360. doi: 10.1007/s00339-003-2230-5.</mixed-citation><mixed-citation xml:lang="en">Yu M., Lin J., Wang S.B. (2005) Effects of xand R&lt;sup&gt;3+&lt;/sup&gt; on the luminescent properties of Eu&lt;sup&gt;3+&lt;/sup&gt; in nanocrystalline YV&lt;sub&gt;x&lt;/sub&gt;P1-xO&lt;sub&gt;4&lt;/sub&gt;:Eu&lt;sup&gt;3+&lt;/sup&gt; and RVO1:Eu&lt;sup&gt;3+&lt;/sup&gt; thin-film phosphors. Applied Physics A, 80(2), 353-360. doi: 10.1007/s00339-003-2230-5.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Yu Q., Wang L., Huang P., Shi Q., Tian Y., Cui C.E. (2020) Synthesis and photoluminescence properties of Eu&lt;sup&gt;2+&lt;/sup&gt;-activated Sr&lt;sub&gt;9&lt;/sub&gt;In&lt;sub&gt;1-y&lt;/sub&gt;Lu&lt;sub&gt;y&lt;/sub&gt;(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt; phosphors. J. Mater. Sci. – Mater. Electron., 31(1), 196-201. doi: 10.1007/s10854-018-0501-3</mixed-citation><mixed-citation xml:lang="en">Yu Q., Wang L., Huang P., Shi Q., Tian Y., Cui C.E. (2020) Synthesis and photoluminescence properties of Eu&lt;sup&gt;2+&lt;/sup&gt;-activated Sr&lt;sub&gt;9&lt;/sub&gt;In&lt;sub&gt;1-y&lt;/sub&gt;Lu&lt;sub&gt;y&lt;/sub&gt;(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;7&lt;/sub&gt; phosphors. J. Mater. Sci. – Mater. Electron., 31(1), 196-201. doi: 10.1007/s10854-018-0501-3</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Zhang J., Cai G., Wang W., Ma L., Wang X., Jin Z. (2020) Tuning of Emission by Eu&lt;sup&gt;3+&lt;/sup&gt; Concentration in a Pyrophosphate: The Effect of Local Symmetry. Inorg. Chem., 59(4), 2241-2247. doi: 10.1021/acs.inorgchem.9b02949</mixed-citation><mixed-citation xml:lang="en">Zhang J., Cai G., Wang W., Ma L., Wang X., Jin Z. (2020) Tuning of Emission by Eu&lt;sup&gt;3+&lt;/sup&gt; Concentration in a Pyrophosphate: The Effect of Local Symmetry. Inorg. Chem., 59(4), 2241-2247. doi: 10.1021/acs.inorgchem.9b02949</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
