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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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">geolmsu</journal-id><journal-title-group><journal-title xml:lang="ru">ВЕСТНИК МОСКОВСКОГО УНИВЕРСИТЕТА. СЕРИЯ 4. ГЕОЛОГИЯ</journal-title><trans-title-group xml:lang="en"><trans-title>Moscow University Bulletin. Series 4. Geology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0579-9406</issn><publisher><publisher-name>Издательский Дом МГУ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.55959/MSU0579-9406-4-2026-65-3-3-11</article-id><article-id custom-type="elpub" pub-id-type="custom">geolmsu-921</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Структурные принципы новых минералов класса арсенатов из фумарольных эксгаляций вулкана Толбачик (Камчатка)</article-title><trans-title-group xml:lang="en"><trans-title>Structural principles of new arsenate minerals from fumarole sublimates of the Tolbachik volcano (Kamchatka)</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>Пущаровский</surname><given-names>Д. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Pushcharovsky</surname><given-names>D. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дмитрий Юрьевич Пущаровский</p><p>Москва</p></bio><bio xml:lang="en"><p>Dmitry Yu. Pushcharovsky</p><p>Moscow</p></bio><email xlink:type="simple">dmitp01@mail.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>Пеков</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pekov</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Игорь Викторович Пеков</p><p>Москва</p></bio><bio xml:lang="en"><p>Igor V. Pekov</p><p>Moscow</p></bio><email xlink:type="simple">igorpekov@mail.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>Зубкова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zubkova</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Наталья Витальевна Зубкова</p><p>Москва</p></bio><bio xml:lang="en"><p>Natalia V. Zubkova</p><p>Moscow</p></bio><email xlink:type="simple">n.v.zubkova@gmail.com</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>Кошлякова</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Koshlyakova</surname><given-names>N. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Наталия Николаевна Кошлякова</p><p>Москва</p></bio><bio xml:lang="en"><p>Natalia N. Koshlyakova</p><p>Moscow</p></bio><email xlink:type="simple">n.koshlyakova@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский государственный университет имени М.В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>14</day><month>07</month><year>2026</year></pub-date><volume>65</volume><issue>3</issue><fpage>3</fpage><lpage>11</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Пущаровский Д.Ю., Пеков И.В., Зубкова Н.В., Кошлякова Н.Н., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Пущаровский Д.Ю., Пеков И.В., Зубкова Н.В., Кошлякова Н.Н.</copyright-holder><copyright-holder xml:lang="en">Pushcharovsky D.Y., Pekov I.V., Zubkova N.V., Koshlyakova N.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://vestnik.geol.msu.ru/jour/article/view/921">https://vestnik.geol.msu.ru/jour/article/view/921</self-uri><abstract><p>Дана структурная характеристика пяти новых арсенатов, недавно открытых в активной фумароле Арсенатная на вершине Второго шлакового конуса Северного прорыва Большого трещинного Толбачинского извержения (вулканический массив Толбачик, Камчатка). В структурах трех медных арсенатов установлены полиэдрические комплексы из связанных по ребрам тетрагональных пирамид CuO5 или CuO4Cl. В гетерополиэдрических каркасах Fe-содержащих арсенатов ахирофанита (K2Na)(Fe3+4Ti)O2(AsO4)5 и манганобадаловита Na2MnMgFe3+(AsO4)3 выделены димеры из попарно связанных по ребрам Fe-октаэдров. Проведено сравнение исследованных структур с представителями групп лавендулана NaCaCu5(AsO4)4Cl·5H2O, аллюодита Na2(Fe3+,Mn2+)3(PO4) и другими близкими по кристаллохимии минералами. Отмечено, что по числу открытых минералов (153) вулкан Толбачик на сегодня является безусловным мировым рекордсменом.</p></abstract><trans-abstract xml:lang="en"><p>The structural characteristics of five new arsenates recently discovered in the active Arsenatnaya fumarole at the summit of the Second Scoria Cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption (Tolbachik volcano, Kamchatka, Russia) are given. Polyhedral complexes of edge-linked tetragonal pyramids CuO5 or CuO4Cl have been identified in the structures of three copper arsenates. Dimers formed by pairs of edge-linked Fe-octahedra have been identified in the heteropolyhedral frameworks of Fe-containing arsenates achyrophanite (K2Na)(Fe3+ 4Ti) O2(AsO4)5 and manganobadalovite Na2MnMgFe3+(AsO4)3. A comparison of the studied structures with representatives of the lavendulan NaCaCu5(AsO4)4Cl·5H2O and alluaudite Na2(Fe3+,Mn2+)3(PO4) groups, as well as with other minerals with similar crystal chemistry was carried out. It has been noted that in number of first discovered minerals (153), the Tolbachik volcano now is the world record holder.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>новые арсенатные минералы</kwd><kwd>арсенаты меди и железа</kwd><kwd>структурные типы</kwd><kwd>вулканические эксгаляции</kwd><kwd>фумарола Арсенатная</kwd><kwd>вулкан Толбачик</kwd><kwd>Камчатка</kwd></kwd-group><kwd-group xml:lang="en"><kwd>new arsenate minerals</kwd><kwd>copper and iron arsenates</kwd><kwd>structure types</kwd><kwd>volcanic sublimates</kwd><kwd>Arsenatnaya fumaroles</kwd><kwd>Tolbachik volcano</kwd><kwd>Kamchatka</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Российского научного фонда, проект № 25-17-00005 «Природные кислородные соединения селена, теллура и мышьяка: кристаллохимическая специфика, новые твердые растворы, генетическая минералогия, геохимическое и экологическое значение».</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">Большое трещинное Толбачинское извержение, Камчатка, 1975–1976 / Под ред. 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