{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:54:53Z","timestamp":1760147693201,"version":"build-2065373602"},"reference-count":55,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2023,2,23]],"date-time":"2023-02-23T00:00:00Z","timestamp":1677110400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Institute of Spectroscopy of the Russian Academy of sciences","award":["FFUU-2022-0003","NSh-776.2022.1.2"],"award-info":[{"award-number":["FFUU-2022-0003","NSh-776.2022.1.2"]}]},{"name":"Leading Scientific School of the Russian Federation","award":["FFUU-2022-0003","NSh-776.2022.1.2"],"award-info":[{"award-number":["FFUU-2022-0003","NSh-776.2022.1.2"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>In this work, isothermal sections of the Ln2O3\u2013Cr2O3\u2013B2O3 (Ln = Gd\u2013Lu) ternary oxide systems at 900, 1000, and 1100 \u00b0C were constructed by determining the phase relations by using a powder X-ray diffraction technique. As a result, these systems were divided into subsidiary subsystems. Two types of double borates, LnCr3(BO3)4 (Ln = Gd\u2013Er) and LnCr(BO3)2 (Ln = Ho\u2013Lu), were observed in the investigated systems. Regions of phase stability for LnCr3(BO3)4 and LnCr(BO3)2 were determined. It was shown that the LnCr3(BO3)4 compounds crystallized in rhombohedral and monoclinic polytype modifications up to 1100 \u00b0C; above this temperature and up to the melting points, the monoclinic modification was predominantly formed. The LnCr3(BO3)4 (Ln = Gd\u2013Er) and LnCr(BO3)2 (Ln = Ho\u2013Lu) compounds were characterized by using a powder X-ray diffraction method and thermal analysis.<\/jats:p>","DOI":"10.3390\/ma16051831","type":"journal-article","created":{"date-parts":[[2023,2,23]],"date-time":"2023-02-23T04:32:33Z","timestamp":1677126753000},"page":"1831","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Phase Relations in the Ln2O3\u2013Cr2O3\u2013B2O3 (Ln = Gd\u2013Lu) Ternary Oxide Systems"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2802-1546","authenticated-orcid":false,"given":"Nikolai","family":"Kuzmin","sequence":"first","affiliation":[{"name":"Faculty of Geology, Moscow State University, 119991 Moscow, Russia"},{"name":"Institute of Spectroscopy, Russian Academy of Science, Troitsk, 108840 Moscow, Russia"},{"name":"Landau Phystech School of Physics and Research, Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Victor","family":"Maltsev","sequence":"additional","affiliation":[{"name":"Faculty of Geology, Moscow State University, 119991 Moscow, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elizaveta","family":"Mikliaeva","sequence":"additional","affiliation":[{"name":"Branch \u201cAprelevka Department of VNIGNI\u201d, All-Russian Research Geological Oil Institute, 143360 Aprelevka, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6117-6278","authenticated-orcid":false,"given":"Elena","family":"Volkova","sequence":"additional","affiliation":[{"name":"Faculty of Geology, Moscow State University, 119991 Moscow, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3784-7294","authenticated-orcid":false,"given":"Kirill","family":"Boldyrev","sequence":"additional","affiliation":[{"name":"Institute of Spectroscopy, Russian Academy of Science, Troitsk, 108840 Moscow, Russia"},{"name":"Landau Phystech School of Physics and Research, Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elizaveta","family":"Koporulina","sequence":"additional","affiliation":[{"name":"Faculty of Geology, Moscow State University, 119991 Moscow, Russia"},{"name":"Melnikov Research Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Science, 111020 Moscow, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,23]]},"reference":[{"key":"ref_1","first-page":"143","article-title":"Liquid Immiscibility in Oxide Systems","volume":"Volume 3","author":"Alper","year":"1970","journal-title":"Phase Diagrams: Materials Science and Technology"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1111\/j.1151-2916.1961.tb15356.x","article-title":"Immiscibility and the System Lanthanum Oxide-Boric Oxide","volume":"44","author":"Levin","year":"1961","journal-title":"J. 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