New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure

Phase relations in the La2O3 – Eu2O3 – MoO3 ternary system were studied using polycrystalline samples obtained in air at 1250°C via solid-state reaction of metal oxides. The system contains a broad region of a cubic fluorite-like phase of lanthanum-europium molybdates, named LEMO, which is isostruct...

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Principais autores:	Berezhnaya, T. S., Бережная, Т. С., Chebyshev, K. A., Чебышев, К. А., Kabanov, R. V., Кабанов, Р. В.
Formato:	Статья
Idioma:	English
Publicado em:	Elsevier Ltd 2025
Assuntos:	Europium molybdate Luminescence Fluorite crystal structure Ionic conductivity
Acesso em linha:	https://dspace.ncfu.ru/handle/123456789/30439
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spelling	ir-123456789-304392025-05-07T09:31:56Z New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure Berezhnaya, T. S. Бережная, Т. С. Chebyshev, K. A. Чебышев, К. А. Kabanov, R. V. Кабанов, Р. В. Europium molybdate Luminescence Fluorite crystal structure Ionic conductivity Phase relations in the La2O3 – Eu2O3 – MoO3 ternary system were studied using polycrystalline samples obtained in air at 1250°C via solid-state reaction of metal oxides. The system contains a broad region of a cubic fluorite-like phase of lanthanum-europium molybdates, named LEMO, which is isostructural with Nd5Mo3O16+δ. However, the homogeneity range of this phase is quite limited and occurs at a lower MoO₃ content compared to neodymium molybdate. The citrate method was applied for the synthesis of LEMO ceramic samples with a relative density of 98 %. The crystal structure of La2.5Eu2.5Mo2.625O15.75 was analyzed by the Rietveld refinement using powder XRD data. The analysis revealed structural features of this europium-containing fluorite-like molybdate, specifically the splitting of oxygen atomic positions in the octahedral voids within the fluorite structure. The fluorite-like molybdate samples exhibited high electrical conductivity, with the grain bulk contribution at about 10−2 S/cm at 900°C, and intense red luminescence under near-UV and blue radiation. 2025-05-07T09:30:33Z 2025-05-07T09:30:33Z 2025 Статья Berezhnaya T.S., Chebyshev K.A., Kabanov R.V. New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure // Journal of Alloys and Compounds. - 2025. - 1023. - art. no. 180138. - DOI: 10.1016/j.jallcom.2025.180138 https://dspace.ncfu.ru/handle/123456789/30439 en Journal of Alloys and Compounds application/pdf application/pdf Elsevier Ltd
institution	СКФУ
collection	Репозиторий
language	English
topic	Europium molybdate Luminescence Fluorite crystal structure Ionic conductivity
spellingShingle	Europium molybdate Luminescence Fluorite crystal structure Ionic conductivity Berezhnaya, T. S. Бережная, Т. С. Chebyshev, K. A. Чебышев, К. А. Kabanov, R. V. Кабанов, Р. В. New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure
description	Phase relations in the La2O3 – Eu2O3 – MoO3 ternary system were studied using polycrystalline samples obtained in air at 1250°C via solid-state reaction of metal oxides. The system contains a broad region of a cubic fluorite-like phase of lanthanum-europium molybdates, named LEMO, which is isostructural with Nd5Mo3O16+δ. However, the homogeneity range of this phase is quite limited and occurs at a lower MoO₃ content compared to neodymium molybdate. The citrate method was applied for the synthesis of LEMO ceramic samples with a relative density of 98 %. The crystal structure of La2.5Eu2.5Mo2.625O15.75 was analyzed by the Rietveld refinement using powder XRD data. The analysis revealed structural features of this europium-containing fluorite-like molybdate, specifically the splitting of oxygen atomic positions in the octahedral voids within the fluorite structure. The fluorite-like molybdate samples exhibited high electrical conductivity, with the grain bulk contribution at about 10−2 S/cm at 900°C, and intense red luminescence under near-UV and blue radiation.
format	Статья
author	Berezhnaya, T. S. Бережная, Т. С. Chebyshev, K. A. Чебышев, К. А. Kabanov, R. V. Кабанов, Р. В.
author_facet	Berezhnaya, T. S. Бережная, Т. С. Chebyshev, K. A. Чебышев, К. А. Kabanov, R. V. Кабанов, Р. В.
author_sort	Berezhnaya, T. S.
title	New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure
title_short	New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure
title_full	New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure
title_fullStr	New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure
title_full_unstemmed	New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure
title_sort	new fluorite-like lanthanum-europium molybdates with nd5mo3o16+δ-type structure
publisher	Elsevier Ltd
publishDate	2025
url	https://dspace.ncfu.ru/handle/123456789/30439
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New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure

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