ДОСЛІДЖЕННЯ СТРУКТУРИ СПОЛУКИ YbAl2 МЕТОДОМ МОНОКРИСТАЛУ
A sample of nominal composition Yb33,3Al66,7 was synthesized from high-purity elements (Yb ≥ 98.9 wt.% and Al ≥ 99.999 wt.%) by arc-melting under a purified argon atmosphere, using Ti as a getter and a tungsten electrode. To achieve high efficiency of the interaction between the components, the samp...
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| Datum: | 2019 |
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| Format: | Artikel |
| Sprache: | Englisch |
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V.I.Vernadsky Institute of General and Inorganic Chemistry
2019
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| Online Zugang: | https://ucj.org.ua/index.php/journal/article/view/81 |
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| Назва журналу: | Ukrainian Chemistry Journal |
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Ukrainian Chemistry Journal| _version_ | 1856543745197998080 |
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| author | Manyako, Mykola Kowalska, Dorota Belan, Bohdana Gladyshevskii, Roman |
| author_facet | Manyako, Mykola Kowalska, Dorota Belan, Bohdana Gladyshevskii, Roman |
| author_sort | Manyako, Mykola |
| baseUrl_str | |
| collection | OJS |
| datestamp_date | 2019-11-04T11:07:56Z |
| description | A sample of nominal composition Yb33,3Al66,7 was synthesized from high-purity elements (Yb ≥ 98.9 wt.% and Al ≥ 99.999 wt.%) by arc-melting under a purified argon atmosphere, using Ti as a getter and a tungsten electrode. To achieve high efficiency of the interaction between the components, the sample was melted twice. The ingot was annealed at 500°C in an evacuated quartz ampoule for 720 h and subsequently quenched in cold water. The weight loss during the preparation of the sample was less than 1 % of the total mass, which was 2 g. The chemical composition of the selected crystals was checked with a field-emission scanning electron microscope (FEINovaNanoSEM 230) equipped with an EDS analyzer.
Laue and rotation diffraction patterns of selected single crystals showed cubic symmetry. Integrated intensities measured with graphite-monochromatized Мо Kα radiation (l = 0.71073 Å) on an Xcalibur Atlas CCD diffractometer confirmed the cubic lattice. The structure type MgCu2 was assigned and the structure was refined using the program SHELXL (full-matrix least-squares refinement on F2)] with anisotropic displacement parameters for all of the atoms: Pearson symbol cF24, space group Fd-3m, a = 7.7011(4) Å, V = 456.73(7) Å3, Z = 8, R = 0.0261, Rw = 0.0726 for 42 reflections.
It is well-known that the trivalent state is usual one for the rare earth metals. The dependence of the mean atomic volume of the RAl2 binary showed of the so-called “valence” fluctuation state for Eu and Yb. |
| first_indexed | 2025-09-24T17:43:32Z |
| format | Article |
| id | oai:ojs2.1444248.nisspano.web.hosting-test.net:article-81 |
| institution | Ukrainian Chemistry Journal |
| language | English |
| last_indexed | 2025-09-24T17:43:32Z |
| publishDate | 2019 |
| publisher | V.I.Vernadsky Institute of General and Inorganic Chemistry |
| record_format | ojs |
| spelling | oai:ojs2.1444248.nisspano.web.hosting-test.net:article-812019-11-04T11:07:56Z Single crystal investigation of the YbAl2 compound ИССЛЕДОВАНИЕ СТРУКТУРЫ СОЕДИНЕНИЯ YbAl2 МЕТОДОМ МОНОКРИСТАЛЛА ДОСЛІДЖЕННЯ СТРУКТУРИ СПОЛУКИ YbAl2 МЕТОДОМ МОНОКРИСТАЛУ Manyako, Mykola Kowalska, Dorota Belan, Bohdana Gladyshevskii, Roman X-ray single crystal investigation, crystal structure, ytterbium, aluminum, ytterbium dyaluminide. A sample of nominal composition Yb33,3Al66,7 was synthesized from high-purity elements (Yb ≥ 98.9 wt.% and Al ≥ 99.999 wt.%) by arc-melting under a purified argon atmosphere, using Ti as a getter and a tungsten electrode. To achieve high efficiency of the interaction between the components, the sample was melted twice. The ingot was annealed at 500°C in an evacuated quartz ampoule for 720 h and subsequently quenched in cold water. The weight loss during the preparation of the sample was less than 1 % of the total mass, which was 2 g. The chemical composition of the selected crystals was checked with a field-emission scanning electron microscope (FEINovaNanoSEM 230) equipped with an EDS analyzer. Laue and rotation diffraction patterns of selected single crystals showed cubic symmetry. Integrated intensities measured with graphite-monochromatized Мо Kα radiation (l = 0.71073 Å) on an Xcalibur Atlas CCD diffractometer confirmed the cubic lattice. The structure type MgCu2 was assigned and the structure was refined using the program SHELXL (full-matrix least-squares refinement on F2)] with anisotropic displacement parameters for all of the atoms: Pearson symbol cF24, space group Fd-3m, a = 7.7011(4) Å, V = 456.73(7) Å3, Z = 8, R = 0.0261, Rw = 0.0726 for 42 reflections. It is well-known that the trivalent state is usual one for the rare earth metals. The dependence of the mean atomic volume of the RAl2 binary showed of the so-called “valence” fluctuation state for Eu and Yb. V.I.Vernadsky Institute of General and Inorganic Chemistry 2019-10-16 Article Article Inorganic Chemistry Неорганическая химия Неорганічна хімія application/pdf https://ucj.org.ua/index.php/journal/article/view/81 10.33609/0041-6045.85.9.2019.25-30 Ukrainian Chemistry Journal; Vol. 85 No. 9 (2019): Ukrainian Chemistry Journal; 25-30 Украинский химический журнал; Том 85 № 9 (2019): Украинский химический журнал; 25-30 Український хімічний журнал; Том 85 № 9 (2019): Український хімічний журнал; 25-30 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/81/54 |
| spellingShingle | Manyako, Mykola Kowalska, Dorota Belan, Bohdana Gladyshevskii, Roman ДОСЛІДЖЕННЯ СТРУКТУРИ СПОЛУКИ YbAl2 МЕТОДОМ МОНОКРИСТАЛУ |
| title | ДОСЛІДЖЕННЯ СТРУКТУРИ СПОЛУКИ YbAl2 МЕТОДОМ МОНОКРИСТАЛУ |
| title_alt | Single crystal investigation of the YbAl2 compound ИССЛЕДОВАНИЕ СТРУКТУРЫ СОЕДИНЕНИЯ YbAl2 МЕТОДОМ МОНОКРИСТАЛЛА |
| title_full | ДОСЛІДЖЕННЯ СТРУКТУРИ СПОЛУКИ YbAl2 МЕТОДОМ МОНОКРИСТАЛУ |
| title_fullStr | ДОСЛІДЖЕННЯ СТРУКТУРИ СПОЛУКИ YbAl2 МЕТОДОМ МОНОКРИСТАЛУ |
| title_full_unstemmed | ДОСЛІДЖЕННЯ СТРУКТУРИ СПОЛУКИ YbAl2 МЕТОДОМ МОНОКРИСТАЛУ |
| title_short | ДОСЛІДЖЕННЯ СТРУКТУРИ СПОЛУКИ YbAl2 МЕТОДОМ МОНОКРИСТАЛУ |
| title_sort | дослідження структури сполуки ybal2 методом монокристалу |
| topic_facet | X-ray single crystal investigation crystal structure ytterbium aluminum ytterbium dyaluminide. |
| url | https://ucj.org.ua/index.php/journal/article/view/81 |
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