Structure and thermal expansion of the low-temperature phase of SF ₂
Powder x-ray and neutron diffraction studies of the crystalline structure, lattice parameters and thermal expansion coefficients of sulphur hexafluoride SF₆ are performed in the temperature range 1.64-110 K. It is shown that the low-temperature phase (at T < 94.3 K) is monoclinic, space group C2/...
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| Дата: | 2000 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2000
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| Назва видання: | Физика низких температур |
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| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/129065 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Structure and thermal expansion of the low-temperature phase of SF ₂ / A.P. Isakina and A.I. Prokhvatilov, J. Rodriguez-Carvajal // Физика низких температур. — 2000. — Т. 26, № 4. — С. 404-414. — Бібліогр.: 28 назв. — англ. |
Репозитарії
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irk-123456789-1290652018-01-17T03:03:06Z Structure and thermal expansion of the low-temperature phase of SF ₂ Isakina, A.P. Prokhvatilov, A.I. Rodriguez-Carvajal, J. Динамика кристаллической решетки Powder x-ray and neutron diffraction studies of the crystalline structure, lattice parameters and thermal expansion coefficients of sulphur hexafluoride SF₆ are performed in the temperature range 1.64-110 K. It is shown that the low-temperature phase (at T < 94.3 K) is monoclinic, space group C2/m (C2h³ ) with Z=6 in which 1/3 of molecules SF₆ occupy the positions of higher symmetry (2/m) and 2/3 of molecules - lower one (m). As follows from the analysis of obtained structural results, an availability of two types of molecular local symmetry positions is responsible for the anisotropic character of molecular rotation, peculiarities on the temperature dependences of structural and thermo-dynamic properties of SF₆ crystals at low-temperature phase, especially near Tc of orientational phase transition. It is carried out a detail comparison the present results with the known literature data. 2000 Article Structure and thermal expansion of the low-temperature phase of SF ₂ / A.P. Isakina and A.I. Prokhvatilov, J. Rodriguez-Carvajal // Физика низких температур. — 2000. — Т. 26, № 4. — С. 404-414. — Бібліогр.: 28 назв. — англ. 0132-6414 PACS: 61.10.-i, 61.12.-q, 61.50.Ks, 61.50.Em, 65.70.+y, 65.50.+m http://dspace.nbuv.gov.ua/handle/123456789/129065 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Динамика кристаллической решетки Динамика кристаллической решетки |
| spellingShingle |
Динамика кристаллической решетки Динамика кристаллической решетки Isakina, A.P. Prokhvatilov, A.I. Rodriguez-Carvajal, J. Structure and thermal expansion of the low-temperature phase of SF ₂ Физика низких температур |
| description |
Powder x-ray and neutron diffraction studies of the crystalline structure, lattice parameters and thermal expansion coefficients of sulphur hexafluoride SF₆ are performed in the temperature range 1.64-110 K. It is shown that the low-temperature phase (at T < 94.3 K) is monoclinic, space group C2/m (C2h³ ) with Z=6 in which 1/3 of molecules SF₆ occupy the positions of higher symmetry (2/m) and 2/3 of molecules - lower one (m). As follows from the analysis of obtained structural results, an availability of two types of molecular local symmetry positions is responsible for the anisotropic character of molecular rotation, peculiarities on the temperature dependences of structural and thermo-dynamic properties of SF₆ crystals at low-temperature phase, especially near Tc of orientational phase transition. It is carried out a detail comparison the present results with the known literature data. |
| format |
Article |
| author |
Isakina, A.P. Prokhvatilov, A.I. Rodriguez-Carvajal, J. |
| author_facet |
Isakina, A.P. Prokhvatilov, A.I. Rodriguez-Carvajal, J. |
| author_sort |
Isakina, A.P. |
| title |
Structure and thermal expansion of the low-temperature phase of SF ₂ |
| title_short |
Structure and thermal expansion of the low-temperature phase of SF ₂ |
| title_full |
Structure and thermal expansion of the low-temperature phase of SF ₂ |
| title_fullStr |
Structure and thermal expansion of the low-temperature phase of SF ₂ |
| title_full_unstemmed |
Structure and thermal expansion of the low-temperature phase of SF ₂ |
| title_sort |
structure and thermal expansion of the low-temperature phase of sf ₂ |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2000 |
| topic_facet |
Динамика кристаллической решетки |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/129065 |
| citation_txt |
Structure and thermal expansion of the low-temperature phase of SF ₂ / A.P. Isakina and A.I. Prokhvatilov, J. Rodriguez-Carvajal // Физика низких температур. — 2000. — Т. 26, № 4. — С. 404-414. — Бібліогр.: 28 назв. — англ. |
| series |
Физика низких температур |
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AT isakinaap structureandthermalexpansionofthelowtemperaturephaseofsf2 AT prokhvatilovai structureandthermalexpansionofthelowtemperaturephaseofsf2 AT rodriguezcarvajalj structureandthermalexpansionofthelowtemperaturephaseofsf2 |
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2023-10-18T20:56:46Z |
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2023-10-18T20:56:46Z |
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