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Crystal structure and thermodynamic properties of dinickel diphosphate dihydrate Ni2(H2O)2[P2O7]статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 12 января 2022 г.
- Авторы: Kiriukhina G.V., Yakubovich O.V., Shvanskaya L.V., Ovchenkov Y.A., Volkov A.S., Dimitrova O.V., Simonov S.V., Vasiliev A.N.
- Журнал: Dalton Transactions
- Том: 49
- Год издания: 2020
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 17368
- Последняя страница: 17374
- DOI: 10.1039/D0DT03505J
- Аннотация: Single crystals of dinickel diphosphate dihydrate, Ni2(H2O)2[P2O7] have been synthesized by hydrothermal method. Its structure was refined in monoclinic P21/n space group (unit cell parameters a = 6.2517(1) Å, b = 13.7892(3) Å, c = 7.2894(2) Å, β = 94.507(2)A, V = 626.45(2) Å3, Z = 4) based on low-temperature X-ray diffruction data till R – 0.016. Corrugated chains of NiO5(H2O) octahedra sharing edges are aligned in the [10¯1] direction. They are linked into a three-dimensional framework through diphosphate groups and hydrogen bonds. A detailed crystal chemical analysis of the family Me2(H2O)2[X2O7] revealed correlations between the unit-cell parameters of the isotypic transition metal phosphates and arsenates, their structural features and the sizes of structure forming cations. Despite isolation of the cis and trans edge-sharing infinite zigzag chains of Ni-centered octahedra from each other no pronounced low dimensionality is seen in magnetic response of Ni2(H2O)2[P2O7]. The magnetic susceptibility χ evidences short range correlation maximum at Tmax = 11.9 K accompanied by the onset of long – range magnetic order at TN = 9.4 K. Below TN, the title compound exhibits features of archetype three-dimensional easy-axis antiferromagnet which experience the sequence of spin-flop and spin-flip phase transitions. Basing on specific heat Cp and magnetization M studies, the magnetic phase diagram of Ni2(H2O)2[P2O7] has been established.
- Добавил в систему: Шванская Лариса Викторовна