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Crystal Chemistry and Thermodynamic Properties of Mineralogically Probable Phosphate Ca2.62Cu1.94Co1.44(PO4)4— Structurally Related to Natural Arsenate Zubkovaiteстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 1 октября 2025 г.
- Авторы: Yakubovich Olga, Kiriukhina Galina, Shvanskaya Larisa, Vasiliev Alexander
- Журнал: Minerals
- Том: 15
- Номер: 6
- Год издания: 2025
- Номер статьи: 645
- DOI: 10.3390/min15060645
- Аннотация: In this paper, we report the details of the synthesis, single crystal X-ray diffraction study, comparative crystal chemical analysis, and magnetic behavior of a new phosphate variation of the arsenate mineral zubkovaite. The title compound was obtained as ahigh-temperature flux product in the form of a partly ordered solid solution and was studied using scanning electron microscopy and microprobe analysis. It possesses a monoclinic symmetry with a P21/n space group; the unit cell parameters are a = 8.8040 (2), b =4.8970 (1), c = 14.5772 (3), and β = 93.993(2)°. The Ca2.62Cu1.94Co1.44(PO4)4 crystal structure exhibits some statistical disorder. Our refinement showed that two positions are mixed, being occupied by Cu/Co (M1) and Ca/Co (M2) atoms. Two types of layers that are nearly parallel to the (101) plane can be distinguished in the structure. One of them is built by sharing corners of CuO4 squares, M1O5 square pyramids, and PO4 tetrahedra. The second type of layer formed from Ca2+- and M2+-centered polyhedra alternates in the [1ത01] direction to construct a tri-periodic framework. Ca2.62Cu1.94Co1.44(PO4)4 experiences long-range antiferromagnetic ordering at low temperatures, as evidenced by both dc—and ac—magnetic susceptibilities, as well as by the specific heat measurements.
- Добавил в систему: Шванская Лариса Викторовна
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