КРИСТАЛЛИЧЕСКАЯ СТРУКТУРА И ФАЗОВЫЕ ПРЕВРАЩЕНИЯ CA[(UО2)6(MOО4)7(H2О)2](H2О)N (N ~ 7.6)

dc.contributor.author	Назарчук Е.В.
dc.contributor.author	Кривовичев С.В.
dc.contributor.author	Бернс П.К.
dc.date.accessioned	2022-12-02T04:36:08Z
dc.date.available	2022-12-02T04:36:08Z
dc.date.issued	2005
dc.identifier	https://www.elibrary.ru/item.asp?id=9136364
dc.identifier.citation	Записки Российского минералогического общества, 2005, 134, 2, 110-120
dc.identifier.issn	0869-6055
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/40584
dc.description.abstract	The new calcium uranyl molybdate, Ca[(UO2)6(MoO4)7(H2O)2](H2O)n (n ~ 7.6), was synthesized by hyd-rothermal method. The compound is orthorhombic, space group C2221, a= 11.3691(9), b= 20.0311(15), c = 23.8333(18) Å3, V= 5427.7(7) Å 3. Crystal structure has been determined by direct methods and refined to R, = 0.05 on the base of 3473 independent reflections. Structure is based upon framework of corner-sharing UO7 pen-tagonal bipyramids and MoO4 tetrahedra. The Ca2+ ions and H2O groups reside within the framework cavities. Phase transformations of Ca[(UO2)6(MoO4)7(H2O)2](H2O)n (n ~ 7.6) were studied by the high-temperature X-ray powder diffraction method. The compound is stable until 450 ± 25 °C, at that temperature it decomposes into UO2MoO4 and CaO.
dc.title	КРИСТАЛЛИЧЕСКАЯ СТРУКТУРА И ФАЗОВЫЕ ПРЕВРАЩЕНИЯ CA[(UО2)6(MOО4)7(H2О)2](H2О)N (N ~ 7.6)
dc.type	Статья
dc.subject.udc	549.02.548.73.546.791

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