Calcium, Lanthanide, and Zirconium Vanadates with the Zircon Structure: Preparation, Structure, and Behavior during Heating

被引：0
|
作者：
Koryttseva, A. K. [1 ]
Orlova, A. I. [1 ]
Litonova, N. S. [1 ]
Nokhrin, A. V. [1 ]
Murashov, A. A. [1 ]
Smetanina, K. E. [1 ]
Turchenko, V. A. [2 ]
Beskrovnyi, A. I. [2 ]
Borovikova, E. Yu. [3 ]
Korshunov, D. M. [4 ]
机构：
[1] Lobachevsky State Univ Nizhny Novgorod, Nizhnii Novgorod 603022, Russia
[2] Joint Inst Nucl Res, Dubna 141980, Moscow Oblast, Russia
[3] Moscow MV Lomonosov State Univ, Fac Geol, Moscow 119991, Russia
[4] Russian Acad Sci, Geol Inst, Moscow 119017, Russia
来源：
INORGANIC MATERIALS | 2023年 / 59卷 / 06期
基金：
俄罗斯科学基金会;
关键词：
lanthanides; vanadates; zircon; TRIPLE ORTHOVANADATES; DIELECTRIC-PROPERTIES; CRYSTAL-STRUCTURE; SPECTRA; PHASE; PR; ND;
D O I：
10.1134/S0020168523060109
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Using coprecipitation, we have synthesized LnVO(4) (simple) and CaLnZr(VO4)(3) (Ln = Nd, Sm, Eu, Gd, Dy, Yb) (ternary) lanthanide orthovanadates; a La0.3Nd0.5Sm0.1Eu0.1VO4 solid solution, modeling the composition of the lanthanides in radioactive waste (all crystallizing in the zircon structure, sp. gr. I41/amd); and LaVO4, crystallizing in the monazite structure. Their unit-cell parameters have been shown to increase systematically with increasing lanthanide ionic radius. Their mid- and far-IR vibrational spectra suggest that their symmetry is lower than that of classical zircon. The synthesized compounds are stable up to 900 degrees C. Their average thermal expansion coefficients lie in the range (6-11) x 10(-6) K-1.
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收藏
页码：619 / 626
页数：8
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