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- Title
Calcium, Lanthanide, and Zirconium Vanadates with the Zircon Structure: Preparation, Structure, and Behavior during Heating.
- Authors
Koryttseva, A. K.; Orlova, A. I.; Litonova, N. S.; Nokhrin, A. V.; Murashov, A. A.; Smetanina, K. E.; Turchenko, V. A.; Beskrovnyi, A. I.; Borovikova, E. Yu.; Korshunov, D. M.
- Abstract
Using coprecipitation, we have synthesized LnVO4 (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°C. Their average thermal expansion coefficients lie in the range (6–11) × 10–6 K–1.
- Subjects
RARE earth metals; ZIRCON; ZIRCONIUM; VANADATES; RADIOACTIVE wastes; VIBRATIONAL spectra; CALCIUM
- Publication
Inorganic Materials, 2023, Vol 59, Issue 6, p619
- ISSN
0020-1685
- Publication type
Article
- DOI
10.1134/S0020168523060109