Investigation of the Heterovalent Substitution Cadmium for Lanthanum in Molybdate La2MoO6
| Autor: | A. V. Ignatov, L. V. Pasechnik, E. I. Get`man, K. A. Chebyshev, N. I. Selikova |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Lanthanide
Cadmium Article Subject Chemistry Rietveld refinement Analytical chemistry chemistry.chemical_element General Chemistry Molybdate 010402 general chemistry 010403 inorganic & nuclear chemistry 01 natural sciences 0104 chemical sciences Tetragonal crystal system chemistry.chemical_compound Lanthanum Fourier transform infrared spectroscopy QD1-999 Powder diffraction |
| Zdroj: | Journal of Chemistry, Vol 2021 (2021) |
| ISSN: | 2090-9071 2090-9063 |
| DOI: | 10.1155/2021/5537048 |
| Popis: | This paper presents the investigation of the heterovalent substitution of cadmium for lanthanum in the La2-xCdxMoO6-x/2 system. The samples were synthesized by the solid state reaction method at 1000°C. The samples were characterized by X-ray powder diffraction with Rietveld refinements, scanning electron microscopy with energy-dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy methods. The study results revealed that cadmium incorporation in the lanthanum molybdate leads to the transformation of the tetragonal structure of La2MoO6 to a cubic fluorite-like one. The content of the cubic phase reaches 94% in the Lа1.4Cd0.6MoO5.7 sample. The unit cell parameter of fluorite-like-phase decreases with cadmium content rising. The preferred location of cadmium ions in the cubic structure was established by the Rietveld refinement method. The heterovalent substitution cadmium for lanthanide in tetragonal La2MoO6 molybdate leads to the cubic fluorite phase stabilization in a similar way as it occurs in the process of reduction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|