High-Temperature Isostructural Phase Transition in Ce2(MoO4)3: A Rare Phenomenon Investigated through X‑ray Diffraction and Raman Scattering
Zeyna dos Santos Viegas, Alan Silva de Menezes, Cleânio Luz-Lima, Paulo de Tarso Cavalcante Freire, Clenilton Costa Santos, João Victor Barbosa Moura
TL;DR
This paper investigates a rare high-temperature phase transition in a cerium molybdate compound using X-ray and Raman techniques.
Contribution
The study identifies a rare isostructural phase transition in Ce2(MoO4)3 at high temperatures using in situ XRD and Raman spectroscopy.
Findings
Ce2(MoO4)3 shows a stable low-temperature phase up to 303 K.
An isostructural phase transition is observed at temperatures above 848 K.
The phase transition is linked to anomalies in lattice parameters and Raman spectra.
Abstract
The rare-earth compound cerium(III) molybdate (Ce2(MoO4)3) has gained attention due to its diverse industrial applications, such as photocatalysis, corrosion inhibition, self-repair of protective layers, as well as antiviral and antibacterial properties. However, its response to extreme temperature conditions remains insufficiently explored. This study employs ambient powder X-ray diffraction (PXRD), UV–vis diffuse reflectance spectroscopy, scanning electron microscopy (SEM), and Raman spectroscopy techniques to confirm the successful hydrothermal synthesis of a crystalline sample of the Ce2(MoO4)3 compound. Subsequently, in situ temperature-dependent (13–973 K) XRD and Raman scattering (293–998 K) studies were conducted. Rietveld analysis of diffraction patterns reveals a stable low-temperature phase (13–303 K) and anomalies in the high-temperature evolution (T > 583 K) of lattice…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24
Figure 25
Figure 26Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsCatalysis and Oxidation Reactions · Transition Metal Oxide Nanomaterials · Thermal Expansion and Ionic Conductivity