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Updated: Jun 12, 2025
11:10
Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
11.9K
ZnVO3: an ilmenite-type vanadium oxide hosting robust V-V dimers
Hajime Yamamoto1, Takumi Nishikubo2,3, Shintaro Kobayashi4
1Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577, Japan. hajime.yamamoto.a2@tohoku.ac.jp.
Dalton Transactions (Cambridge, England : 2003)
|September 26, 2024
Summary
Researchers synthesized a new ilmenite-type compound, ZnVO3, revealing stable V-V and Zn-Zn dimers. This discovery offers insights into controlling cation-dimer strength through crystal structure distortions.
Area of Science:
- Materials Science
- Solid State Chemistry
- Crystallography
Background:
- Ilmenite-type vanadium oxides are known for unique cation-dimerization.
- Understanding these behaviors is key to developing novel materials.
Purpose of the Study:
- To synthesize and characterize a novel ilmenite-type compound, ZnVO3.
- To investigate the cation-dimerization behavior in this new compound.
Main Methods:
- High-pressure and high-temperature synthesis (10 GPa, 1573 K).
- X-ray crystallography for structural determination (triclinic P1̄ space group).
- Magnetic susceptibility measurements.
Main Results:
- Successfully synthesized polycrystalline ZnVO3.
- Observed V-V and Zn-Zn dimers arranged in a ladder-like pattern.
- V-V dimer stability up to 625 K, exceeding other ilmenite vanadates.
- Magnetic data confirmed direct V-V bond formation.
- Zn2+ off-centering due to covalency and sp3 nature drives Zn-Zn dimer-like displacement.
- Cooperative distortions enhance V-V dimer stability.
Conclusions:
- ZnVO3 exhibits unique and stable cation-dimerization.
- Crystal structure distortions can be used to control cation-dimer strength.
- Provides a new avenue for designing functional materials.
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