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Updated: May 15, 2026
16:11
Thermochemical Studies of Ni(II) and Zn(II) Ternary Complexes Using Ion Mobility-Mass Spectrometry
Published on: June 8, 2022
Intermediate valence behavior in the novel cage compound CeIr2Zn20
1Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PO Box 1410, 50-950 Wrocław, Poland. P.Swatek@int.pan.wroc.pl
Summary
Single crystals of cerium iridium zinc (CeIr2Zn20) exhibit intermediate valence behavior due to an unstable 4f shell. This results in metallic conductivity and moderately enhanced charge carrier mass, consistent with electronic structure calculations.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid State Chemistry
Background:
- Cerium intermetallic compounds are known for their diverse electronic properties, often linked to the behavior of the 4f electron shell.
- Understanding intermediate valence phenomena is crucial for developing novel electronic materials.
Purpose of the Study:
- To synthesize and characterize the single crystal of the cerium intermetallic compound CeIr2Zn20.
- To investigate the physical properties and electronic structure of CeIr2Zn20.
Main Methods:
- Single crystal growth using the flux method.
- X-ray diffraction for crystal structure determination.
- Magnetic, electrical transport, and thermodynamic measurements for physical property analysis.
- Local spin density approximation for electronic structure calculations.
Main Results:
- CeIr2Zn20 crystallizes in the cubic CeCr2Al20-type structure.
- The compound exhibits paramagnetic behavior and metallic electrical conductivity.
- Bulk physical data indicate intermediate valence character stemming from an unstable 4f shell.
- Charge carriers display moderate mass enhancement.
- Experimental results align with calculated electronic structure.
Conclusions:
- CeIr2Zn20 is an intermediate valence compound with an unstable 4f shell.
- The observed physical properties are consistent with its electronic structure.
- This study contributes to the understanding of cerium-based intermetallic compounds.
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