What question did this study set out to answer?

The aim is to derive crystal field parameters for lanthanide ions, specifically the f1 case, using a new theoretical method.

Ab initio derivation of the crystal field parameters for lanthanide ions: The f1 case

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Derives crystal field parameters in lanthanide ions, suggesting a novel extraction method for luminescence applications.

The aim is to derive crystal field parameters for lanthanide ions, specifically the f1 case, using a new theoretical method.
Developed a novel theoretical approach to determine crystal field parameters.
Used the simplest case of CeIII 4f1 ion for practical demonstration.
Accounted for the full |J, MJ⟩ space of an ion configuration with L = 3 and S = 1/2.
Compared derived values to those from ab initio ligand field theory.
A unique set of crystal field parameters was identified for the splitting and mixing of J manifolds.
Demonstrated no influence of spin-orbit coupling on crystal field parameter values.
Parameter extraction yielded results comparable to existing ligand field theory.

Sergentu et al. (2026) studied this question.

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