Tanabe-Sugano · d³ term energies vs ligand field
unseel.com · E/B vertical · Δ₀/B horizontal · one chart, every d³ ion
Δ₀/B 0
Racah B — cm⁻¹
State
⁴A₂g ground term (baseline)
⁴T₂g / ⁴T₁g excited terms
Spin-forbidden ²Eg line
Cr³⁺ read-off · Δ₀ & B
Unseel.com · Tanabe-Sugano Diagrams