Separation of lanthanides (intro)
f-Block Elements · Chemistry
Molecule viewer
Interactive 3DBall-and-stick models with true bond angles — switch molecule to compare shapes.
Controls
Drag the sliders or type a value — the simulation updates live.
Study notes
How does ion-exchange separate Nd³⁺ from Pr³⁺? Step 1: Mixture loaded on cation-exchange resin; Ln³⁺ stick to it. Step 2: A complexing agent (citrate/EDTA) washes through. Step 3: Smaller (heavier) Ln³⁺ form slightly stronger complexes → elute at different rates. Step 4: Fractions collected separately — repeated passes give 99.9%+ purity!