Europium
The phosphor element that made color television — and anti-counterfeit euros — possible.
Europium is the most reactive rare earth and historically one of the most valuable: its red (Eu³⁺) and blue (Eu²⁺) phosphors made color television and later energy-efficient fluorescent lighting possible. The shift from fluorescent tubes to LEDs collapsed europium demand and prices from their 2011 peak, making it a cautionary tale about substitution risk in critical minerals. It remains essential in LED phosphors, medical imaging screens, and the fluorescent anti-counterfeiting inks in euro banknotes.
Uses
- Europium compounds provide phosphors for displays and lighting, including red emission.
- Luminescent europium compounds are used in anti-counterfeiting features on euro banknotes.
- Europium absorbs neutrons and has nuclear control applications.
Key Facts
- Atomic number
- 63
- Flagship use
- Phosphors
- Market history
- Price collapse post-2011
- Lesson
- Substitution/demand risk
New to drill results? Read our guide: How to read assay results →
Isotope reference
Isotopes & Nuclear Properties
Europium has two natural isotopes. NUBASE2020 records very slow alpha decay of Eu-151; Eu-153 is listed as stable. Both should not be described simply as stable.
| Isotope | Natural abundance | Half-life / status |
|---|---|---|
| ¹⁵¹Eu | 47.81(6)% | 4.6(12) × 10¹⁸ years |
| ¹⁵³Eu | 52.19(6)% | Stable |
CIAAW amount-fraction uncertainties are shown in parentheses where reported. “Stable” means no radioactive half-life is assigned in this table.
Abundances are CIAAW amount fractions converted to percentages for normal terrestrial material; parentheses give uncertainty in the final digits. “Stable” means no decay is established in the cited evaluation, not that all decay modes are impossible. Natural abundance and nuclear stability do not establish chemical safety; enriched or activated material needs separate assessment.