Fr
Francium
Z = 87 · Alkali Metal · 223.0 u
Nuclear Engineering Significance
All isotopes are radioactive; longest-lived is Fr-223 (t₁/₂ = 22 min). Not significant in reactor engineering.
Basic properties
- Atomic number (Z)
- 87
- Standard atomic mass
- 223.0 u
- Category
- Alkali Metal
Isotopes & cross-section data
No nuclide data for this element in the reference database.
The NRDP database focuses on nuclides relevant to reactor physics (fuels, moderators, structural materials, fission products, etc.). For full isotope data, see NNDC NuDat 3 or IAEA Nuclear Data Services.