Uranium Hexafluoride
Covered in 1 MetalsCost.com News Intelligence article, most recently on August 27, 2026.
Overview
Uranium hexafluoride, UF6, is the chemical form uranium takes for enrichment — the step that raises the concentration of fissile U-235 before nuclear fuel fabrication. It's produced at conversion plants that dissolve yellowcake concentrate, purify and reduce it to uranium dioxide, then react it with hydrogen fluoride and fluorine gas to form UF6 gas, which is cooled and drained as a liquid into cylinders where it solidifies over several days. UF6 is uniquely convenient for this purpose because fluorine has essentially one naturally occurring isotope, so all the mass difference between UF6 molecules comes from the uranium itself.
Handling and Transport
Because UF6 reacts violently with atmospheric moisture to form corrosive hydrofluoric acid, it's always transported and stored inside sealed, heavy steel cylinders as a solid, never as a bare liquid or gas. Standard transport cylinders (such as the 14-tonne Type 48Y) are heated to convert the solid to liquid for filling or feeding into enrichment cascades, then allowed to resolidify for onward shipment.
Sources
- UF6 production and handling process — Conversion and Deconversion (2024)
