uranium hexafluoride
C2Technical / Scientific
Definition
Meaning
A chemical compound consisting of one uranium atom and six fluorine atoms (UF₆).
A volatile solid used in the nuclear fuel cycle to enrich uranium-235 via gaseous diffusion or centrifugation, due to its property of becoming gaseous at relatively low temperatures.
Linguistics
Semantic Notes
Exclusively refers to the specific compound UF₆. The term is highly domain-specific to nuclear chemistry, physics, and engineering. Often abbreviated as 'UF₆' in technical writing.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. Pronunciation differences follow general BrE/AmE patterns for 'uranium' and 'hexafluoride'.
Connotations
Identical strong association with nuclear technology, enrichment, and proliferation concerns.
Frequency
Equally low-frequency and specialized in both dialects, used only within relevant technical fields.
Vocabulary
Collocations
Grammar
Valency Patterns
[Uranium hexafluoride] is used to [VERB]...The [PROCESS] of [uranium hexafluoride][VERB] uranium hexafluoride into...Vocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Rare, except in reports or contracts related to the nuclear energy or nuclear fuel supply industry.
Academic
Common in chemistry, physics, and nuclear engineering textbooks, research papers, and lectures.
Everyday
Extremely rare. Would only appear in news reports about nuclear proliferation or energy.
Technical
The primary register. Used in specifications, safety protocols, process descriptions, and technical manuals within the nuclear fuel cycle.
Examples
By Part of Speech
adjective
British English
- The uranium hexafluoride conversion line was shut down.
- UF₆ is the uranium hexafluoride formula.
American English
- The uranium hexafluoride enrichment process is complex.
- A uranium hexafluoride cylinder requires special handling.
Examples
By CEFR Level
- Uranium hexafluoride is used in nuclear power.
- The nuclear process requires converting uranium oxide into uranium hexafluoride gas.
- Uranium hexafluoride is highly corrosive and must be handled with care.
- Gaseous diffusion plants separate the lighter U-235 isotopes from U-238 in uranium hexafluoride.
- The volatility of uranium hexafluoride at 56°C makes it uniquely suited for centrifugal enrichment.
Learning
Memory Aids
Mnemonic
Remember: U (like Uranium) + F₆ (six Fluorine atoms) = UF₆. 'Hexa' means six, like a hexagon has six sides.
Conceptual Metaphor
Often metaphorically referred to as the 'workhorse gas' of uranium enrichment.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Прямой перевод 'гексафторид урана' является точным и стандартным. Ловушки нет.
- Не переводите как 'урановый гексафторид' (менее стандартная форма).
Common Mistakes
- Misspelling as 'uranium hexaflouride' (incorrect spelling of 'fluoride').
- Incorrectly calling it 'uranium fluoride' (which is a different class of compounds).
- Mispronouncing 'hexafluoride' with stress on 'hex' (correct stress: 'hek-sə-FLOOR-eyed').
Practice
Quiz
What is the primary industrial use of uranium hexafluoride (UF₆)?
FAQ
Frequently Asked Questions
Yes, but its radioactivity is primarily due to the uranium atom. Its main hazards are chemical (it forms corrosive hydrofluoric acid upon reaction with water) as well as radiological.
UF₆ sublimes (transitions from solid directly to gas) at 56.5°C at atmospheric pressure. This gaseous state is essential for the physical separation processes (like centrifugation) used in isotopic enrichment.
No, UF₆ gas is colourless. In its solid form, it is a white crystalline substance.
Yes. The prefix 'hexa-' comes from Greek, meaning 'six', indicating the six fluorine atoms bonded to the single uranium atom in the compound (UF₆).