sulfide
C1Technical / Scientific
Definition
Meaning
A chemical compound of sulfur with another element or group, typically a metal (e.g., iron sulfide, hydrogen sulfide).
Inorganic chemistry: any binary compound where sulfur has an oxidation state of -2; used broadly in mineralogy, electrochemistry, and materials science.
Linguistics
Semantic Notes
Strictly a chemical term. The spelling 'sulfide' is the IUPAC and standard American English form; the British spelling is 'sulphide'. Not to be confused with 'sulfite' or 'sulfate', which are different anions.
Dialectal Variation
British vs American Usage
Differences
Spelling: British 'sulphide' vs. American 'sulfide'. Pronunciation: 'ph' /f/ in British IPA, though 'sulfide' spelling is increasingly common in UK scientific publications.
Connotations
Identical scientific meaning. The 'ph' spelling can appear more traditional in a UK context.
Frequency
In American English, 'sulfide' is universal. In British English, 'sulphide' remains common, but 'sulfide' is prevalent in international journals and IUPAC-aligned texts.
Vocabulary
Collocations
Grammar
Valency Patterns
[metal] sulfidesulfide of [element]hydrogen sulfide gasVocabulary
Synonyms
Neutral
Vocabulary
Antonyms
Usage
Context Usage
Business
Rare, except in specific industries like mining ("sulfide ore processing") or chemicals.
Academic
Common in chemistry, geology, environmental science, and materials science journals.
Everyday
Virtually non-existent unless discussing the smell of rotten eggs (hydrogen sulfide).
Technical
Core term in inorganic chemistry, electrochemistry (e.g., lithium-sulfide batteries), and mineralogy.
Examples
By Part of Speech
verb
British English
- The ore was sulphided during the hydrothermal process.
- The metal tends to sulphidise under those conditions.
American English
- The ore was sulfided during the hydrothermal process.
- The metal tends to sulfide under those conditions.
adjective
British English
- Sulphide minerals are often opaque.
- A sulphide-rich deposit was discovered.
American English
- Sulfide minerals are often opaque.
- A sulfide-rich deposit was discovered.
Examples
By CEFR Level
- The smell of rotten eggs is often hydrogen sulfide.
- Some minerals, like pyrite, are sulfides.
- Copper sulfide is an important ore for extracting copper.
- Hydrogen sulfide gas is both toxic and flammable.
- The precipitation of iron sulfide in the sediment indicated anoxic conditions.
- Advanced lithium-sulfide batteries promise higher energy density.
Learning
Memory Aids
Mnemonic
Think: SULFur + IDE (like chloride, bromide) = a compound where sulfur is the negative ion.
Conceptual Metaphor
N/A (Highly technical term).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'сульфат' (sulfate) or 'сульфит' (sulfite). 'Sulfide' is 'сульфид'.
- Hydrogen sulfide (H₂S) is 'сероводород'.
Common Mistakes
- Misspelling as 'sulphide' in American contexts or 'sulfide' in traditional British contexts.
- Confusing 'sulfide' (S²⁻) with 'sulfite' (SO₃²⁻) or 'sulfate' (SO₄²⁻).
- Using it as a verb (e.g., 'The metal sulfided' is highly technical/rare; preferred: 'formed a sulfide').
Practice
Quiz
Which of the following is a correct statement about sulfides?
FAQ
Frequently Asked Questions
Sulfide (S²⁻) is a sulfur anion with no oxygen. Sulphate/Sulfate (SO₄²⁻) is a polyatomic anion containing sulfur and four oxygen atoms. They are chemically distinct.
Yes. Hydrogen sulfide (H₂S) is a highly toxic, flammable gas with a characteristic rotten egg smell at low concentrations. It can be deadly at high concentrations.
Use 'sulfide' for American English and international scientific writing (IUPAC). Use 'sulphide' for traditional British English contexts, though 'sulfide' is increasingly accepted.
In highly technical contexts (e.g., metallurgy, corrosion science), 'to sulfide' (US) or 'to sulphidise/sulfide' (UK) means to convert into or treat with a sulfide. It is very rare in general usage.