ferrous sulfide
C2Technical/Scientific
Definition
Meaning
A black chemical compound composed of iron and sulfur with the formula FeS.
A naturally occurring mineral (pyrite or pyrrhotite) or an industrially produced compound used in steelmaking, pigment production, and battery manufacturing.
Linguistics
Semantic Notes
The term is compound-specific; 'ferrous' indicates iron in the +2 oxidation state. Often confused with pyrite (FeS2), which is iron disulfide.
Dialectal Variation
British vs American Usage
Differences
Spelling: 'sulfide' is standard in American English, 'sulphide' is standard in British English. The term 'ferrous' is used identically.
Connotations
Identical technical connotations. In British geological contexts, 'iron sulphide' may be a more common umbrella term.
Frequency
Extremely low frequency in general language, appearing almost exclusively in scientific, industrial, and educational texts in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
ferrous sulfide [verb] (e.g., forms, reacts, precipitates)[process] produces ferrous sulfideVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “No common idioms”
Usage
Context Usage
Business
Rare, except in mining, metallurgy, or chemical industry reports.
Academic
Standard in chemistry, geology, materials science, and environmental engineering texts and lectures.
Everyday
Virtually non-existent.
Technical
The primary domain of use; precise term in chemical equations, process descriptions, and material specifications.
Examples
By Part of Speech
adjective
British English
- The ferrous sulphide content was analysed.
- A ferrous sulphide deposit was identified.
American English
- The ferrous sulfide content was analyzed.
- A ferrous sulfide deposit was identified.
Examples
By CEFR Level
- Ferrous sulfide is a black solid.
- When iron reacts with sulfur, it forms ferrous sulfide.
- The mineral pyrrhotite is a form of ferrous sulfide.
- In the laboratory, ferrous sulfide can be prepared by direct combination of the elements at high temperature.
- The presence of ferrous sulfide in the sediment indicated anoxic conditions during its formation.
Learning
Memory Aids
Mnemonic
FERROUS SULFIDE: FERROus (iron) + SULFide (sulfur) = Iron + Sulfur compound.
Conceptual Metaphor
N/A (Highly technical term).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Direct translation from Russian 'сернистое железо' or 'сульфид железа(II)' is accurate but may not specify the oxidation state. Ensure context clarifies FeS vs FeS2.
Common Mistakes
- Confusing it with pyrite (fool's gold, FeS2).
- Misspelling 'sulfide/sulphide'.
- Mispronouncing 'ferrous' as /ˈferəs/ instead of /ˈferəs/.
- Using 'ferrous sulfide' to describe the smell of rotten eggs (hydrogen sulfide is the smelly gas).
Practice
Quiz
What is the primary context for using the term 'ferrous sulfide'?
FAQ
Frequently Asked Questions
No, fool's gold is usually pyrite, which is iron disulfide (FeS2). Ferrous sulfide is FeS.
Impure or reacting ferrous sulfide can produce small amounts of hydrogen sulfide gas (H2S), which has the characteristic rotten egg smell. The pure compound itself is not notably smelly.
Yes, it occurs as the minerals troilite and pyrrhotite, though pyrrhotite is non-stoichiometric (Fe(1-x)S).
It is used as a precursor to hydrogen sulfide gas, in pigment production, and historically in the 'finery forge' process in steelmaking.