Molybdenite
Molybdenum disulphide MoS₂, an important molybdenum ore with flaky crystals.
Language and route: English derived from Greek μόλυβδος (mólybdos), lead, through learned Latin molybdaena and later mineralogical coinage. English derived from Greek μόλυβδος (mólybdos), lead, through learned Latin molybdaena and later mineralogical coinage
Literal gloss: lead-like mineral
The name and its history
Inherited molybdaena; Wallerius and Scheele in modern differentiation · 1747 differentiated usage; 1778–81 chemical clarification
- What does the word literally mean?
- Immediate linguistic route: English derived from Greek μόλυβδος (mólybdos), lead, through learned Latin molybdaena and later mineralogical coinage. Earliest relevant language form supplied here: μόλυβδος (mólybdos), conventionally glossed ‘lead-like mineral’. The literal sense is distinct from what the early name was used to classify.
- What did the original author mean?
- For centuries molybdaena was applied to dark lead-like substances including graphite and ores. Wallerius’s classification and Scheele’s chemistry helped differentiate modern molybdenite from graphite.
- Why was the name needed?
- Early names based on grey lustre and ability to leave marks failed to distinguish chemically unrelated substances.
- What evidence supported the original concept?
- Wet chemistry established the difference between soft carbon graphite and molybdenum-bearing mineral, despite their similar hand-specimen appearance.
- How has geology changed the concept?
- Modern molybdenite is MoS₂, with properties unlike lead or graphite, and may occur in porphyry copper–molybdenum systems.
Further historical context
For centuries molybdaena was applied to dark lead-like substances including graphite and ores. Wallerius’s classification and Scheele’s chemistry helped differentiate modern molybdenite from graphite.
Early names based on grey lustre and ability to leave marks failed to distinguish chemically unrelated substances.
Wet chemistry established the difference between soft carbon graphite and molybdenum-bearing mineral, despite their similar hand-specimen appearance.
Modern molybdenite is MoS₂, with properties unlike lead or graphite, and may occur in porphyry copper–molybdenum systems.
Editorial qualification
The cited historical nomenclatural account is secondary; earliest printed naming and exact original wording have not been independently collated.
Related names
Sources
- Mindat — Molybdenite — Modern mineral identity and secondary mineral-naming history; not independently checked original naming page
- BGS — metalliferous mineral economy of south-west England — Historical mining and ore context; does not authenticate etymology or a first coinage
- Historical/source context — NAMING — Additional specific historical or classificatory context; see evidence qualifications