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Pronunciation varies by accent · noun
(mineralogy) A magnetic form of iron sulfide, Fe²⁺Fe³⁺₂S₄, analogous to magnetite, produced by microorganisms and found in lake sediments; Note: half the iron ions are ferrous and half ferric..
Use greigite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Greigite means (mineralogy) A magnetic form of iron sulfide, Fe²⁺Fe³⁺₂S₄, analogous to magnetite, produced by microorganisms and found in lake sediments; Note: half the iron ions are ferrous and half ferric..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use greigite where its definition matches the intended context.
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