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Pronunciation varies by accent · noun
(mineralogy) A scandium yttrium silicate mineral, greyish-green, black or grey in colour, the primary source of scandium..
Use thortveitite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Thortveitite means (mineralogy) A scandium yttrium silicate mineral, greyish-green, black or grey in colour, the primary source of scandium..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use thortveitite where its definition matches the intended context.
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