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Pronunciation varies by accent · noun
(mineralogy) A triclinic brown mineral containing fluorine, hydrogen, iron, manganese, niobium, oxygen, potassium, silicon, sodium, and titanium..
Use niobophyllite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Niobophyllite means (mineralogy) A triclinic brown mineral containing fluorine, hydrogen, iron, manganese, niobium, oxygen, potassium, silicon, sodium, and titanium..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use niobophyllite where its definition matches the intended context.
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