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单词
columbite
释义
WordReference Random House Unabridged Dictionary of American English © 2024
co•lum•bite
(kə lum
′
bīt),
USA pronunciation
n.
Mineralogy
a black, crystalline mineral, iron niobate, (Fe, Mn)Nb
2
O
6
, the principal ore of niobium, an end member of a series of solid solutions in which manganese and tantalum combine to form tantalite.
columb
(
ium
) + -
ite
1
1795–1805
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