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单词 fergusonite
释义 fer·gu·son·ite
\ˈfərgəsəˌnīt\ noun
(-s)
Etymology: Robert Ferguson died 1865 Scottish physician + English -ite
: a brownish black mineral (Y,Er,Ce,Fe,)(Nb,Ta,Ti)O4 consisting essentially of an oxide of yttrium, erbium, niobium, and tantalum with other metals often including uranium and isomorphous with formanite (hardness 5.5-6)
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更新时间:2024/11/11 13:34:32