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单词
polymignyte
释义
polymignyte
polymignyte
[
‚päl·i′mig‚nīt
]
(mineralogy)
(Ca,Fe,Y,Zr,Th)(Nb,Ti,Ta)O
4
A black mineral composed of niobate, titanate, and tantalate of cerium-group metals, with calcium and iron. Also spelled polymignite.
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更新时间:2025/7/28 4:47:28