| 单词 |
rare-earth mineral |
| 释义 |
rare-earth mineral
rare-earth mineral[′rer ‚ərth ′min·rəl] (mineralogy) A mineral containing lanthanides and yttrium as essential constituents. The total atomic ratio of lanthanides and yttrium is greater than any other element within at least one crystallographic site. Examples are monazite, xenotime, and bastnaesite. |
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