| 单词 | polycrase |
| 释义 | polycrase [`päl·i´krās] MINERALOGY (Y,Ca,Ce,U,Th)(Ti,Cb,Ta)2O6 Black mineral composed of titanate, columbate, and tantalate of yttrium-group metals; it is isomorphous with euxenite and occurs in granite pegmatites. |
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