| 释义 |
thorian, a. Min.|ˈθɔərɪən|
[f. thorium + -ian 2.]
Of a mineral: having a (small) proportion of a constituent element replaced by thorium.
1930Amer. Mineralogist XV. 572 Thorian. 1974A. R. Philpotts in H. Sørensen Alkaline Rocks iv. vi. 303/1 Hydrothermal activity along fractures, producing biotite and enrichment of the carbonatite in thorian pyrochlore. |