| 单词 | bertrandite |
| 释义 | bertrandite /berr"treuhn duyt'/, n. a mineral, hydrous beryllium silicate, Be4Si2O7(OH)2, colorless or pale yellow, with a vitreous luster, occurring as tabular or prismatic crystals in pegmatites and hydrothermal veins. [1885-90; < F, after E. Bertrand, French mineralogist, who first described it; see -ITE1] |
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