| 释义 |
ber·trand·ite
\ˈbər.trənˌdīt\ noun
(-s)
Etymology: French, from E. Bertrand, 19th century Frenchman who first described it + French -ite
: a mineral Be4Si2O7(OH)2 consisting of a beryllium silicate occurring in hard colorless or pale-yellow prismatic crystals (hardness 6-7, sp. gr 2.59-2.60) |