| 释义 |
〔hornblende〕An amphibolic mineral, CaNa(Mg,Fe)4(Al,Fe,Ti) 3Si 6O 22(OH,F) 2, commonly green or bluish green to black in color, formed in the late stages of cooling in igneous rock. 角闪石：一种闪石类矿物，化学式为CaNa(Mg,Fe)4(Al,Fe,Ti) 3Si 6O 22(OH,F) 2，通常为绿色或蓝绿色至黑色之间，形成于火成岩冷却的后期阶段 〔tophus〕A concretion of mineral salts and organic matter deposited on the surface of the teeth.牙石：牙齿表面结晶形成的盐类矿物和有机物质的混合固体 |