| 单词 | chondrules |
| 释义 | chondruleschondrules(kon -droolz) Near-spherical bodies composed chiefly of silicates, with sizes between 0.2 mm and 4 mm, found embedded in chondrites. They are usually aggregates of olivine, (Mg,Fe)2 SiO4, and pyroxene (Mg,Fe)SiO3. They may also be single crystals, wholly glass, or crystal and glass, in a wide range of proportions. They appear to have been free fluid drops made spherical by surface tension and then solidified and crystallized. There is a possibility that these silicate drops were produced by lightning discharges in the dusty primitive solar nebula or that they are crystallized droplets of impact melt produced when two asteroids collided. Chondrulelike bodies have been found in lunar soils. |
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