| 单词 |
ureilite |
| 释义 |
ureilite Geol.|ˈjʊərɪɪlaɪt|
[ad. Russ. ureĭlit (Erofeev & Lachinov 1888, in Zhurnal Russ. fiziko-khim. Obshchestva pri Imper. St. Petersburgsk. Univ. XX. 213), f. the name of Novo-Ureĭ, a village near Penza, in the vicinity of which a meteorite belonging to this class fell.]
Any of a group of calcium-poor achondrite meteorites that consist mainly of olivine and pigeonite.
[1889Jrnl. Chem. Soc. LVI. 225 The authors find, after comparison with known classes of aerolites, that the meteorite described above differs from all of them in many points, and propose to name this form ureïlithe.] 1916Mineral Mag. XVIII. 38 The ureilites consist of a coarsely crystalline aggregate of olivine and monoclinic pyroxene cemented together by a film of nickel-iron and carbonaceous matter. 1962B. Mason Meteorites 111 The ureilites form a unique group of three meteorites, quite distinct from all other achondrites. 1971I. G. Gass et al. Understanding Earth viii. 116/1 The presence of diamond in the small group of ureilites appears to be due to extraterrestrial shock effects. |
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