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单词 britholite
释义

britholite

/ˈbrɪθəlʌɪt/
Mineralogy
noun
Any of a group of minerals related to apatite, containing rare-earth elements (especially cerium) and typically occurring as pale yellow to dark brown or black masses of prismatic crystals. Now frequently with a suffix indicating the predominant rare-earth element.
  • The earliest identified of these minerals is britholite-(Ce), a silicate and phosphate of cerium and calcium, (Ce, Ca)5(SiO4, PO4)3(OH, F). Crystal system: hexagonal..

Origin

Late 19th century. From ancient Greek βρῖθος weight (from βρίθειν to be heavy, of uncertain origin, perhaps ultimately from the same Indo-European base as Early Irish bríg strength, power) + -o- + -lite.

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更新时间:2024/9/20 12:17:44