单词 | allanite |
释义 | Word Frequency allanite(ˈæləˌnaɪt) noun a rare black or brown mineral consisting of the hydrated silicate of calcium, aluminium, iron, cerium, lanthanum, and other rare earth minerals. It occurs in granites and other igneous rocks. Formula: (Ca,Ce, La,Y)2(Al,Fe,Be,Mn,Mg)3(SiO4)3(OH) Word origin C19: named after T. Allan (1777–1833), English mineralogist |
随便看 |
英语词典包含233703条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。