单词 | taaffeite |
释义 | taaffeiten. Mineralogy. A mauve gemstone similar to spinel, having the composition BeMgAl4O8 and a hexagonal crystal structure. ΘΚΠ society > occupation and work > materials > raw material > gem or precious stone > spinel > [noun] balas1414 spinel1528 spinelle1555 espinel?1590 balas-ruby1596 rubicelle1653 spinel ruby1668 ruby spinel1796 spinelle ruby1802 sapphirine1883 taaffeite1951 the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > spinel group AB2 O4 > others picotite1814 franklinite1820 hausmannite1831 hercynite1849 jacobsite1869 hetaerolite1877 trippkeite1881 sapphirine1883 water-spinel1883 manganomagnetite1890 chrome-spinel1892 magnesiochromite1892 magnochromite1892 picrochromite1920 trevorite1921 ulvöspinel1947 taaffeite1951 nickel spinel1961 1951 B. W. Anderson in Gemmologist XX. 76/2 One of the ‘spinels’ gave a rather high refractive index reading and seemed to show double refraction... The second ‘Taaffeite’ was found! 1951 B. W. Anderson & Claringbull in Mineral. Mag. XXIX. 765 The new mineral..has been named taaffeite in honour of its discoverer. 1967 Rocks & Minerals XLII. 803/1 The world's fourth known cut taaffeite was discovered in August of this year. 1974 Jrnl. Gemmology 14 104 The discovery of the new gem mineral Taaffeite reads like a gemmological fairy tale. This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018). < n.1951 |
随便看 |
|
英语词典包含1132095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。