单词 | unionite |
释义 | unioniten. Mineralogy. Now rare. A form of very pure, white to yellowish-white zoisite. Unionite is a hydrated silicate of calcium and aluminium, Ca2Al3(SiO4)(Si2O7)O(OH). Crystal system: orthorhombic. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > epidote group > [noun] > zoisite zoisite1805 thulite1820 unionite1849 tanzanite1968 1849 B. Silliman in Amer. Jrnl. Sci. 8 384 Unionite..in general appearance..somewhat resembles scapolite or spodumene. 1855 D. T. Ansted et al. in Orr's Circle Sci.: Inorg. Nature 521/1 Antitomous Felspar, Soda Spodumene, Unionite. 1922 E. S. Dana & W. A. Ford Textbk. Mineral. (ed. 3) 530 Unionite is a very pure zoisite. This entry has been updated (OED Third Edition, September 2015; most recently modified version published online March 2022). < n.1849 |
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