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单词 unionite
释义

unioniten.

Brit. /ˈjuːnɪənʌɪt/, U.S. /ˈjunjəˌnaɪt/
Origin: From a proper name, combined with an English element. Etymons: proper name Unionville , -ite suffix1.
Etymology: < union- (in the name of Unionville, Pennsylvania, where the mineral was found in 1849: see quot. 1849) + -ite suffix1.
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.
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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).
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n.1849
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