opaciten.

Brit.

/ˈəʊpəsʌɪt/, U.S.

/ˈoʊpəˌsaɪt/

Origin: A borrowing from German. Etymon: German Opacit.

Etymology: < German Opacit (H. Vogelsang 1872, in Zeitschr. der Deutsch. Geol. Ges. 24 530) < classical Latin opācus opaque adj. + German -it -ite suffix¹.

Geology.

Microscopic dark grains and scales occurring in the groundmass of many igneous rocks, which are too small to be readily identified by optical means and are sometimes attributed to iron oxides or carbon.

ΘΚΠ

the world > the earth > minerals > types of mineral > other miscellaneous minerals > [noun]

adamanteOE

adamantinec1225

adamant stonea1387

chrysocoll1590

chrysocolla1600

aloe1601

Scythian stone1608

diaspore1802

sideroclepte1814

allagite1823

spherulite1823

aluminide1826

rhodalite1836

aikinite1843

alvite1855

xanthitane1856

belonite1865

aenigmatite1868

opacite1875

viridite1879

neocyanite1882

sideronatrite1882

wittite1924

niggliite1936

anthonyite1963

perryite1965

KREEP1971

1875 E. S. Dana in J. D. Dana Syst. Mineral. (new ed.) App. ii. 42 Opacite, a name proposed by Vogelsang for the black opaque scales or grains..which cannot be identified with magnetite, menaccanite, or any other mineral.

1900 Proc. Royal Soc. 67 477 The larger grains prove to be generally diallage..with a close pinacoidal cleavage, often made more distinct by the deposit of a little opacite or ferrite.

1972 Gloss. Geol. (Amer. Geol. Inst.) 494/2 Opacite is generally supposed to consist chiefly of magnetite dust.

1990 Jrnl. Petrol. 31 822 Amphiboles with a thin opacite rim show rounded and slightly embayed outlines.

This entry has been updated (OED Third Edition, June 2004; most recently modified version published online March 2022).

单词	opacite
释义	opaciten. Brit. /ˈəʊpəsʌɪt/, U.S. /ˈoʊpəˌsaɪt/ Origin: A borrowing from German. Etymon: German Opacit. Etymology: < German Opacit (H. Vogelsang 1872, in Zeitschr. der Deutsch. Geol. Ges. 24 530) < classical Latin opācus opaque adj. + German -it -ite suffix¹. Geology. Microscopic dark grains and scales occurring in the groundmass of many igneous rocks, which are too small to be readily identified by optical means and are sometimes attributed to iron oxides or carbon. ΘΚΠ the world > the earth > minerals > types of mineral > other miscellaneous minerals > [noun] adamanteOE adamantinec1225 adamant stonea1387 chrysocoll1590 chrysocolla1600 aloe1601 Scythian stone1608 diaspore1802 sideroclepte1814 allagite1823 spherulite1823 aluminide1826 rhodalite1836 aikinite1843 alvite1855 xanthitane1856 belonite1865 aenigmatite1868 opacite1875 viridite1879 neocyanite1882 sideronatrite1882 wittite1924 niggliite1936 anthonyite1963 perryite1965 KREEP1971 1875 E. S. Dana in J. D. Dana Syst. Mineral. (new ed.) App. ii. 42 Opacite, a name proposed by Vogelsang for the black opaque scales or grains..which cannot be identified with magnetite, menaccanite, or any other mineral. 1900 Proc. Royal Soc. 67 477 The larger grains prove to be generally diallage..with a close pinacoidal cleavage, often made more distinct by the deposit of a little opacite or ferrite. 1972 Gloss. Geol. (Amer. Geol. Inst.) 494/2 Opacite is generally supposed to consist chiefly of magnetite dust. 1990 Jrnl. Petrol. 31 822 Amphiboles with a thin opacite rim show rounded and slightly embayed outlines. This entry has been updated (OED Third Edition, June 2004; most recently modified version published online March 2022). < n.1875
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