请输入您要查询的英文单词:

 

单词 pyrrhotite
释义

pyrrhotiten.

Brit. /ˈpɪrətʌɪt/, U.S. /ˈpɪrəˌtaɪt/
Origin: A variant or alteration of another lexical item. Etymon: pyrrhotine n.
Etymology: Alteration (with suffix substitution: see -ite suffix1) of pyrrhotine n.
Mineralogy.
A weakly magnetic iron sulphide mineral of a bronze or brown colour, common esp. as a minor constituent of basic igneous rocks, often in massive or granular aggregates. Also called magnetic pyrites.Pyrrhotite is a form of native iron sulphide, with an approximate formula of FeS, but with an atomic lattice deficient in iron atoms (except in the non-magnetic, meteoritic form called troilite), and varying in crystal symmetry from the hexagonal to the monoclinic system as the local proportion of iron decreases.
ΚΠ
1868 J. D. Dana Syst. Mineral. (ed. 5) 59 The niccoliferous pyrrhotite is the ore that affords the most of the nickel of commerce.
1900 in Daily News 25 July 2/1 The first cross-cut which had entered a body of solid pyrrhotite 11ft., was continued until it had passed through the vein, here 27ft. 5in. wide.
1924 A. J. Allmand & H. J. T. Ellingham Princ. Appl. Electrochem. (ed. 2) xxii. 536 From sulphur-rich ores, magnetite and roasted pyrrhotite, a pig-iron very low in sulphur was readily obtained.
1957 H. S. Zim & P. R. Shaffer Rocks & Minerals 41 Pyrrhotite..varies in composition but always contains an excess of sulfur.
1993 Jrnl. Petrol. 34 1059 Rising CO2 fluid may react with pyrrhotite and water, leading to abiogenic precipitation of hydrocarbons.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).
<
n.1868
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。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2025/1/24 13:25:12