greenockite

American  

[gree-nuh-kahyt] / ˈgri nəˌkaɪt /

noun

1. a yellow mineral, cadmium sulfide, CdS, associated with zinc ores and used as a source of cadmium.

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greenockite British  

/ ˈɡriːnəˌkaɪt /

noun

1. a rare yellowish mineral consisting of cadmium sulphide in hexagonal crystalline form: the only ore of cadmium. Formula: CdS

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Etymology

Origin of greenockite

1840–45; named after Charles Cathcart, Lord Greenock (1807–43), Englishman who discovered it; see -ite ¹

Example Sentences

Previous to the recent discovery in Sardinia of cadmium oxide as small octahedral crystals, greenockite was the only known mineral containing cadmium as an essential constituent.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5 "Greek Law" to "Ground-Squirrel" by Various

Cadmium occurs in nature as cadmium sulphide in greenockite, CdS, which is very rare.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius

It occurs in combination with sulphur in greenockite, and in some ores of zinc.

From A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations by Anonymous

The zinc oxide minerals in the surficial zone also are sometimes colored yellow by small amounts of greenockite.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)

Sphalerite almost always contains a little cadmium, probably as the sulphide; and in zinc deposits crystals of sphalerite in cavities are frequently covered with a greenish-yellow film or coating of greenockite.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)