Greenockite

Greenockite

Greenockite is a rare cadmium mineral that consists of cadmium sulfide, CdS, in crystalline form. Greenockite crystallizes in the hexagonal system. It occurs as massive encrustations and as six-sided pyramidal crystals which vary in color from a honey yellow through shades of red to brown. The Mohs hardness is 3 to 3.5 and the specific gravity is 4.5 to 5.

Greenockite occurs with other sulfide minerals such as sphalerite and galena. It is the only "ore mineral" of cadmium, most cadmium is recovered as a byproduct of zinc and lead mining.

It was first recognized in 1840 in Bishopton, Scotland, during the cutting of a tunnel for the Glasgow, Paisley and Greenock Railway. The mineral was named after the land owner Lord Greenock. It is also known from the lead-zinc districts of the central United States.

References

* [http://www.mindat.org/min-1746.html Mindat]
* [http://webmineral.com/data/Greenockite.shtml Webmineral]
* [http://mineral.galleries.com/minerals/sulfides/greenock/greenock.htm Mineral galleries]
* [http://www.hmag.gla.ac.uk/John/huntmin/greenock.htm Glasgow museum site]


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Look at other dictionaries:

  • Greenockite — Green ock*ite, n. [Named after Lord Greenock.] (Min.) Native cadmium sulphide, a mineral occurring in yellow hexagonal crystals, also as an earthy incrustation. [1913 Webster] …   The Collaborative International Dictionary of English

  • greenockite — [grēn′ək īt΄] n. [after C. M. Cathcart, Lord Greenock (1783 1859), Eng general who discovered it in 1841, + ITE1] a soft, yellowish, hexagonal mineral, CdS, an ore of cadmium; cadmium sulfide …   English World dictionary

  • greenockite — grinokitas statusas T sritis chemija apibrėžtis Mineralas. formulė CdS atitikmenys: angl. greenockite rus. гринокит …   Chemijos terminų aiškinamasis žodynas

  • greenockite — noun Etymology: Charles M. Cathcart, Lord Greenock died 1859 English soldier Date: 1844 a mineral consisting of native cadmium sulfide occurring especially in yellow translucent hexagonal crystals …   New Collegiate Dictionary

  • greenockite — /gree neuh kuyt /, n. a yellow mineral, cadmium sulfide, CdS, associated with zinc ores and used as a source of cadmium. [1840 45; named after Charles Cathcart, Lord Greenock (1807 43), Englishman who discovered it; see ITE1] * * * ▪ mineral… …   Universalium

  • greenockite — noun A rare cadmium mineral that consists of cadmium sulfide in crystalline form …   Wiktionary

  • greenockite — gree·nock·ite …   English syllables

  • greenockite — green•ock•ite [[t]ˈgri nəˌkaɪt[/t]] n. mir a yellow mineral, cadmium sulfide, Cdassociated with zinc ores • Etymology: 1840–45; after Charles Cathcart, Lord Greenock (1807–43), Englishman who discovered it; see ite I …   From formal English to slang

  • greenockite — noun ore of cadmium; a rare yellowish mineral consisting of cadmium sulphide in crystalline form • Syn: ↑cadmium sulphide • Hypernyms: ↑mineral …   Useful english dictionary

  • Greenockit — aus der Tsumeb Mine, Namibia Bildgröße 1 mm Chemische Formel 6beta; CdS Mineralklasse Sulfide, Sulfosalze Metall:Schwefel, Selen, Tellur = 1:1 II/C.13 30 (nach Strunz) 02.08 …   Deutsch Wikipedia

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