Dictionary » P » Pyrite



(Science: chemistry) A name given to a number of common sulphur-containing metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish colour.

The term was originally applied to the mineral pyrite, or iron pyrites, in allusion to its giving sparks when struck with steel. Arsenical pyrites, arsenopyrite. Auriferous pyrites. See Auriferous. Capillary pyrites, millerite. Common pyrites, isometric iron disulphide; pyrite. Hair pyrites, millerite. Iron pyrites. Magnetic pyrites, pyrrhotite. Tin pyrites, stannite. White iron pyrites, orthorhombic iron disulphide; marcasite.

This includes cockscomb pyrites (a variety of marcasite, named in allusion to its form), spear pyrites, etc. Yellow, or copper, pyrites, the sulphide of copper and iron; chalcopyrite.

Origin: L, fr. Gr, fr. Fire. See Pyre.

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Re: Theories - Origin of Life

... continents? This could not have occurred by direct oxidative weathering because that is contradicted by the persistence of detrital uraninite and pyrite in Archean sediments. Science, Kasting, Vol. 293, 3 August 2001, “The Rise of Atmospheric Oxygen”, page 819 5) How did the genetic code evolve? ...

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by scottie
Wed Oct 05, 2011 10:11 pm
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 563
Views: 1128259

Acidithiobacillus ferrooxidans vs Thiobacillus ferroxidans

... i have been having trouble in differentiating the two. Are they one and the same or not? references say that the former increases the rate of pyrite oxidation causing lakes to be come acidic. While other resources say its the latter. Maybe they are the same? but if they are the same, how come ...

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by abstemious_entity
Fri Sep 01, 2006 10:31 pm
Forum: Microbiology
Topic: Acidithiobacillus ferrooxidans vs Thiobacillus ferroxidans
Replies: 3
Views: 2851

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