Also found in: Dictionary, Thesaurus, Wikipedia.


FeS A meteorite mineral crystallizing in the hexagonal system; a variety of pyrrhotite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(named for the 18th-century Italian scientist D. Troili, who described a meteorite containing the mineral), a mineral Of the sulfide group, FeS.

Troilite crystallizes in a hexagonal system, and its crystal structure resembles that of hexagonal pyrrhotite. It forms brownish yellow rounded segregations with a metallic luster; less fre quently it occurs as poorly formed crystals. In cryptocrystalline aggregates it is black. Its hardness on Mohs’ scale is 4, and its density is 4,600–4,840 kg/m3. Troilite is primarily a meteorite mineral; terrestrial troilite is rare, occurring as inclusions in native iron and in copper ores and chromites associated with ultra-basic rocks.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
He also found troilite (5) and another mineral, schreibersite, a phosphide of iron and nickel found in meteorites.
(5) Troilite: a mineral, native ferrous sulphide, FeS, that occurs in many metallic meteorites.
The values are expressed in per mil, related to the standard V-CDT (Vienna Canyon Diablo Troilite).
Troilite vaporizes at 407[degrees] Celsius (764[degrees]F), a temperature reached once Comet McNaught had closed to within about 30 million kilometers (20 million miles) of the Sun.
Other research has shown that troilite is probably the most abundant sulfide in comets.
Troilite occurs as bronze-colored grains to 1 mm included in aggregates of bartonite and chlorbartonite.
%) of bartonite (1), chlorbartonite (2), troilite (3), sphalerite (4), wurtzite (5) and lollingite (6) from the Palitra.
Results are presented as [[delta].sup.34]S relative to the Vienna Canyon Diablo Troilite (VCDT) standard.
Occurrence: Associated minerals are: niningerite, enstatite, kamacite and troilite.
The standard used for sulfur isotope ratios is the mineral troilite from the Canyon Diablo meteorite, which has a very consistent [S.sup.34]/[S.sup.32] ratio of 0.044994.
Occurrence: Associated minerals are: enstatite, ferroan alabandite, troilite and daubreelite.
Occurrence: Associated minerals are: kamacite, taenite, troilite and forsterite.