Information om | Engelska ordet TROILITE

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• This object is classified as a rare T-type asteroid, with parts of the spectrum displaying properties similar to the mineral troilite and to carbonaceous chondrite.
• Ataxites are composed mainly of meteoric iron, a native metal found in meteorites that consists of the mineral taenite with minor amounts of plessite, troilite, and microscopic lamellae of kamacite.
• As troilite lacks the iron deficiency which gives pyrrhotite its characteristic magnetism, troilite is non-magnetic.
• Minor constituents are schreibersite, troilite, chromite, pyroxenes, and phosphates (whitlockite, stanfieldite, farringtonite, and merrillite).
• The most abundant minerals are olivine and hypersthene (an orthopyroxene), as well as iron–nickel and troilite.
• Other minerals include Fe–Ni, troilite (FeS), feldspar or feldspathic glass, chromite, and phosphates.
• Examples of the acapulcoite, whose mineral composition is primarily olivine, orthopyroxene, plagioclase, meteoric iron, and troilite, would be found later in 86 other specimens whose fall to Earth was not observed.
• Mackinawite occurs in serpentinized peridotites as a hydrothermal alteration product, in meteorites, and in association with chalcopyrite, cubanite, pentlandite, pyrrhotite, greigite, maucherite, and troilite.
• Aubrites are primarily composed of large white crystals of the Fe-poor, Mg-rich orthopyroxene, or enstatite, with minor phases of olivine, nickel-iron metal, and troilite, indicating a magmatic formation under extremely reducing conditions.
• The researchers found that the fragments from the crater zone had a chondritic texture and the following mineral composition: pyroxene (1) 40%, olivine 20%, feldspar 10%, pyroxene (2) 10%; kamacite 15%, troilite 5%, and traces of chromite and native copper.
• Angrites are a rare group of achondrites consisting mostly of Al-Ti bearing diopside, hedenbergite, olivine, anorthite and troilite with minor traces of phosphate and metals.
• Mooihoekite occurs in association with haycockite, magnetite, troilite, cuprian pentlandite, mackinawite, sphalerite, and moncheite in the Mooihoek mine and with haycockite, native copper, troilite, pentlandite, cubanite and magnetite in the Duluth complex.
• The structure of type 1 consists mainly of pearlite and cementite or cohenite, with inclusions of troilite and silicate.
• It also contains the minerals chromite, daubréelite, schreibersite, akaganéite and inclusions of troilite.
• Accessory minerals include meteoric iron (kamacite, taenite and plessite), magnetite, troilite, plagioclase, schreibersite, maskelynite and chromite.
• Accessory minerals that also include non-silicates are: carlsbergite, chromite, cohenite, daubréelite, feldspar, graphite, ilmenite, merrillite, low-calcium pyroxene, schreibersite, tridymite and troilite.
• It occurs in meteorites along the grain boundaries of kamacite (nickel-rich native iron) or troilite (FeS: iron sulfide) in the form of tiny plates.
• Associated minerals include cliftonite (graphite), chromian diopside, troilite at Toluca; daubreelite, krinovite, roedderite, high albite, richterite, chromite (Canyon Diablo); and jadeite, chromite and chlorite (Burma).
• The resulting minerals have been preserved in a type of stony meteorite, eucrite (quartz, potassium feldspar, titanite and zircon) and in iron-nickel meteorites (iron-nickel alloys such as kamacite and taenite; transition metal sulfides such as troilite; carbides and phosphides).
• Padvarninkai, as many other eucrites, is rich in both pyroxene (mostly orthopyroxene with exsolved augite) and plagioclase (mostly bytownite and anorthite) with small amounts of chromite, ilmenite, pigeonite, tridymite and troilite.

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