troilite
Sign in to saveTroilite () is a rare iron sulfide mineral with the simple formula of FeS. It is the iron-rich endmember of the pyrrhotite group. Pyrrhotite has the formula Fe(1−x)S (x = 0 to 0.2) which is iron deficient. As troilite lacks the iron deficiency which gives pyrrhotite its characteristic magnetism, troilite is non-magnetic.
Key facts
- Mineral.name
- Troilite
- Mineral.image
- Mundrabilla.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Polished and etched surface of the Mundrabilla meteorite from Australia. The darker brownish areas with striations are troilite with exolved daubréelite.
- Mineral.category
- Sulfide mineral
- Mineral.formula
- FeS
- Mineral.IMAsymbol
- Tro
- Mineral.strunz
- 2.CC.10
- Mineral.system
- Hexagonal
- Mineral.class
- Ditrigonal dipyramidal (m2) H-M symbol: (m2)
- Mineral.symmetry
- P2c
- Mineral.unit cell
- a = 5.958, c = 11.74 [Å]; Z = 12
- Mineral.color
- Pale gray brown
- Mineral.habit
- Massive, granular; nodular; platey to tabular
- Mineral.cleavage
- None
- Mineral.fracture
- Irregular
- Mineral.mohs
- 3.5–4.0
- Mineral.luster
- Metallic
via Wikipedia infobox
Wikidata facts
- Image
- Sikhote alin.jpg
Show 6 more facts
- IMA Mineral Symbol
- Tro
- Commons category
- Troilite
- Nickel-Strunz 9th edition (updated 2009)
- 2.CC.10
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 2.CC.10
- chemical formula
- FeS
- Strunz 8th edition (series ID, updated)
- II/B.09a
Sources (2)
via Wikidata · CC0
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Article
5 sectionsContents
- Structure
- Discovery
- Occurrence
- See also
- References
Troilite () is a rare iron sulfide mineral with the simple formula of FeS. It is the iron-rich endmember of the pyrrhotite group. Pyrrhotite has the formula Fe(1−x)S (x = 0 to 0.2) which is iron deficient. As troilite lacks the iron deficiency which gives pyrrhotite its characteristic magnetism, troilite is non-magnetic.
Troilite can be found as a native mineral on Earth but is more abundant in meteorites, in particular, those originating from the Moon and Mars. It is among the minerals found in samples of the meteorite that struck Russia in Chelyabinsk on February 15th, 2013. Uniform presence of troilite on the Moon and possibly on Mars has been confirmed by the Apollo, Viking and Phobos space probes. The relative intensities of isotopes of sulfur are rather constant in meteorites as compared to the Earth minerals, and therefore troilite from Canyon Diablo meteorite is chosen as the international sulfur isotope ratio standard, the Canyon Diablo Troilite (CDT).