Greigite is an iron sulfide mineral with the chemical formula Fe2+Fe3+2S4. It is the sulfur equivalent of the iron oxide magnetite (Fe3O4). It was first...
7 KB (562 words) - 20:55, 22 December 2023
iron and sulfur. By increasing order of stability: Iron(II) sulfide, FeS Greigite, Fe3S4 (cubic) Pyrrhotite, Fe1−xS (where x = 0 to 0.2) (monoclinic or hexagonal)...
1 KB (128 words) - 23:21, 14 March 2022
similar to iron(II,III) oxide. It occurs naturally as the sulfide mineral greigite and is magnetic. It is a bio-mineral produced by and found in magnetotactic...
7 KB (612 words) - 05:06, 25 December 2023
mollusc species, the scaly-foot gastropod, even uses the iron sulfides greigite and pyrite.[citation needed] Some organisms, such as some foraminifera...
19 KB (2,136 words) - 16:12, 13 July 2024
and in association with chalcopyrite, cubanite, pentlandite, pyrrhotite, greigite, maucherite, and troilite. Mackinawite also occurs in reducing environments...
12 KB (1,014 words) - 20:49, 9 January 2024
Iron(III) sulfide (section Greigite)
to the following reaction equation: Fe2S3 + 4 HCl → 2 FeCl2 + 2 H2S + S Greigite, with the chemical formula Fe2+Fe3+2S4, is a mixed valence compound containing...
3 KB (219 words) - 23:36, 23 January 2024
smell is mainly due to its sulfur content. Because of the presence of greigite (Fe3S4, Iron(II,III) sulfide) in the mineral, it forms brownish-pink to...
9 KB (968 words) - 19:47, 26 June 2024
about the environments in which greigite magnetofossils are created and the magnetic properties of the preserved greigite particles. Existence of magnetotactic...
13 KB (1,564 words) - 14:01, 20 November 2023
to exhibit framboidal structures include magnetite, hematite, and greigite. Greigite is considered an essential precursor of framboidal pyrite formation...
2 KB (287 words) - 22:15, 11 October 2023
sulfides greigite and pyrite. Each sclerite has a soft epithelial tissue core, a conchiolin cover, and an uppermost layer containing pyrite and greigite. Prior...
63 KB (6,299 words) - 13:29, 9 July 2024