• Greigite - Wikipedia

    en.wikipedia.org/wiki/Greigite Greigite is an iron sulfide mineral with formula Fe 3 S 4 (Iron(II,III) sulfide).It is the sulfur equivalent of the iron oxide magnetite (Fe 3 O 4).It was first described in 1964 for an occurrence in San Bernardino County, California, and named after the mineralogist and physical chemist Joseph W. Greig (1895–1977).
  • Greigite | Fe3S4 - PubChem

    pubchem.ncbi.nlm.nih.gov/compound/Greigite Greigite is an iron sulfide mineral with formula Fe3S4. It has a role as a catalyst. It is a sulfide mineral, a member of iron(2+) sulfides and a member of iron(3+) sulfides. ChEBI. Contents. 1 Structures Expand this section. 2 Names and Identifiers Expand this section.
  • Greigite: Mineral information, data and localities.

    www.mindat.org/min-1747.html Named in honor of Joseph Wilson Greig (1895, Ontario, Canada - 22 October 1977, Lewistown, Pennsylvania, USA), a mineralogist and physical chemist at at the Geophysical Laboratory of the Carnegie Institution, Washington, D.C., USA and later at Pennsylvania State University, State College, Pennsylvania, USA.
  • Greigite - an overview | ScienceDirect Topics

    www.sciencedirect.com/topics/earth-and-planetary-sciences/greigite Greigite is the sulfur analog of magnetite and has a similar inverse spinel structure (Fig. 8).The unit cell of greigite has a = 9.876 Å and consists of eight Fe 3 S 4 moieties. Eight Fe atoms occur in tetrahedral A-sites and sixteen in octahedral B-sites. In the spinel structure, this arrangement would reflect the formula AB 2 S 4, where A = Fe II and B = Fe III, giving the overall formula ...
  • Greigite dictionary definition | greigite defined

    www.yourdictionary.com/greigite greigite definition: Noun (uncountable) 1. (mineralogy) A magnetic form of iron sulfide, Fe2+Fe3+2S4, analogous to magnetite, produced by microorganisms and found in lake sediments; Note: half the iron ions are ferrous and half ferric.Origin From Jose...
  • Greigite - RRUFF Database: Raman, X-ray, Infrared, and ...

    rruff.info/Greigite REFERENCES for Greigite; American Mineralogist Crystal Structure Database Record: [view record] Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America.
  • Greigite Mineral Data

    webmineral.com/data/Greigite.shtml Excalibur Mineral Corp. Google Search for Greigite Exceptional Minerals Google Search for Greigite John Betts Fine Minerals Search for Greigite McDougall Minerals Google Search for Greigite Mineral News Website Link Rock and Mineral Shows Google Search for Greigite Weinrich Minerals, Inc. Google Search for Greigite. Ask about Greigite here :
  • Greigite: a true intermediate on the polysulfide pathway ...

    www.ncbi.nlm.nih.gov/pmc/articles/PMC1847509 The results clearly show that greigite is formed as an intermediate on the pathway from mackinawite to pyrite. The kinetics of the transformation of mackinawite to greigite and pyrite follow a zero-order rate law indicating a solid-state mechanism.
  • Electronic structures of greigite (Fe3S4): A hybrid ...

    www.ncbi.nlm.nih.gov/pmc/articles/PMC4751502 Greigite (Fe 3 S 4) is a ferrimagnetic mineral with vital functions in both the bio-geochemical cycle and novel technological applications.However, the ground state electronic structure of this material has not been fully characterized by either experiment or theory. In the present study, ab initio calculations using the hybrid functional method have been performed to investigate the ...
  • Iron(II,III) sulfide - Wikipedia

    en.wikipedia.org/wiki/Iron%28II%2CIII%29_sulfide Iron(II,III) sulfide is a blue-black (sometimes pinkish) chemical compound of iron and sulfur with formula Fe 3 S 4 or FeS·Fe 2 S 3, which is much 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 bacteria.It is a mixed valence compound, featuring both Fe 2+ and Fe 3+ centers, in 1:2 ratio.