- greigite
- грейгит, мельниковит, FeaS4
English-Russian dictionary of geology. 2011.
greigite
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Greigite — is an iron sulfide mineral with formula: Fe(II)Fe(III)2S4. It is a magnetic sulfide analogue of the iron oxide magnetite (Fe3O4). Greigite occurs as microscopic (< 0.03 mm) isometric hexoctahedral crystals and as minute sooty masses. It is a bio… … Wikipedia
greigite — noun A magnetic form of iron sulfide, FeFeS, analogous to magnetite, produced by microorganisms and found in lake sediments; Note: half the iron ions are ferrous and half ferric … Wiktionary
greigite — … Useful english dictionary
Magnétosomes et bactéries magnétotactiques — Les bactéries magnétotactiques (BMT) sont des micro organismes, découverts en 1970 par R. P. Blakemore, capables de se déplacer le long de lignes de champ magnétique. Elles contiennent des organites, les magnétosomes, qui sont à l origine de… … Wikipédia en Français
Magnetotactic bacteria — (or MTB) are a polyphyletic group of bacteria discovered by Richard P. Blakemore in 1975, that orient along the magnetic field lines of Earth s magnetic field. To perform this task, these bacteria have organelles called magnetosomes that contain… … Wikipedia
Greigit — Andere Namen IMA 1963 007 Chemische Formel FeII(FeIII)2S4 Mineralklasse Sulfide und Sulfosalze 2.DA.05 (8. Auflage II/D.01 010) (nach Strunz) 02.10.01.10 (nach Dana) Kristallsystem kubisch … Deutsch Wikipedia
Magnetosome — chains are membranous prokaryotic organelles present in magnetotactic bacteria. They contain 15 to 20 magnetite crystals that together act like a compass needle to orient magnetotactic bacteria in geomagnetic fields, thereby simplifying their… … Wikipedia
List of minerals F-J (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… … Wikipedia
Magnetofossils — are the fossil remains of magnetic particles produced by magnetotactic bacteria and preserved in the geologic record. The oldest definitive magnetofossils formed of the mineral magnetite come from the Cretaceous chalk beds of southern England,… … Wikipedia
Framboid — The term Framboid describes a micromorphological feature common to certain sedimentary minerals, particularly pyrite (FeS2). The first known use of the term is ascribed to Rust in 1935 and is derived from the French ‘la framboise’, meaning… … Wikipedia
Scaly-foot gastropod — Preserved specimen of Crysomallon squamiferum. Scientific classification Kingdom … Wikipedia
