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Iron end-member of olivine, a nesosilicate mineral
Fayalite (Fe 2SiO 4, commonly abbreviated to Fa) is the iron-rich end-member of the olivine solid-solution series. In common with all minerals in the olivine
Fayalite
Mineral of magnesium iron silicate
Mg2SiO4) and fayalite (Fe-endmember: Fe2SiO4). Compositions of olivine are commonly expressed as molar percentages of forsterite (Fo) or fayalite (Fa) (e.g
Olivine
Magnesium end-member of olivine, a nesosilicate mineral
solid solution series. It is isomorphous with the iron-rich end-member, fayalite. Forsterite crystallizes in the orthorhombic system (space group Pbnm)
Forsterite
Green gem-quality mineral
temperature. The oxidation of the olivine occurs by an initial breakdown of the fayalite component, and subsequent reaction with the forsterite component, to give
Peridot
Melting points of chemical mixtures
a slurry). Such is the case, for example, with the olivine (forsterite-fayalite) system, which is common in Earth's mantle. In chemistry, materials science
Liquidus_and_solidus
Epidote Piemontite Erythrite Esperite Ettringite Euclase Eudialyte Euxenite Fayalite Feldspar Andesine Albite Anorthite Anorthoclase Amazonite Bytownite Celsian
List_of_gemstones_by_species
Ferrohortonolite is a mineral variety in the olivine series composed of 70% to 90% fayalite and 30% to 10% forsterite or Fe/(Fe+Mg) ratio of 0.7 to 0.9. It is from
Ferrohortonolite
Chemical element with atomic number 1 (H)
these conditions, water is capable of oxidizing ferrous (Fe2+ ) ions in fayalite, generating hydrogen gas: Fe2SiO4 + H2O → 2 Fe3O4 + SiO2 + H2 Closely related
Hydrogen
Geochemical assemblage
Fe3O4 + O2 ⇌ 6 Fe2O3 NiNiO: nickel-nickel oxide: 2 Ni + O2 ⇌ 2 NiO FMQ: fayalite-magnetite-quartz: 3 Fe2SiO4 + O2 ⇌ 2 Fe3O4 + 3 SiO2 WM: wüstite-magnetite:
Mineral_redox_buffer
Scanning Electron Microscope interface image of a fayalite-pyroxene symplectite (at right) in a Martian meteorite
Symplectite
Hydrocarbon compound (CH4) in natural gas
forsterite and fayalite whose general formula is (Fe,Mg)2SiO4. The reaction producing methane from olivine can be written as: Forsterite + Fayalite + Water +
Methane
Life arising from non-living matter
2H+ + 2e− FeS + H2S + CO2 → FeS2 + HCOOH The reactions are: Reaction 1: Fayalite + water → magnetite + aqueous silica + hydrogen 3Fe2SiO4 + 2H2O → 2Fe3O4
Abiogenesis
Topics referred to by the same term
Factor analysis, a statistical method Fanconi anemia, a genetic disease Fayalite, an olivine mineral Femtoampere (fA) Fluorescein angiography, for eye examination
FA
Mineral at the end of a mineral series
a group or series of minerals. For example, forsterite (Mg 2SiO 4) and fayalite (Fe 2SiO 4) are the two end-members of the olivine solid-solution series
Endmember
Peralkaline rhyolite type of volcanic rock
most strongly peralkaline rocks. Mafic minerals may include aegirine, fayalite, aenigmatite, ilmenite, and sodic amphibole (often arfvedsonite or ferrorichterite)
Pantellerite
Crystalline chemical element or compound formed by geologic processes
iron-rich end-members are considered separate minerals (forsterite and fayalite). The details of these rules are somewhat controversial. For instance,
Mineral
Igneous, volcanic rock, of felsic (silica-rich) composition
trydimite are sometimes present along with the quartz. Biotite, augite, fayalite, and hornblende are common accessory minerals. Due to their high content
Rhyolite
Chemical compound with an oxygen atom
anions (a negatively charged ion). Iron silicate, Fe2SiO4, the mineral fayalite, is one of many examples of a ternary oxide. For many metal oxides, the
Oxide
Fringe theory about the origin of petroleum
of Forsterite and Fayalite metamorphoses into serpentine, magnetite and silica by the following reactions, with silica from fayalite decomposition (reaction
Abiogenic_petroleum_origin
Group of chondrites with low iron and low metal content
present as iron oxide (FeO) in the silicates; olivine contains 26 to 32 mol% fayalite (Fa). The most abundant minerals are hypersthene (a pyroxene) and olivine
LL_chondrite
Hydrothermal field in the mid-Atlantic Ocean
Fayalite (Olivine)3 Fe2SiO4 + water2 H2O → Magnetite2 Fe3O4 + Silica (aqueous)3 SiO2 + Hydrogen2 H2 Hydrogenesis
Lost_City_Hydrothermal_Field
Type of meteorite
dominant minerals, but these terms are now obsolete. Characteristic is the fayalite content (Fa) in olivine of 21 to 25 mol%. About 4–10% iron–nickel is found
L_chondrite
Formation of serpentinite by hydration and metamorphic transformation of olivine
solution of forsterite, the magnesium endmember of (Mg2+, Fe2+)2SiO4, and fayalite, the iron endmember, with forsterite typically making up about 90% of the
Serpentinization
Chemical solution in solid form
endmembers of the solid solution series: forsterite (Mg-endmember: Mg2SiO4) and fayalite (Fe-endmember: Fe2SiO4) but the ratio in olivine is not normally defined
Solid_solution
Enstatite var., belonging to the group of orthorhombic pyroxenes
ferrosilite is stable only at elevated pressure, decomposing into quartz and fayalite at atmospheric pressure unless stabilized by magnesium or other impurities
Hypersthene
Artefact of ancient iron production
Ratio MeO : SiO2 silicate examples 2 : 1 fayalite 2 : 1 monticellite 1.5 : 1 melilite 1 : 1 pyroxene Fayalite (Fe2SiO4) is the most common mineral found
Archaeometallurgical_slag
Type of meteorite
minerals are bronzite (an orthopyroxene), and olivine. Characteristic is the fayalite (Fa) content of the olivine of 16 to 20 mol%. They contain also 15–19%
H_chondrite
series exists between tephroite and its analogues, the group endmembers fayalite and forsterite. Divalent iron or magnesium may readily replace manganese
Tephroite
Iron ore mineral
buffer. At lower oxygen levels, magnetite can form a buffer with quartz and fayalite known as the QFM buffer. At still lower oxygen levels, magnetite forms
Magnetite
cell is somewhat larger than for the calcium free olivines forsterite and fayalite with a = 0.4815 nm, b = 1.108 nm and c = 0.637 nm, and for monticellite
Monticellite
Rock formation in Wyoming, Montana, and Idaho
plagioclase, along with minor proportions of magnetite, ilmenite, ferroaugite, fayalite, iron-rich hornblende, zircon, chevkinite, and allanite. However, the abundance
Lava_Creek_Tuff
Metamorphism resulting from combustion of coal or hydrocarbon deposits
silicate minerals, the typical ones are especially cordierite, indialite, fayalite, mullite, tridymite and cristobalite (both tridymite and cristobalite may
Pyrometamorphism
Iron(II) oxide (FeO) mineral formed under reducing conditions
and olivine if it is present as Fe2+; Fe3+ cannot enter the lattice of fayalite olivine and thus for every two Fe3+ ions, one Fe2+ is used and one molecule
Wüstite
Fe2O12W3 iron(III) orthotungstate Fe2P diiron phosphide 1310-43-6 Fe2SiO4 fayalite 13918-37-1 Fe3H2Na2O45Si chrysotile white asbestos 12001-28-4 Fe3O4 iron(II
Glossary_of_chemical_formulae
Rock-forming minerals with predominantly silicate anions
Phenakite – Be2SiO4 Willemite – Zn2SiO4 Olivine group Forsterite – Mg2SiO4 Fayalite – Fe2SiO4 Tephroite – Mn2SiO4 Garnet group Pyrope – Mg3Al2(SiO4)3 Almandine
Silicate_mineral
Rock formed by transformation of olivine
minerals. The serpentinization reaction involving the transformation of fayalite (Fe-end member of olivine) by water into magnetite and quartz also produces
Serpentinite
Topics referred to by the same term
First Minister's Questions (Northern Ireland Assembly) in Northern Ireland Fayalite-magnetite-quartz, a mineral redox buffer FMQ League, a group of Japanese
FMQ
beryl) Fabianite Farneseite Faujasite (subgroup of zeolites) Faustite Fayalite (olivine group) Feldspar (mineral group) Feldspathoid (mineral group) Felsőbányaite
List_of_minerals
Knebelite is a manganese variety of the fayalite-tephroite series with formula (Fe,Mn)2SiO4. It forms dark green orthorhombic crystals. It is reported
Knebelite
Type of furnace once used widely for smelting iron from its oxides
the furnace, where they combine with molten slag, often consisting of fayalite, a compound of silicon, oxygen, and iron mixed with other impurities from
Bloomery
Study of magnetic properties of minerals
biotite 1,500-2,900 siderite 1,300-11,000 chromite 3,000-120,000 orthopyroxene 1,500-1,800 fayalite 5,500 olivine 1,600 jacobsite 25,000 franklinite 450,000
Magnetic_mineralogy
Oldest-surviving crustal material from the Hadean eon
Hadean Jack Hills zircons show a range in fO2 with an average near the fayalite-magnetite-quartz (FMQ) buffer. The Hadean geological setting is similar
Hadean_zircon
Application of oxidation state to the study of the Earth's mantle
pairs dominate. Data for plotting are from Shearer et al., (2006). IW represents iron-Wüstite buffer and QFM represents quartz-fayalite-magnetite buffer.
Mantle_oxidation_state
Change of minerals in pre-existing rocks without melting into liquid magma
crystals. An example of a neocrystallization reaction is the reaction of fayalite with plagioclase at elevated pressure and temperature to form garnet. The
Metamorphism
Mg, Fe, Al cyclosilicate mineral
in a sequence: mullite + tridymite, followed by sekaninaite and finally fayalite + clinoferrosilite (Grapes et al., 2010). Similar trends are observed for
Sekaninaite
Process of extracting copper from the ground
"Metal loss to slag: Part I. Sulfidic and oxidic dissolution of copper in fayalite slag from low grade matte". Metallurgical Transactions. 5 (3): 531–538
Copper_extraction
Cultural forging process for bladed weapons
silicon in the clay reacts with wustite to form fayalite and, at around 2,190 °F (1,200 °C), the fayalite becomes a liquid. This liquid acts as a flux,
Japanese_swordsmithing
Meteorite that hit Kaba, Hungary in 1857
Allende > oxidized Bali Fayalite forsterite series composition: red (Fa 32–60) - ox. All (Fa 32–60) - ox. Ba (Fa 10–90) Pure fayalite occurs only in the oxidized
Kaba_meteorite
Town in Kaduna State, Nigeria
811. The Kudaru ring complex was discovered to contain mildly alkaline fayalite granite porphyry, peralkaline arfvedsonite granite and metaluminous biotite
Kudaru
Bodies that commonly occur in vitreous igneous rocks
these lithophysae are several centimeters or more in diameter. Tridymite, fayalite and other minerals in the lithophysae may be precipitates from the vapor
Spherulite
Community in Enugu State, Nigeria
spectroscopy) analysis shows that the slag composition is mainly composed of fayalite, spinel and ferrite, with a high iron content. During this period, iron
Lejja
Sedimentary rocks with ferric oxides
example, the most easily altered material would be olivine: e.g. Fe2SiO4 (fayalite) + O2 → Fe2O3 (hematite) + SiO2 (quartz) with E = −27.53 kJ/mol A key feature
Red_beds
Portuguese island of the Central Group of the Azores
extending the Ponta dos Capelinhos into the western ocean. The mineral fayalite is named for this island, having been first identified and described there
Faial_Island
Shift of atomic positions in a crystal structure
"Observation of Cation Reordering during the Olivine-Spinel Transition in Fayalite by In Situ Synchrotron X-Ray Diffraction at High Pressure and Temperature"
Diffusionless_transformation
Complex hydrated phosphate mineral
an ARL-SEMQ microprobe; the values were Durango apatite for P, Rockport fayalite for Mn, and Kakanui hornblende for all others. In a separate sample, beryllium
Zanazziite
Graphical representation of the pressure-temperature history of a metamorphic rock
Intergrowth of fayalite-pyroxene symplectite (grey) against apatite (white) exhibits a symplectitic texture on the right.
Pressure-temperature-time path
Pressure-temperature-time_path
Geologic formation in New Mexico, USA
vitrophyric tuff at the base of the main bed contain ferrohedenbergite and fayalite, while the upper beds sometimes preserve sodic amphibole phenocrysts. The
Amalia_Tuff
Fluor-dravite Fdrv Favreauite Fav Ferro-katophorite Foktp Fluor-elbaite Felb Fayalite Fa Ferrokentbrooksite Fktb Fluorellestadite Fel Fedorite Fdr Ferrokësterite
List_of_mineral_symbols
Method of joining metal pieces
onto the metal. The silicon in the sand reacts with the wustite to form fayalite, which melts just below the welding temperature. This produced a very effective
Forge_welding
Group of rare meteorites
hosts isolated ferromagnesian silicates, such as olivine (forsterite with fayalite Fa10–20), clinopyroxene, and orthopyroxene, which crystallized at high
CI_chondrite
Metal casting process using sand as the mold material
typically uses olivine sand (a mixture of the minerals forsterite and fayalite, which is made by crushing dunite rock). The choice of sand has a lot to
Sand_casting
List of IMA recognized minerals and groupings
ores and other mixtures of minerals Lapislazuli*, Psilomelane*, Olivine* (Fayalite-Forsterite Series) Ice Liquids: Water, Mercury Hg, Asphaltum* Amorphous
Classification of non-silicate minerals
Classification_of_non-silicate_minerals
Type of mineral
(forsterite) favors production of magnesite from peridotite. Iron-rich olivine (fayalite) favors production of magnetite-magnesite-silica compositions. Magnesite
Magnesite
Meteorite
chondrites, possibly indicating formation on a separate parent body. Its fayalite, ferrosilite place this stone at the extreme higher end of L chondrites
Qidong_(meteorite)
Volcano in West Antarctica
volume and consist mostly of alkali feldspar, with subordinate apatite, fayalite, hedenbergite and opaque minerals. Benmoreite has more phenocrysts, which
Mount_Berlin
Mountain in Antarctica
phenocryst phases found in the pantellerite include aenigmatite, anorthoclase, fayalite, hedenbergite, ilmenite and quartz. A blue ice field has formed within
Mount_Moulton
American geologist (1871–1944)
1933. Smith, George Otis. "Notes on crystals of scapolite, gypsum, and fayalite..." Johns Hopkins University Circular, pp. 81–83 (1894) Smith, George Otis
George_Otis_Smith
Meteorite found in Lithuania
including enstatite, ferrosilite, serpentine group, barringerite, diopside, fayalite, ferrosilite, magnetite, pentlandite, pyrrhotite. Analysis of the noble
Jodzie
Transformation of Fe(OH)2 into Fe3O4 with hydrogen release
reaction Serpentinization reaction, involving also the transformation of fayalite (Fe-end member of olivine) into magnetite, quartz and hydrogen: 3 Fe2SiO4
Schikorr_reaction
Historic district in Pennsylvania, United States
bottom of the furnace also fills with molten slag, often consisting of fayalite, a compound of silicon, oxygen and iron mixed with other impurities from
Cornwall_Iron_Furnace
Pilo-Pleistocene caldera in Baja California
common minerals in the ignimbrites are feldspar and clinopyroxene, while fayalite is rare. In addition to these minerals, the youngest rocks are andesites
La_Reforma_(caldera)
Disintegrating exoplanet
exoplanets. In the case of KOI-2700b, the tail most likely consists of fayalite (Fe2SiO4) and/or corundum (Al2O3). A composition of pure iron, graphite
KOI-2700b
First lunar meteorite discovered on Earth
ferrosilite and wollastonite. The olivine is a solid solution of 11 to 40% fayalite with the rest being forsterite. ALH A81005 is classified as a "lunar anorthosite
Allan_Hills_A81005
Stratovolcano in the Antarctic
Phenocrysts include aegirine, amphibole, anorthoclase, augite, clinopyroxene, fayalite, hedenbergite, ilmenite, kaersutite, magnetite, olivine, plagioclase and
Mount_Melbourne
Single chain inosilicate mineral
association with clinopyroxene, plagioclase, ilmenite, cristobalite, tridymite, fayalite, fluorapatite and potassic feldspar, and forms series with pyroxmangite
Pyroxferroite
List of IMA recognized minerals and groupings
Th(SiO4)1−x(OH)4x, IMA2008-035 CeSiO4 Olivine group Calcio-Olivine Ca2SiO4, Fayalite (Fe2+)2[SiO4], Forsterite Mg2[SiO4], Laihunite Fe2+(Fe3+)2(SiO4)2, Liebenbergite
Classification of silicate minerals
Classification_of_silicate_minerals
mined for minerals, including Fluorite, cryolite, topaz, smoky quartz, fayalite, galena, and microcline. The Western Museum of Mining & Industry is a museum
Mining in Colorado Springs, Colorado
Mining_in_Colorado_Springs,_Colorado
Star in the constellation Taurus
inner edge of the inner disk being located near the sublimation radius of fayalite and iron, it is suggested that the inner disk is composed of these materials
LSPM_J0207+3331
almandine-pyrope series); quartz, var. amethyst. Note: the fosterite–fayalite solid solution series is called olivine. Illustration, Ancient Egypt. Ancient
Timeline of the discovery and classification of minerals
Timeline_of_the_discovery_and_classification_of_minerals
Extinct cinder cone butte in Portland, Oregon
brown, granular olivine crystals with 80 percent forsterite and 20 percent fayalite; and tiny black, hexagonal plates of hematite with beveled edges. These
Rocky_Butte
Geologic formation in New Mexico
clinopyroxene and orthopyroxene, and extremely rare microphenocrysts of fayalite. In the more densely welded portions of the member, the sanidine is chatoyant
Bandelier_Tuff
rotation axis: 2 FeO + SiO2 → Fe2SiO4 (sometimes denoted as 2FeO•SiO2, fayalite) After the first portion of slag is poured off the converter, a new portion
Manhès–David_process
Water and its precursors in asteroids
activity on the ordinary and carbonaceous chondrite parent bodies recorded by fayalite". Nature Communications. 6 7444. Bibcode:2015NatCo...6.7444D. doi:10.1038/ncomms8444
Asteroidal_water
Favreauite (IMA2014-013) 4.0 [58] [no] [no] (PbBiCu6O4(SeO3)4(OH)·H2O) Fayalite (olivine: 1840) 9.AC.05 [59] [60] [61] (IUPAC: diiron(II) (tetraoxo silicate))
List of minerals recognized by the International Mineralogical Association (F)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(F)
Group of geologic formations in New Mexico, USA
Ma old and has phenocrysts of sanidine, quartz, plagioclase, and sparse fayalite. All have a total rock composition characteristic of rhyolite. The Young
Polvadera_Group
FAYALITE
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