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Fayalite | Article about Fayalite by The Free Dictionary

Fayalite. a mineral of the olivine group; the final member of the forsterite-fayalite solid-solution series. Fayalite has the chemical composition Fe 2[SiO4 ], and it contains up to 10 percent of the forsterite component. It is found with acidic and alkalic rocks, metamorphosed iron-rich sediments, pegmatites, and other rocks.Fayalite Mineral DataFayalite Crystallography: Axial Ratios: a:b:c =0.4666:1:0.5862 : Cell Dimensions: a = 4.76, b = 10.2, c = 5.98, Z = 4; V = 290.34 Den(Calc)= 4.66

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Fayalite | Scientific

Abstract: Carbonthermic method was adopted to reduce the iron in the form of fayalite in copper slag to metal iron in this study. The reduction was undertaken under the conditions of roasting reduction at 1423 K for 4 h with specified parameters that the ratio of copper slag versus anthracite was 2∶1, and that the ratio of calcium carbonate to silicon dioxide was 1.43∶1.FAYALITE AT ROCKPORT, MASSACHUSETTS*2007-4-5 · FAYALITE AT ROCKPORT, MASSACHUSETTS* Cn,lnrns Pa.racne, H arv ar d, U niv er s ity, C ambr i,d ge, M as s ac hus ett s Aesrn,{c1: The facts are collected concerning the place and mode of occurrence of fayalite at four Iocalities on Cape Ann, Massachusetts, with a description of one of them which yielded the largest and best-developed crystals.

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Fayalite Mineral Specimens

MD-40048 Cristobalite, Fayalite Canyon Butte occurrence (Couger Butte), Canyon Butte, Siskiyou Co., California, USA Small Cabinet 5.9 x 3.8 x 3.8 cmFabrication of a [email protected] nanocomposite with superior ...A fayalite (α-Fe2SiO4)@C nanocomposite is successfully fabricated by a solid state reaction under the flow of nitrogen gas. The [email protected] nanocomposite delivers a high specific capacity, excellent rate capability and good cycling …

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Fayalite: Mineral information, data and localities.

Fayalite: Kudoh Y, Takeda H (1986) Single crystal X-ray diffraction study on the bond compressibility of fayalite, Fe2SiO4 and rutile, TiO2 under high pressure Physica B 140 333-336: 1986: 4.9: 293: 0015001: FayaliteFayalite gemstone information - gemdat Fayalite. Fayalite is named after its discovery locality, on Fayal Island, Azores; although believed to occur in the local lavas. Fayalite is iron-bearing olivine mineral. Fayalite is very rare in nature, but common in man-made (metallurgy) iron slags. Faint: pale yellow - …

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Fayalite Mineral Data

General Fayalite Information : Chemical Formula: Fe++2SiO4 : Composition: Molecular Weight = 203.78 gm Iron 54.81 % Fe 70.51 % FeO: Silicon 13.78 % Si 29.49 % SiO 2: Oxygen 31.41 % O: 100.00 % 100.00 % = TOTAL OXIDEfayalite | mineral | Britannicafayalite. mineral. Print Cite verifiedCite While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions. Select Citation Style. …

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Inorganic polymers made of fayalite slag: On the ...

2018-1-4 · The microstructure of inorganic polymers (IP) formed from fayalite slag was investigated as a function of the composition of different activating solutions. The starting slag was 80 wt% amorphous, and after activation using sodium silicate solutions with varying SiO 2 /Na 2 O molar ratios, the amorphous phase dissolved and a binder phase was ...Olivine - NOVA MineralogyOlivine. Olivine is a solid solution series mineral whose two most common end members are forsterite (Mg) and fayalite (Fe). This page concerns itself with olivine in general. If you need end member-specific information, please see the …

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Minerals in Meteorites

2014-7-18 · Fayalite Fe 2 SiO 4 The iron end member of the olivine solid solution series. Fayalite content is diagnostic for petrographic types of ordinary chondrites. It is a major mineral in all chondrites except E chondrites. Feldspars (K,Na,Ca)(Si,Al) 4 O 8 A group of minerals including plagioclase and orthoclase. FeldspathoidsStructural and electronic properties of Fe2SiO4‐fayalite ...1990-12-10 · X ray diffraction and infrared spectroscopic measurements to pressures of 45–50 GPa, electrical resistivity and optical absorption to 70–80 GPa, and reflectance measurements to 225 GPa are presented for Fe 2 SiO 4 fayalite at 300 K. Diffraction results document that Fe 2 SiO 4 fayalite becomes amorphous on static loading to pressures in excess of 39 (±3) GPa, a …

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Fayalite Mineral Data

Fayalite Crystallography: Axial Ratios: a:b:c =0.4666:1:0.5862 : Cell Dimensions: a = 4.76, b = 10.2, c = 5.98, Z = 4; V = 290.34 Den(Calc)= 4.66fayalite | mineral | Britannicafayalite. mineral. Print Cite verifiedCite While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions. Select Citation Style. …

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53Mn-53Cr Dating of Fayalite Formation in the CV3 ...

1998-12-4 · Fayalite grains in chondrules in the oxidized, aqueously altered CV3 chondrite Mokoia have large excesses of radiogenic chromium-53. These excesses indicate the in situ decay of short-lived manganese-53 (half-life = 3.7 million years) and define an initial 53 Mn/ 55 Mn ratio of 2.32 (±0.18) × 10 –6.This ratio is comparable to values for carbonates in CI and CM …(PDF) Sol-gel synthesis of nanocrystalline fayalite (Fe2SiO4)2022-2-11 · Fayalite is widely used in various fields based on its structural characteristics and only exists in weak reducing environments. Excess ZVI (zero-valent iron) is used to regulate oxygen fugacity ...

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(PDF) Sol-gel synthesis of nanocrystalline fayalite (Fe2SiO4)

2022-2-11 · Fayalite (Fe2SiO4), and other Fe-rich olivine, is often found in the reducing environments of the Moon, Mars, and other extraterrestrial bodies, but the oxidation state of the terrestrial mantle .. terfacial phenomena between alumina and fayalite slag ...The contact angle between the fayalite-type slags and the alumina were determined to be relatively low, at about 16.9 to 19.6 degrees under the experimental conditions. The surface tension of fayalite slag (Fe/SiO 2=1.4) at an oxygen potential of log -11 was 0.298, which agreed with the work of previous researchers.

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FAYALITE AT ROCKPORT, MASSACHUSETTS*

2007-4-5 · FAYALITE AT ROCKPORT, MASSACHUSETTS* Cn,lnrns Pa.racne, H arv ar d, U niv er s ity, C ambr i,d ge, M as s ac hus ett s Aesrn,{c1: The facts are collected concerning the place and mode of occurrence of fayalite at four Iocalities on Cape Ann, Massachusetts, with a description of one of them which yielded the largest and best-developed crystals.Strength of fayalite up to 8.5 GPa | SpringerLink2016-12-9 · A dense polycrystalline aggregate of synthetic fayalite (Fe2SiO4) was deformed up to 8.5 GPa at room temperature in the D-DIA press installed at the European Synchrotron Radiation Facility beamline ID06. Five successive shortening–lengthening cycles were performed at different pressures and up to a final strain of approximately 25% at a typical strain rate of …

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Fayalite

Fayalite is a extremely rare member of the Olivine group of minerals that includes Dunilite, Fayalite, Forsterite and Peridot (Olivine)although Peridot is not recognized as a mineral that is split. Fayalite and Forsterite are simply known as Olivine. …Fayalite gemstone information - gemdat Fayalite. Fayalite is named after its discovery locality, on Fayal Island, Azores; although believed to occur in the local lavas. Fayalite is iron-bearing olivine mineral. Fayalite is very rare in nature, but common in man-made (metallurgy) iron slags. Faint: pale yellow - …

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Olivine: The mineral Olivine, peridot information and pictures

Fayalite gemstone information - gemdat fayalite | mineral | Britannicafayalite, iron-rich silicate mineral that is a member of the forsterite–fayalite series ( q.v.) of olivines. This article was most recently revised and updated by John P. Rafferty.

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Fayalite

Fayalite in igneous rocks most often has more or less similar habits. Of greater diversity are the minerals that form by rapid crystallization or quenching of melts at shallow depths or at the surface (komatiites, picrite basalts, picrite sills, and other mafic and ultramafic lavas) ( Deer et al., 1982 ). Like olivines in other pyrometamorphic ...Fayalite - National Gem LabFayalite is a extremely rare member of the Olivine group of minerals that includes Dunilite, Fayalite, Forsterite and Peridot (Olivine)although Peridot is not …

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Quartz-fayalite-iron and quartz-fayalite-magnetite ...

The quartz-fayalite-iron and quartz-fayalite-magnetite equilibria have been studied in the temperature range 1000–1400 and 1050–1300 K, respectively, using an electrochemical technique. The results are in excellent agreement with …Fayalite Mineral Specimens - The ArkenstoneMD-40048 Cristobalite, Fayalite Canyon Butte occurrence (Couger Butte), Canyon Butte, Siskiyou Co., California, USA Small Cabinet 5.9 x 3.8 x 3.8 cm

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Fayalite Mineral Specimens

MD-40048 Cristobalite, Fayalite Canyon Butte occurrence (Couger Butte), Canyon Butte, Siskiyou Co., California, USA Small Cabinet 5.9 x 3.8 x 3.8 cm53Mn-53Cr Dating of Fayalite Formation in the CV3 ...1998-12-4 · Fayalite grains in chondrules in the oxidized, aqueously altered CV3 chondrite Mokoia have large excesses of radiogenic chromium-53. These excesses indicate the in situ decay of short-lived manganese-53 (half-life = 3.7 million years) and define an initial 53 Mn/ 55 Mn ratio of 2.32 (±0.18) × 10 –6.This ratio is comparable to values for carbonates in CI and CM …

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Equation of state and sound wave velocities of fayalite at ...

In order to visualize the effect of fayalite elastic parameters on P and S wave velocities, we calculated V p and V s using the Python package burnman (Cottaar et al., 2014) with the formalism of Stixrude and Lithgow-Bertelloni (SLB2011) and data for fayalite (K T0 =135 GPa, K ′ = 4.22, G=50.9 GPa, G ′ = 1.46) and then with our ...FACT oxide database - detailed documentation2013-7-26 · Update of FACT-WOLL. CaSiO 3 with MgSiO 3, FeSiO 3 and MnSiO 3 in solution. Valid only if rich in CaSiO 3. End-members in pure compound database FToxidBase.cdb: CaSiO 3 (S1). References: 2027, 2032, 6026 [FToxid-bC2SA] Aa''Ca2SiO4. OXIDE solution alpha-prime Ca 2 SiO 4 . Approved optimized sub-system of FToxid-bC2S. Update of FACT-"C2S

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Interfacial phenomena between alumina and fayalite slag ...

The contact angle between the fayalite-type slags and the alumina were determined to be relatively low, at about 16.9 to 19.6 degrees under the experimental conditions. The surface tension of fayalite slag (Fe/SiO 2=1.4) at an oxygen potential of log -11 was 0.298, which agreed with the work of previous researchers.Synthetic fayalite Fe2SiO4 by kinetically controlled ...2019-3-4 · The present work explores the preparation of fayalite α-Fe 2 SiO 4, the iron-rich end-member of the olivine solid-solution series, as a tar removal catalyst for biomass gasification.The synthetic procedure was developed starting from the stoichiometric mixture of hematite and micrometer size silicon carbide and employing thermal treatments in controlled atmospheres …

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Fayalite Mineral Data

General Fayalite Information : Chemical Formula: Fe++2SiO4 : Composition: Molecular Weight = 203.78 gm Iron 54.81 % Fe 70.51 % FeO: Silicon 13.78 % Si 29.49 % SiO 2: Oxygen 31.41 % O: 100.00 % 100.00 % = TOTAL OXIDEFayalite - CAMEO2020-8-5 · Additional Information. Mineralogy Database: Fayalite Sources Checked for Data in Record. David C. Scott, Metallography and Microstructure of Ancient and Historic Metals, The Getty Conservation Institute, Los Angeles, 1991 C.W esterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979 Thomas …

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Study on Formation Mechanism of Fayalite (Fe2SiO4) by ...

2017-12-12 · The formation mechanism of fayalite from SiO 2, FeS and Fe 3 O 4 is determined by using TG-DSC, XRD, XPS, SEM-EDS (shown in supplementary Fig. S1), etc. The results show that the phase transition processes are Fe 3 O 4 → Fe 1– α O → Fe 3– x O 4 → Fe 2.95 Si 0.05 O 4 → Fe 2 SiO 4 and middle transition products Fe 3– x O 4 and Fe 2 ...Single‐crystal elasticity of fayalite to 12 GPa - Speziale ...1. Introduction [2] Fayalite is the Fe-rich end-member of the olivine solid solution series. In mineralogical models for the Earth''s mantle [Ringwood, 1975; Duffy and Anderson, 1989] olivine is a major component of the upper mantle.For this reason olivine''s physical properties are relevant to determine the behavior of upper mantle rocks.

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Minerals in Meteorites

2014-7-18 · Fayalite Fe 2 SiO 4 The iron end member of the olivine solid solution series. Fayalite content is diagnostic for petrographic types of ordinary chondrites. It is a major mineral in all chondrites except E chondrites. Feldspars (K,Na,Ca)(Si,Al) 4 O 8 A group of minerals including plagioclase and orthoclase. Feldspathoids(PDF) Sol-gel synthesis of nanocrystalline fayalite (Fe2SiO4)2022-2-11 · Fayalite (Fe2SiO4), and other Fe-rich olivine, is often found in the reducing environments of the Moon, Mars, and other extraterrestrial bodies, but the oxidation state of the terrestrial mantle ...

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(PDF) Single Crystal Raman Spectra of Forsterite, Fayalite ...

Polarized single crystal Raman spectra of the fundamental modes of forsterite (Mg2SiO4), olivine (Mg0.88,Fe0.12), fayalite (Fe2SiO4), and monticellite (CaMgSiO4) are presented.Solidus and liquidus temperatures and mineralogies for ...2012-8-16 · sures (i.e., in fact, dT/d X for each will probably temperature interval for B will be inevitable. In the increase if ~ is lowered along the fusion example in Fig. 2, L~Tfor the solidus and liquidus curve, resulting in a sharper "V" in the eutectic is reduced from 430° I atm., to 60° 7.5 valley).

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Structural and electronic properties of Fe2SiO4‐fayalite ...

1990-12-10 · X ray diffraction and infrared spectroscopic measurements to pressures of 45–50 GPa, electrical resistivity and optical absorption to 70–80 GPa, and reflectance measurements to 225 GPa are presented for Fe 2 SiO 4 fayalite at 300 K. Diffraction results document that Fe 2 SiO 4 fayalite becomes amorphous on static loading to pressures in excess of 39 (±3) GPa, a …Single‐crystal elasticity of fayalite to 12 GPa - Speziale ...1. Introduction [2] Fayalite is the Fe-rich end-member of the olivine solid solution series. In mineralogical models for the Earth''s mantle [Ringwood, 1975; Duffy and Anderson, 1989] olivine is a major component of the upper mantle.For this reason olivine''s physical properties are relevant to determine the behavior of upper mantle rocks.

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Fayalite

2020-8-5 · Additional Information. Mineralogy Database: Fayalite Sources Checked for Data in Record. David C. Scott, Metallography and Microstructure of Ancient and Historic Metals, The Getty Conservation Institute, Los Angeles, 1991 C.W esterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979 Thomas …Quartz-fayalite-iron and quartz-fayalite-magnetite ...The quartz-fayalite-iron and quartz-fayalite-magnetite equilibria have been studied in the temperature range 1000–1400 and 1050–1300 K, respectively, using an electrochemical technique. The results are in excellent agreement with …

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