fayalite


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Related to fayalite: magnetite

fay·a·lite

 (fā′ə-līt′)
n.
A yellowish to black mineral, Fe2SiO4, of the olivine group.

[German Fayalit, from Fayal, Faial.]

fayalite

(ˈfeɪəˌlaɪt; faɪˈɑːlaɪt)
n
(Minerals) a rare brown or black mineral of the olivine group, consisting of iron silicate. Formula: Fe2SiO4
[C19: named after Fayal]
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References in periodicals archive ?
Elastic Plastic Self-Consistent (EPSC) Modeling of Plastic Deformation in Fayalite Olivine, American Mineralogist, 100, 2015, pp.
Magnetite is abundant (up to 10%), much of it replacing what may have been fayalite crystals, by comparison with similar alteration in syenite in the West Barneys River plutonic suite of the Antigonish Highlands in which elict fayalite has survived (Escarraga 2010).
Typical high temperature non magnetic minerals found in pyrometamorphic rocks associated with coal combustion appear to include several Fe and Al rich clinopyroxene, melilita, cristobalite, tridymite, mullite, cordierite and fayalite solid solutions, as well as glass (Foit et al.
Fayalit-bearing gabbros are made of abundant fayalite (Fo 5), hedenbergite, plagioclase (An 43-25), minor quartz and apatite, Ti-magnetite, ilmenite, sulphide (Tournon & Azema, 1984).
1998, Equilibria among titanite, hedenbergite, fayalite, quartz, ilmenite and magnetite: experiments and internally consistent thermodynamic data for titanite, Amer.
On a more detailed basis, Vert viride (the bluish green used in Station I for the toga worn by Pontius Pilatus) contains chromium oxide (Cr2O3 x 2H2O, Guignet's formula patented in Paris in 1859) plus cobalt oxide giving the bluish shade; Vert olive passe, although containing some chromium oxide, may also have a component of olivine, a rare mineral of volcanic origin including, in variable percentages, green fayalite and colourless forsterite, two high-fusing point silicates (forsterite 1850[degrees]C; fayalite 1200[degrees]C), a circumstance that would explain the difficulty in producing an enamel with this hue to be processed at temperatures below 1000[degrees]C as, according to the Lenci records, this could not be procured from any of its other suppliers.
Iron valence measurements were calibrated using Fe-bearing mineral standards of known Fe valence: fayalite ([Fe.
Standards and elements lines were as follows: magnesian manganoan fayalite (SiK[alpha], MgK[alpha], MnK[alpha], and FeK[alpha]), synthetic anorthite (AlK[alpha] and CaK[alpha]), rutile (TiK[alpha]), synthetic ZnO (ZnK[alpha]), Amelia albite (NaK[alpha]), and microcline (KK[alpha]).
Gross (1962) reported the occurrence of fayalite in an "augite syenite.