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- Fayalite abstract "Fayalite (Fe2SiO4), also called iron chrysolite, is the iron-rich end-member of the olivine solid-solution series. In common with all minerals in the olivine group, fayalite crystallizes in the orthorhombic system (space group Pbnm) with cell parameters a 4.82 Å, b 10.48 Å and c Å 6.09.Fayalite forms solid solution series with the magnesium olivine endmember forsterite (Mg2SiO4) and also with the manganese rich olivine endmember tephroite (Mn2SiO4). Iron rich olivine is a relatively common constituent of acidic and alkaline igneous rocks such as volcanic obsidians, rhyolites, trachytes and phonolites and plutonic quartz syenites where it is associated with amphiboles. Its main occurrence is in ultramafic volcanic and plutonic rocks and less commonly in felsic plutonic rocks and rarely in granite pegmatite. It also occurs in lithophysae in obsidian. It also occurs in medium-grade thermally metamorphosed iron-rich sediments and in impure carbonate rocks.Fayalite is stable with quartz at low pressures, whereas more magnesian olivine is not, because of the reaction olivine + quartz = orthopyroxene. Iron stabilizes the olivine + quartz pair. The pressure and compositional dependence of the reaction can be used to calculate constraints on pressures at which assemblages of olivine + quartz formed.Fayalite can also react with oxygen to produce magnetite + quartz: the three minerals together make up the "FMQ" oxygen buffer. The reaction is used to control the fugacity of oxygen in laboratory experiments. It can also be used to calculate the fugacity of oxygen recorded by mineral assemblages in metamorphic and igneous processes.The name fayalite is derived from Faial (Fayal) Island in the Azores where it was first described in 1840.".
- Fayalite thumbnail Fayalite_crystal_group_-_Ochtendung,_Eifel,_Germany.jpg?width=300.
- Fayalite wikiPageID "1245859".
- Fayalite wikiPageRevisionID "603237208".
- Fayalite 2v "Measured: 74° to 47°, Calculated: 54° to 66°".
- Fayalite birefringence "δ = 0.042 – 0.051".
- Fayalite caption "Fayalite crystal group from Ochtendung, Eifel, Germany".
- Fayalite category Silicate_minerals.
- Fayalite cleavage "{010} moderate, {100} imperfect".
- Fayalite color "Greenish yellow, yellow-brown, brown; pale yellow to amber in thin section".
- Fayalite diaphaneity "Transparent".
- Fayalite formula "Fe2SiO4".
- Fayalite fracture "Conchoidal".
- Fayalite gravity "4.392".
- Fayalite habit "Commonly granular, compact, or massive".
- Fayalite hasPhotoCollection Fayalite.
- Fayalite luster "Vitreous to resinous on fractures".
- Fayalite mohs "6.5".
- Fayalite name "Fayalite".
- Fayalite opticalprop "Biaxial".
- Fayalite pleochroism "Faint".
- Fayalite refractive "nα = 1.731 – 1.824 nβ = 1.760 – 1.864 nγ = 1.773 – 1.875".
- Fayalite streak "White".
- Fayalite strunz "9".
- Fayalite symmetry Hermann%E2%80%93Mauguin_notation.
- Fayalite symmetry "Orthorhombic dipyramidal".
- Fayalite symmetry "Space group: Pbnm".
- Fayalite system "Orthorhombic Dipyramidal".
- Fayalite twinning "On [100]; also on [031], as trillings".
- Fayalite unitCell "a = 4.8211 Å, b = 10.4779 Å, c = 6.0889 Å; Z=4".
- Fayalite wordnet_type synset-mineral-noun-1.
- Fayalite subject Category:Iron_minerals.
- Fayalite subject Category:Nesosilicates.
- Fayalite type Abstraction100002137.
- Fayalite type IronMinerals.
- Fayalite type Material114580897.
- Fayalite type Matter100020827.
- Fayalite type Mineral114662574.
- Fayalite type Part113809207.
- Fayalite type PhysicalEntity100001930.
- Fayalite type Relation100031921.
- Fayalite type Substance100019613.
- Fayalite type ChemicalSubstance.
- Fayalite type Mineral.
- Fayalite type ChemicalObject.
- Fayalite type Thing.
- Fayalite comment "Fayalite (Fe2SiO4), also called iron chrysolite, is the iron-rich end-member of the olivine solid-solution series. In common with all minerals in the olivine group, fayalite crystallizes in the orthorhombic system (space group Pbnm) with cell parameters a 4.82 Å, b 10.48 Å and c Å 6.09.Fayalite forms solid solution series with the magnesium olivine endmember forsterite (Mg2SiO4) and also with the manganese rich olivine endmember tephroite (Mn2SiO4).".
- Fayalite label "Faialite".
- Fayalite label "Fajalit".
- Fayalite label "Fayaliet".
- Fayalite label "Fayalit".
- Fayalite label "Fayalita".
- Fayalite label "Fayalite".
- Fayalite label "Fayalite".
- Fayalite label "Fayalite".
- Fayalite label "Фаялит".
- Fayalite sameAs Fayalit.
- Fayalite sameAs Φαϋαλίτης.
- Fayalite sameAs Fayalita.
- Fayalite sameAs Fayalite.
- Fayalite sameAs Fayalite.
- Fayalite sameAs Fayaliet.
- Fayalite sameAs Fajalit.
- Fayalite sameAs Faialite.
- Fayalite sameAs m.04lsnl.
- Fayalite sameAs Q411130.
- Fayalite sameAs Q411130.
- Fayalite sameAs Fayalite.
- Fayalite wasDerivedFrom Fayalite?oldid=603237208.
- Fayalite depiction Fayalite_crystal_group_-_Ochtendung,_Eifel,_Germany.jpg.
- Fayalite isPrimaryTopicOf Fayalite.
- Fayalite name "Fayalite".