
	Where results make sense

Topic: Fayalite

Related Topics

Augite

Nephrite

Franklinite

Jadeite

Olivine

Diopside

Pyroxene

Chromite

Peridotite

Corundum

Gerousia

Amesbury High School

Scandinavia

Prudential Financial

Mesa Community College

In the News (Sun 29 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	MYRMEKITE 13 OF 50
		Hypersthene and fayalite in the leucogranite are unlikely inherited from Bonsall tonalite in the wall rock.
		Fayalite in magmatic granites and syenites, however, is known to be stable only at high temperatures (>900 degrees C) and where granites contain less than 5 vol.
		The occurrence of fayalite coexisting with 26-40 vol.
	www.csun.edu /~vcgeo005/rubidoux.htm (3700 words)

	FAYALITE (Iron Magnesium Silicate)
		Fayalite due to its iron content has a higher index of refraction, is heavier and has a darker color than forsterite.
		Fayalite's higher iron content makes for darker, less attractive specimens that are not generally used as gemstones.
		Fayalite is also found in many iron-nickel meteorites, not just as small grains but as large crystals sometimes occupying over 50% of the meteorite's volume.
	mineral.galleries.com /minerals/silicate/fayalite/fayalite.htm (540 words)

	Methods of increasing the redox ratio of iron in a glass article - Patent 6605555
		Fayalite occurs naturally as a mineral or may be prepared synthetically.
		In order to help prevent the ferrous iron from reoxidizing to ferric iron during the melting of the glass batch components, a reducing agent, e.g., a carbon source such as graphite, coal, preferably anthracite coal, or an aqueous or nonaqueous sugar containing material may be added to the glass batch of the invention.
		It is believed that this lower level of fayalite and coal addition are not sufficient to overcome the oxidizing effects of the salt cake addition and the air atmosphere inside the electric furnace that was used during melting of the laboratory glasses.
	www.freepatentsonline.com /6605555.html (5310 words)

	Fayalite Minerals,Fayalite Information,Fayalite Uses,Fayalite Occurrences,Fayalite Suppliers
		Fayalite is the iron rich end-member of the olivine solid-solution series.
		Fayalite is from olivine group and it is one of the two minerals that are simply called olivine.
		Fayalite is found in the ultramafic igneous rocks.
	www.mineralszone.com /minerals/fayalite.html (162 words)

	OLIVINE (Magnesium Iron Silicate)
		Fayalite due to its iron content has a higher index of refraction, is heavier and has a darker color than forsterite.
		Besides its actual mineral names, forsterite and fayalite, it is known as "chrysolite", "evening emerald" and peridot.
		Forsterite crystallizes first with fayalite crystallizing last when other minerals such as the pyroxenes are just beginning to form.
	www.galleries.com /minerals/silicate/olivine/olivine.htm (840 words)

	PSR Discoveries:Hot Idea: From a cloud of Gas & Dust
		The fayalite formed at about the same time as carbonate grains in carbonaceous chondrites (which everyone agrees formed in asteroids, not in the nebula) and several types of meteorites that formed by melting in asteroids.
		he grains of fayalite were found in microscope mounts of the Mokoia carbonaceous chondrite, so the determination of the amounts of chromium-53 had to be done by an instrument that can measure the abundance of an isotope in a thin, polished slice of a rock.
		Thus, the dating of the fayalite grains in Mokoia by Ian Hutcheon and his collaborators, coupled with research by others, show that meteorite hydrothermal alteration, heating, and melting took place up to 10 million years after the formation of the first solids in the Solar System.
	www.psrd.hawaii.edu /Feb99/fayalite.html (1463 words)

	Point Defect Relaxation in Fayalite (Site not responding. Last check: 2007-10-10)
		The stability field of the silicate fayalite is narrow with regard to crystal composition.
		Relaxation experiments with isothermal changes of oxygen activity were carried out to determine the kinetics of electronic defects in fayalite.
		The diffusion of defects derived from these experiments on oriented single crystals was found to be anisotropic: diffusion is fastest in the <001> direction and slowest in the <100> direction.
	sun1.rrzn.uni-hannover.de /nhcfjank/abs_ullrich.html (174 words)

	fayalite (Site not responding. Last check: 2007-10-10)
		Fayalites have a crystal system that is orthorhombic.
		Fayalites hardness is 7 and its density is measured at 4.32.
		Typical occurrences are found in Imperial, Inyo, Riverside, and Siskiyou counties, California; in the Cheyenne Mountain area, El Paso County, Colorado; at Obsidian Cliff, Yellow stone Park, Wyoming; at Rockport, Essex County, Massachusetts; and at Salt lake Crater, Oahu, Hawaii, also Sweden, France, Sicily, Germany, Finland, New Caledonia, and elsewhere.
	academic.evergreen.edu /curricular/MN/fayalite.htm (124 words)

	Mineral description : Olivine serie
		Some references are considering only the purer endmembers of the series as fayalite or forsterite, the intermediate interval (10-90%) is called olivine.
		I have made a page for localities with olivine, since many reports only talks about olivine and I don't have any analyse results to decide which mineral was found.
		A common mineral, for example in the NRM database there are 223 references (plus fayalite 31, forsterite 13).
	www.geology.neab.net /minerals/olivine.htm (168 words)

	olivine.htm
		Olivine is widespread in basalts and gabbros, and is often the first mineral to form magmas of this composition.
		- Fayalitic olivine is found in hornfels developed in the Ironwood Iron Formation near its contact with the gabbroic rocks of the Mellen complex.
		It is also found in the form of fayalite as an accessory in some of the alkali granite, monzonite and pegmatite in the Nine Mile Pluton.
	www.uwrf.edu /~william.s.cordua/olivine.htm (848 words)

	1998 Campaign: BSEM images of slags (Site not responding. Last check: 2007-10-10)
		Early fayalite (bright) with sharp crystal terminations, overlain by Ca-rich fayalite (bright) plus leucite (dark), overlain in turn by magnetite (bright), rhönite (pale grey) and fassaite (mid grey).
		Early fayalite (bright), overlain by leucite (dark)/fayalite (bright) eutectic and by Ca-rich fayalite (bright), overlain in turn by magnetite (bright), rhönite (pale grey) and glass bearing ?fassaite and spheroids of native iron.
		Wüstite (white) dendrites, followed by large fayalite (bright) laths, followed in turn by a much finer second generation of olivine with 70% kirschsteinite.
	www.geoarch.demon.co.uk /experimental/slags.html (196 words)

	Olivine (Site not responding. Last check: 2007-10-10)
		Forsterite and olivine are incompatible with free silica because they react with it to give pyroxene; as a consequence, olivine and quartz cannot crystallize together in a rock.
		Fayalite, however, does not react in this way, and fayalite occurs in some granites and rhyolites.
		Fayalite melts at 1205°C, forsterite at 1890°C; thus, magnesium-rich olivine, with a very high melting point, is used in the manufacture of refractory bricks.
	geology.csupomona.edu /alert/mineral/olivine.htm (347 words)

	Borrok (Site not responding. Last check: 2007-10-10)
		The main Vergenoeg pipe consists of primary fluorite, magnetite, ilmenite, fayalite, and quartz and is surrounded by hematite-fluorite tuff-like bodies, that appear to have been erupted from the pipe.
		These consisted of fayalite and magnetite in a ratio of about 5 to 1, but did not appear to be melt inclusions because they were not circular and were extensively altered to secondary ferroactinolite and ferropyrosmalite.
		Early deposition of ilmenite, magnetite, fayalite, apatite and fluorite took place in a highly reducing environment, as indicated by high values of CH in ore-related inclusions.
	www.geology.wisc.edu /flincs/fi/pac6/borrok.html (578 words)

	Iron Oxide Cu-Au Monograph Abstracts
		Horizontal zoning exists in the pipe, with a hematite-fluorite or gossan cap at surface, followed by a deeper zone of unoxidised magnetite-fluorite, then a magnetite-fayalite transition zone and finally a fayalite zone at the deepest levels.
		Although iron oxide, fluorite and fayalite assemblages constitute 90% of the mineral content, accessory siderite, iron-sulphides and Rare Earth Elements (REE) are common.
		Fluorite and iron oxides are present in variable quantities throughout the pipe but fluorite decreases with depth, with resultant increases in iron oxides and fayalite.
	www.portergeo.com.au /feoxbook/Abstract22.asp (497 words)

	SPHERULITES - LoveToKnow Article on SPHERULITES (Site not responding. Last check: 2007-10-10)
		The steam and other vapours in the magma would fill these empty spaces and exert a powerful mineralizing action on the warm rock.
		The presence of garnet, tridymite, fayalite and other minerals, very abnormal in rhyolites in these cavitieS, in the lithophysae is accounted for in this way.
		The fibres of these coarse spherulites are often broad and seem to belong to alkali feispar (sanidine or anorthoclase) embedded in tridymite and glass; by analogy it is often inferred that the extremely tenuous fibres of ordinary spherulites have the same composition.
	www.87.1911encyclopedia.org /S/SP/SPHERULITES.htm (1016 words)

	IRONSMELTING.NET´¯`·.¸Alexander's Archaeology Site¸.·´¯`·.¸Iron Smelting and ... (Site not responding. Last check: 2007-10-10)
		The first is a glass edge, with some drops of Fem on the edge, an area of fayalite laths and some fl 'needles'.
		The third area has magnetite 'spine'-dendrites and wüstite dendrites in a glass and fayalite matrix, some molten quartz and fl 'needles'.
		The fourth area is a heterogeneous edge with some magnetite and fayalite in a glass matrix, and many sand-grain inclusions.
	www.ironsmelting.net /www/smelting/clay5.htm (229 words)

	[Ganoksin] - Lets Talk Gemstones - Peridot
		Several deposits are located in South Africa, but the O'Niel mine in New York in the United States produces the majority of this member of the series.
		Fayalite is the iron-rich end member of the series and was first discovered on the shores of Fayal island in the Azores.
		Fayalite exhibits a hardness of 6.5, a specific gravity of 4.39 and refractive indices of 1.827 to 1.879, each the highest of this solid solution series.
	www.ganoksin.com /borisat/nenam/peridot.htm (1441 words)

	Meteorites 101
		The fayalite number is the ratio of fayalite/fosterite in olivine.
		The H's are characterized by ~15-21% fayalite (these are sometimes referred to as olivine-bronzite chondrites although that is rather outdated usage), the L's by ~22-26% fayalite (the olivine-hypersthene chondrites), the LL's, > 28-32%.
		The frequency of occurrence of fayalite numbers from the H's through the L's and LL's is not uniform, but reaches a max.
	www.meteoritetimes.com /Back_Links/2002/August/meteorites_101.htm (1533 words)

	Dar al Gani 610, H4
		Each was analyzed for their fayalite and ferrosilicate compositions by standard electron microprobe techniques at the Marshall Space Flight Center.
		Microprobe analyses gave a fayalite composition of Fa 17.8 (n=26) and a pyroxene composition of Fs 16.1, Wo 1.1 (n=12).
		Microprobe analyses gave a fayalite composition of Fa 17.2 (n=25) and a pyroxene composition of Fs 15.4, Wo 1.5 (n=14).
	www.saharamet.com /meteorites/chondrites/DaG610.html (406 words)

	[No title]
		Compare this to the probability of finding a place where fayalite and albite coexist without a melt.
		Consider a melt with composition equivalent to 70% fayalite and 30% albite.
		Describe what happens when olivine of composition 60% fayalite is slowly heated to some temperature above the solidus assuming that all melt squirts off (is separated from the olivine) as soon as it forms.
	www.und.nodak.edu /instruct/mineral/320petrology/review/questions02.htm (684 words)

	NORTHWEST AFRICA 773 PHOTO (Site not responding. Last check: 2007-10-10)
		Boundary textures between the two lithologies indicate that the cumulate lithology was a large clast within the breccia lithology (Fagan et al.
		FeO-rich symplectites (fayalite-hedenbergite-silica), which also represent late-stage differentiates, are present in the breccia, along with some unusual clast types; one containing fayalite, hyalophane, silica, and plagioclase, and another containing silica, K-feldspar, plagioclase, troilite, baddeleyite, and RE-merrillite.
		Although variable mineral proportions found in studied samples had previously indicated that the cumulate portion was a norite or gabbronorite, the dominance of clinopyroxene over orthopyroxene in the plagioclase-orthopyroxene-clinopyroxene ternary diagram (Stöffler et al., 1980) suggests that this lithology is actually a gabbro.
	www.geocities.com /CapeCanaveral/9278/protected_NWA773.HTM (1579 words)

	Peridot Page. Quartz 'N' All - High Quality Crystals, Minerals and Fossils
		An important rock forming mineral in basic and ultra-basic igneous rocks; fayalite occurs rarely in some quartz bearing igneous rocks; Firsterte in metamorphosed siliceous dolomite; olivine in some meteorites.
		Peridot in Eifel (Germany) on St John's Island in the red sea (Egypt) in mogok (Myanmar - formerly Burma, fayalite in rhyolites in Yellowstone National Park, Wyoming USA, and in granite pegmatites in the Mourne Mountains Ireland.
		But the most common olivine is of intermediate composition and has a pleasant olive green colour,from which it's name is derived.
	www.quartznall.co.uk /learnperidot.htm (257 words)

	The mineral chemistry and petrology of Tertiary pitchstones from Scotland
		Phenocryst assemblages are completely anhydrous, comprising mixtures of plagioclase, sanidine, fayalite, orthopyroxene, pigeonite, ferroaugite, ferrohedenbergite and quartz.
		Microcrystallite populations are equally diverse, consisting of mixtures of sanidine, ferrohedenbergite, fayalite, and occasionally, almost pure end-member ferrosilite, as well as hydrous phases such as ferrohornblende and biotite.
		The glass trapped between glomeroporphyritic clots of plagioclase and fayalite is typically free of crystallites.
	www.abdn.ac.uk /geology/profiles/auming/pitchstone/pitchstones.htm (723 words)

	oLIVINE2 (Site not responding. Last check: 2007-10-10)
		CRYSTAL GROWTH AND HABITS Both Fayalite and Forsterite produce tabular crystals with wedge shaped termination.
		OCCURRENCE Both Fayalite and Forsterite are found in mafic and ultra mafic igneous rocks like peridotite and dunite, and in metamorphosed impure limestones.
		Fayalite was named after the island Fayal (Faial) in the Azores.
	www.gc.maricopa.edu /earthsci/imagearchive/olivine2.htm (141 words)

	Fayalite
		HISTORY : the name derives from the island of Fayal (Azores islands) and was G. Melin that had the honor to declare to the world the discovery of this mineral in 1840.
		The fayalite is used as matter of refractory materials and abrasion; the most transparent crystals and with best intense colorations (var.
		COMMENT : for the acknowledgment it is important to recognize esactly rocks when it is found crystalized while to distinguish fayalite from mineral brothers they are very useful color and density; personally the fayalite crystals that I think are more fascinating are those that are recovered in the meteorite specimens
	www.minerali.it /minerali2/f/fayaliteenglish.htm (319 words)

	Olivine
		It can occur as fayalite, which is the iron end-member, or forsterite, the magnesium end-member, or as a solid solution between the two.
		Using the non-photographed interference figure, we determined that the 2V is approximately 50 degrees, and that the figure was optically negative.
		I know that this means that we were looking at fayalite, the iron end-member of the olivine group.
	www.mtholyoke.edu /~mpeterso/classes/phys301/projects2001/pajudge/olivine.html (737 words)

	Igneous Rock Exercise – (Site not responding. Last check: 2007-10-10)
		Out of that magma, I see 10 crystals of Fayalite and 5 crystals of Forsterite form.
		Determine the new composition of the magma after the minerals form.
		730 atoms of oxygen (O) Out of that magma, 7 crystals of Fayalite form, 3 crystals of Forsterite form, and 6 crystals of Anorthite form.
	csmres.jmu.edu /geollab/reinhold/igrockexercise.htm (1046 words)

Try your search on: Qwika (all wikis)