
	Where results make sense

Topic: Uraninite

Related Topics

Pitchblende

Uranophane

Autunite

Torbernite

Coffinite

Uranium

Nuclear fuel cycle

Monazite

Decay mode

Muscovite

Ulexite

Radium

Ore

Ultramarine

Radioactivity

In the News (Sat 14 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Uraninite - Wikipedia, the free encyclopedia
		Uraninite is a uranium-rich mineral with a composition that is largely UO (uranium oxide), but which also contains UO and oxides of lead, thorium, and rare earths.
		All uraninite minerals contain a small amount of radium as a radioactive decay product of uranium; it was in pitchblende from the Jáchymov in Czechoslovakia that Marie Curie discovered radium.
		Small amounts of helium are also present in uraninite as a result of alpha decay.
	en.wikipedia.org /wiki/Uraninite (226 words)

	Uraninite
		Uraninite is a uranium-rich mineral with a composition that is largely UO, but which also contains UO and oxides of lead, thorium, and rare earths.
		The uraninite may occur as fl octahedral crystals of high specific gravity (9.0 - 10.63); when in masses of pitch[?]-like lustre it is called pitchblende.
		All uraninites and pitchblende contain a minute amount of radium; it was in pitchblende from the Jáchymov[?] in Czechoslovakia that Marie Curie discovered radium.
	www.ebroadcast.com.au /lookup/encyclopedia/ur/Uraninite.html (120 words)

	Uraninite Source Fabrication and Testing Notes
		The uraninite specimen was crushed with a steel punch and hammer in a stainless steel container.
		The uraninite fragments were checked throughout the separation process with a GM counter and temporarily stored on a plastic container.
		The source used crushed uraninite embedded evenly in a vacuum epoxy matrix to increase the overall activity of the specimen because of the greater surface area.
	jamsci.org /2003-12-18/004/UraniniteSource.html (988 words)

	Uraninite
		Uraninite is the main ore of uranium, and a source of radium and helium.
		Uraninite is at one end of a 'spectrum' of minerals, with Thorianite at the opposite end, varrying in the amount of uranium and thorium that they contain.
		Luster - The luster of the Uraninite is sub-metalic.
	www.uraniumminerals.com /UTh/Uraninite.htm (3412 words)

	URANINITE Chapter 22. Oxides and hydroxides
		Uraninite, a uranium oxide mineral, was reported by Frondel (1970) from Sterling Hill.
		In 1989, a specimen of uraninite associated with green clinopyroxene altering to amphibole and fluorapatite was found on the Buckwheat Dump in Franklin.
		The uraninite, verified by use of X-ray diffraction techniques, was a 4 x 5 mm rectangular crystal with very high luster on broken surfaces.
	simplethinking.com /dunn/ch22/uraninite.stm (181 words)

	Rocks & Minerals: Uraninite: Strickland Quarry, Portland, Connecticut Topsham, Maine (Site not responding. Last check: 2007-10-21)
		Uraninite is typically seen as an opaque, steel-fl to velvet-fl mineral with a submetallic to greasy luster.
		Good uraninite specimens have been found at the famous Palermo and Ruggles mines in Grafton County, New Hampshire; dendritic uraninite intergrowths and associated brightly colored secondary minerals in perthitic feldspar from the latter occurrence are widely represented in collections.
		Uraninite cubes to 2 mm have been found in pegmatites near Hartwell Dam in Hart County, and cubes to 5 mm with metatorbernite, meta-autunite, soddyite, and beta-uranophane have been recovered from the Moye mica mine near Barnesville, Lamar County, Georgia.
	www.findarticles.com /p/articles/mi_m0GDX/is_5_79/ai_n6248983 (1045 words)

	uraninite.htm (Site not responding. Last check: 2007-10-21)
		Description: Uraninite is a strongly radioactive mineral found in pegmatites, high temperature hydrothermal veins, and lower temperature ground water precipitates in reduced sedimentary environments and along unconformities.
		FLORENCE COUNTY: Uraninite occurs in the lithium-rich pegmatites in Fern in T. (Falster, 1992, pers.
		WOOD COUNTY: - Sparsely disseminated uraninite occurs as anhedral grains in granitic rocks at the Mathy (a.k.a.
	www.uwrf.edu /~wc01/uraninite.htm (283 words)

	E PGMs in Kodar-Udokan Albitites
		Uraninite is the concentrator of uranium which is presented by two forms – by uranitite itself and by more recent pitchblende as reniform aggregates.
		The grain of uraninite (UO) heterogeneous by chemical composition: the proportion of Pb is larger in bright parts than in dark ones.
		By microprobe analysis of more than 20 grains of uraninite from different samples have shown that concentration of Pb and U in minerals vary from 68 to 79 for uranium and from 20 to 9 wt.% for lead.
	www.natires.com /epgm_udok.htm (1211 words)

	uraninite -- Encyclopædia Britannica (Site not responding. Last check: 2007-10-21)
		A variety of uraninite ore that is dense and found in granular masses with a greasy lustre is called pitchblende.
		Uraninite is radioactive and is the chief source of uranium.
		amorphous, fl, pitchy form of the crystalline uranium oxide mineral uraninite (q.v.); it is one of the primary mineral ores of uranium, containing 50–80 percent of that element.
	www.britannica.com /eb/article-9074424?tocId=9074424 (671 words)

	Uraninite (Site not responding. Last check: 2007-10-21)
		Uraninite is found in pegmatites, hydrothermal veins and clastic sedimentary deposits.
		Notable occurances of uraninite are in Wilberforce, Ontario, Canada; Shrinklobwe, Shaba, Zaire and the Colorado Plateau, USA.
		A variety of uraninite is called pitchblende which is a combination of mostly uraninite and some other minerals.
	www.museums.udel.edu /mineral/mineral_site/education/radioactive/uraninite.html (103 words)

	URANINITE (Uranium Oxide)
		Uraninite is a highly radioactive and interesting mineral.
		Weathered or otherwise altered uraninite produces some wonderful by-products such as the beautiful uranyl phosphate minerals like autunite and torbernite as well as uranyl silicates like sklodoskite and cuprosklodowskite.
		However, in uraninite, crystals are rare and the cleavage is not usually observable.
	mineral.galleries.com /minerals/oxides/uraninit/uraninit.htm (325 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		Uraninite is a fl ore with brown tints.
		Uraninite was found by Madam Curry (A great French female scientist) with a great deal of help from her husband.
		Uraninite is a source of tremendous energy: one soft ball size of the stuff can release more power than a train load of coal!
	math.arizona.edu /~dwang/andrew.html (293 words)

	The failure of U-Th-Pb ‘dating’ at Koongarra, Australia
		Uraninite (light grey) has been dissolved and redeposited as thin veinlets and shapeless masses within a chlorite (dark grey) matrix which is also replacing the main uraninite grain.
		The Pb in the galena is supposed to have migrated from the uraninite where it was supposedly produced by radioactive decay.
		Analyses of alteration sequences of uraninites to uranyl silicates at Koongarra.
	answersingenesis.org /home/Area/magazines/tj/docs/tj_v9n1_koongarra.asp (5235 words)

	Uraninite (Site not responding. Last check: 2007-10-21)
		Uraninite es un mineral uranio-rico con una composición que sea en gran parte UO, pero que también contiene UO y óxidos del terminal, del torio, y de las tierras raras.
		Todos los uraninites y pechblenda contienen una cantidad pequeña de radio un producto radiactivo del decaimiento del uranio; era en pechblenda del Jáchymov en Checoslovaquia que el curie de Marie descubrió el radio.
		Uraninite también contiene siempre las cantidades pequeñas de los isótopos del terminal, de Pb-206 y de Pb-207, de los productos finales de la serie del decaimiento de los isótopos de uranio U-238 y de U-235 respectivamente.
	www.yotor.net /wiki/es/ur/Uraninite.htm (250 words)

	URANINITE & OTHER RADIOACTIVE MINERALS
		The samples were analyzed to calculate the richness of the Uraninite ore, and to identify the associated minerals.
		The Epoxy provided a seal coat over the Uraninite for both safe handling of the specimens, and as part of the stabilization process which was done to prepare the specimens to be cut with a diamond blade saw.
		Item T. is the largest Uraninite specimen Dr. Gross had in his collection, from any of the localities in the “Colorado Plateau” — all of which have been closed and depleted for 35 years or more.
	www.minresco.com /radioactive/radioactive03.htm (695 words)

	Uraninite
		Uraninite is named for its high uranium content.
		Uraninite is a primary mineral in granites and pegmatites as well as in some high temperature hydrothermal veins.
		Uraninite is best known for being an ore of uranium, the substance that fuels atomic weapons and atomic energy.
	www.museums.udel.edu /mineral/mineral_site/collection/alphabetical/U/uraninite.html (101 words)

	URANINITE FACTS AND INFORMATION (Site not responding. Last check: 2007-10-21)
		Uraninite is a uranium-rich mineral with a composition that is largely UO (uranium oxide), but which also contains UO and oxides of lead, thorium, and rare_earths.
		All uraninite minerals contain a small amount of radium as a radioactive_decay product of uranium; it was in pitchblende from the JÃ¡chymov in Czechoslovakia that Marie Curie discovered radium.
		The extremely rare element technetium can be found in uraninite in very small
	www.witwik.com /uraninite (201 words)

	mineralogy
		Silicified breccia fragments are cemented by a fl-colored, fine-crystalline matrix composed of uraninite intergrown with kaolinite.
		The oxidation of Nopal I uraninite and the sequence of alteration products, their intergrowths and morphologies are remarkably similar to those observed in reported corrosion experiments using spent fuel and unirradiated UO under conditions intended to approximate those anticipated for the proposed Yucca Mountain repository.
		Granular uraninite (G) composed of fine crystalline uraninite intergrown with kaolinite is followed by colloform uraninite (C).
	www.swri.org /4org/d20/ghs/PBlanca/mineral.html (1286 words)

	Uranium Ore - Medium Radiation Level
		Chunks of Uraninite can be seen bursting through the surface on all sides of this rock.
		Chunks of Uraninite are imbedded all through this sample and can be seen from all sides.
		Jet fl Uraninite chunks run all through this sample and it looks quite attractive against the background of Granite and pink Feldspar that the host rock is composed of.
	www.unitednuclear.com /med.htm (346 words)

	uraninite (Site not responding. Last check: 2007-10-21)
		Uraninite is found in hydrothermal vein deposits, and is also found as a byproduct from conglomerate gold ores or other rock conglomerates.
		Uraninite deposits in conglomerate rocks are found in sedimentary rocks, cheifly sandstones, the sandstones are oxidized to carnotite and other secondary uranyl minerals which may themselves constitute important uranium ores.
		In uraninite crystals are rare and cleavage is not usually observable.
	www.eas.slu.edu /People/Students/woodhull/uraninite.html (403 words)

	Uraninite Mineral Data
		Comments: Polished slab of fl "gummite" ore with the uraninite altering to various secondary uranium minerals in a brecciated matrix.
		Uraninite is Radioactive as defined in 49 CFR 173.403.
		Weight of pure Uraninite in grams (gm) and Calculated Diameter of a Sphere with a Density of 10.97 gm/cc.
	www.webmineral.com /data/Uraninite.shtml (327 words)

	v21b in sm04
		Various zones in uraninite were analyzed by electron microprobe, which not only quantifies the element substitution in uraninite, but also permits calculation of the chemical U-Pb ages of these zones.
		The observed substitutions in natural uraninite are mostly by silicon with SiO2 contents up to 0.6 wt%, by calcium with CaO contents up to 2.1 wt%, by iron with FeO contents up to 0.9 wt%, and by titanium with TiO2 contents up to 0.8 wt%.
		The concentration of lead, with PbO contents of 9.1 wt% in the least altered uraninite, is anti-correlated with the substitution elements, which indicates that it is replaced by these.
	www.agu.org /cgi-bin/SFgate/SFgate?&listenv=table&multiple=1&range=1&directget=1&application=sm04&database=/data/epubs/wais/indexes/sm04/sm04&maxhits=200&="V21B" (2420 words)

	Uraninite (Site not responding. Last check: 2007-10-21)
		Uraninite is also known as uranium oxide; thorium is also found in this mineral.
		Black uraninite is called pitchblende; M and Mme Curie discovered polonium and radium in pitchblende.
		Uraninite is recognized as an important source of uranium.
	www.alientravelguide.com /science/chemistr/inorgani/compound/simpoxid/uraninit.htm (80 words)

	Uraninite Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-10-21)
		Looking For uraninite - Find uraninite and more at Lycos Search.
		Find uraninite - Your relevant result is a click away!
		Look for uraninite - Find uraninite at one of the best sites the Internet has to offer!
	www.karr.net /encyclopedia/Uraninite (316 words)

	Oxides (Site not responding. Last check: 2007-10-21)
		These radioactive minerals are detected by Geiger counter or scintillometer, since usually the minerals themselves are too small to see with the naked eye.
		Uraninite generally occurs as massive, botryoidal, or banded coatings.
		The microcrystalline variety of uraninite is called pitchblende.
	www.uky.edu /KGS/coal/webrokmn/pages/oxides.html (306 words)

	URANINITE NANOCRYSTALS AND FULLERENE IN ATMOSPHERIC PARTICULATES (Site not responding. Last check: 2007-10-21)
		Due to the extremely low concentrations, the form of the uranium has been unknown.
		Using a variety of advanced electron microscopy techniques, we have identified for the first time nanocrystals of uraninite, UO 2+x
		The "carbon-caged" nanocrystals of uraninite are protected from the immediate oxidation that would lead to increased mobility of uranium in the environment.
	gsa.confex.com /gsa/2002AM/finalprogram/abstract_39344.htm (197 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations (Site not responding. Last check: 2007-10-21)
		A study was made of the effect of heat treatment on reduction of cell size of gamma uraninite to correspond to age values consistent with those of the a1pha type.
		A number of specimens of uraninite from Bisundni and Gaya and thorianite from Ceylon was used for the study.
		Data are tabulated on the shrinkage of the cell size of uranium dioxide as followed by a close doubling of the higher-angle diffraction lines.
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=4171801 (170 words)

Try your search on: Qwika (all wikis)