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Topic: Autunite

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	AUTUNITE (Hydrated Calcium Uranyl Phosphate)
		Autunite is one of the more attractive and popular radioactive minerals.
		Autunite is probably the most popular uranium mineral for collectors.
		Autunite can lose water and convert to a different mineral called meta-autunite-I of the meta-autunite/meta-torbernite group of minerals and with heating can produce a meta-autunite-II mineral.
	mineral.galleries.com /minerals/phosphat/autunite/autunite.htm (395 words)

	Autunite: Daybreak mine, Spokane County, Washington Rocks & Minerals - Find Articles
		Autunite is now known to be orthorhombic (mmm), pseudotetragonal, occurring typically as thin plate-like or flaky crystals that are tabular on {010}, displaying rectangular or octagonal outlines.
		Autunite is quite widespread as a secondary mineral formed by the near-surface oxidization of primary uranium-bearing minerals in such diverse occurrences as granitic pegmatites, hydrothermal veins, felsic plutons including those of granite and quartz-monzonite composition, and roll-front and other sediment-hosted uranium deposits.
		Autunite is widespread in the eastern United States and is particularly well known as an accessory in complex pegmatites that have been prospected for mica, feldspar, spodumene, and gems.
	www.findarticles.com /p/articles/mi_m0GDX/is_3_80/ai_n13676529 (758 words)

	Autunite - Biocrawler (Site not responding. Last check: 2007-10-11)
		Autunite crystallizes in the tetragonal system and often occcurs as tabular square crystals.
		Museums are known to have covered the mineral with lacquer to avoid drying of the mineral.
		Autunite was discovered in 1852 near Autun, France.
	www.biocrawler.com /encyclopedia/Autunite (240 words)

	Autunite Mineral Data
		Comments: Corner of a meta-autunite crystal showing the dehydration of autunite (dark green) to meta-autunite (lighter yellowish green)..
		Autunite is Radioactive as defined in 49 CFR 173.403.
		Weight of pure Autunite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.22 gm/cc.
	webmineral.com /data/Autunite.shtml (328 words)

	meta-Autunite
		These fragments retain the general form of Autunite, and are therefore a pseudomorph of Autunite.
		Almost all crystals are pseudomorphs of Autunite, and are partial due to contact with other crystals or the matrix.
		Appearence - The Meta-Autunite is in the form of a pseudomorph of Autunite in 'cock's comb' stacks of crystals.
	www.uraniumminerals.com /UTh/M-Autunite.htm (1190 words)

	Dehydration of synthetic autunite hydrates
		In addition, a fourth phase with a basal plane spacing between that of autunite and metaautunite I, designated metaautunite Ia, was identified as an apparent metastable intermediate.
		TGA analysis confirmed that water loss or accumulation is tolerated to different degrees among the autunite hydrates.
		The complex dehydration pattern of autunite is not observed in all the 1: 1 uranyl phosphates, such as chernikovite (H[(UO SREL Reprint #2494
	www.uga.edu /srel/Reprint/2494.htm (215 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations (Site not responding. Last check: 2007-10-11)
		Autunite from the Daybreak mine was studied optically, chemically, and by x-ray diffraction.
		The autunite is commonly zoned from light-yellow margins to dark-green or fl cores, and autunite from the inner zone has a higher gravity and higher refractive indices than peripheral light material.
		X-ray-powder-diffrtiction patterns of dark and light meta-autunite formed from this autunite show no significant differences in the d spacings; however, diffraction patterns of nine zoned samples each show uraninite to be present in the dark, and absent from the light, phase.
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=4178745 (494 words)

	Autunite (Site not responding. Last check: 2007-10-11)
		Autunite ranges in color from bright yellow to pale or deep green.
		Autunite is mined in Washington State, New Hampshire, North Carolina, and New Mexico.
		Lemon yellow autunite crystals are most desirable for raising sexual energy to the heart level.
	www.prcupcc.org /stones/ad/autunite.htm (231 words)

	Laser Induced Fluorescence
		The uranyl ion UO is present in many naturally occurring minerals such as autunite, liebigite, andersonite, and opal.
		The breadth originates from the strong interaction of the UO ion with the thermal vibrations of the surrounding crystal lattice.
		Fluorescence measurements of autunite at 4.2 K reveal substantially reduced linewidths and direct evidence for the phonon modes discussed above.
	www.breadloaf.middlebury.edu /~PHManual/laser.html (1210 words)

	Autunite
		Autunite is highly valued by collectors for its Fluorescent, Radioactive crystals.
		Spokane, Washington, coarsely cry-stalline autunite is developed in vugs, fractures, and shear...
		AUTUNITE, or CALCO-URANITE, a mineral which is one of the uranium micas, differing from the more commonly occurring torbernite (q.v.) or cupro-uranite in containing calcium in place of copper.
	www.toprocks.net /MineralList/7/Autunite.asp (523 words)

	Autunite, Page 1
		Autunite is one of the most brilliant fluorescent minerals and is very desirable to collectors.
		From time to time we have Autunite crystals that are free of matrix rock.
		This very large specimen is covered on one side with a thick coating of Autunite crystals.
	www.gothotrocks.com /website/pages/Aut-P1.htm (550 words)

	UCSB Geology-the Bancroft Collection
		Autunite is a calcium uranium phosphate, a so-called uranium "mica" which has weathered from primary uranium ores.
		Autunite is fairly common, and in large accumulations it is mined as a uranium ore. A sample of autunite will contain up to 62 percent UO3.
		Autunite was named after the uranium ore deposit in Autun, France.
	bancroft.geol.ucsb.edu /-Overview/27-Overview.html (136 words)

	DEPENDENCE OF NA-AUTUNITE DISSOLUTION KINETICS ON PH
		autunite and its dehydration products) have been found to precipitate from natural and anthropogenically altered groundwaters possessing minimum uranium concentrations of 10
		M. Additionally, they are thermodynamically stable and generally insoluble over a wide range of geochemical conditions. Because autunite saturation limits the mobility and controls groundwater concentrations of uranium, it is an important solid phase in the geochemical cycling of uranium.
		Precipitation of discrete uranyl-phosphate mineral phases indicates that the concentration of uranium is solubility, rather than sorption, limited. However, previous efforts to quantify key stability data pertinent to understanding the migration of uranium in the subsurface have been limited.
	gsa.confex.com /gsa/2002AM/finalprogram/abstract_41848.htm (395 words)

	Autunite
		I now have a breakdown of the percent of alpha, beta, and gamma and would like to know, considering this new information, what my risks are.
		As you may know, autunite is Ca(UO O, Hydrated Calcium Uranyl Phosphate, and poses and very minimal risk to you.
		Many museums try very hard to maintain the integrity of their good autunite samples.
	hps.org /publicinformation/ate/q1449.html (507 words)

	Autunite from Guilford, Connecticut (Site not responding. Last check: 2007-10-11)
		If you are the guy whose backyard this came from, congratulations on a nice find.
		Autunite is one of the few minerals that is both fluorescent and radioactive.
		This is because the uranyl ion happens to be a fluorescent activator, a property which has nothing to do with the instability of the uranium nucleus.
	www.njminerals.org /autunite.html (155 words)

	Atomic Rocks And Radioactive Specimens
		Uranophane is a hydrated calcium uranium silicate containing silica in place of the phosphate of autunite.
		It is slightly lighter in color and somewhat heavier than autunite (specific gravity 3.85) and has a different crystalline form; it may occur as stains or coatings without apparent crystal form or as finely flbrous or radiating crystal aggregates.
		Schroeckingerite is a complex hydrated sulfate, carbonate, and fluoride of calcium, sodium, and uranium.
	www.atomicrocks.com /html/minerals.html (625 words)

	Autunite
		I now have a breakdown of the percent of alpha, beta, and gamma and would like to know, considering this new information, what my risks are.
		As you may know, autunite is Ca(UO O, Hydrated Calcium Uranyl Phosphate, and poses and very minimal risk to you.
		Many museums try very hard to maintain the integrity of their good autunite samples.
	www.hps.org /publicinformation/ate/q1449.html (484 words)

	Autunite - Brageaud Open Pit, Rossines, Haute-Vienne, France (Site not responding. Last check: 2007-10-11)
		Autunite from Brageaud Open Pit, Rossines, Haute-Vienne, France, France.
		This is by far the most strongly UV fluorescent mineral specimen I have ever seen and I've seen many many specimens of very high grade autunite!
		Buyer must collect of take responsibility for any damage in transit, though every reasonable effort would be made to package it as safely as possible.
	www.treaclemines.co.uk /preview/aut2.htm (93 words)

	Autunite Safety
		The radiation emitted by natural Uranium ores such as Autunite is usually low.
		Normally there is little or no risk associated with these specimens.
		Autunite is a fragile mineral and can crumble easily.
	www.gothotrocks.com /website/pages/safety.htm (352 words)

	Washington Minerals Support and Sales Page
		AUTUNITE SPECIMENS, DAY BREAK MINE, WA I only have a few specimens of autunite from this world class locality in my collection.
		There aren't too many autunite specimens of this size that are preserved from this locality that show the classic crystal habit.
		I was lucky to acquire this specimen in good condition before the preservation process.
	www.washingtonminerals.com /support/supportmysite.html (1185 words)

	DIVALENT TRANSITION METALS AND MAGNESIUM IN STRUCTURES THAT CONTAIN THE AUTUNITE-TYPE SHEET
		Key words: autunite, bassetite, kahlerite, kirchheimerite, lehnerite, metakahlerite, metakirchheimerite, metalodèvite, metanováčekite, metasaléeite, nováčekite I, nováčekite II, saléeite, uranyl phosphate, uranyl arsenate, crystal structure, gel synthesis, hydrothermal synthesis.
		Le feuillet de type autunite possède une composition [(UO = P ou As; il y a partage des coins équatoriaux des bipyramides carrées à uranyle avec les tétraèedres de phosphate ou d’arsenate.
		Mots clés : autunite, bassetite, kahlerite, kirchheimerite, lehnerite, métakahlerite, métakirchheimerite, métalodèvite, métanováčekite, métasaléeite, nováčekite I, nováčekite II, saléeite, phosphate uranylé, arsenate uranylé, structure cristalline, synthèse par gel, synthèse hydrothermale.
	pubs.nrc-cnrc.gc.ca /mineral/tcm-169942-6.html (930 words)

	Re: Bob -Is Autunite photo winner same as Dietz ad? by Roberto on 9/21/2004 (Site not responding. Last check: 2007-10-11)
		Didn't know that pic was still around, and my address has changed a couple of times since then, so if you tried to contact me your messages may have gone lost.
		The specimen is from my collection and I found it 12 years ago in a well-known abandoned prospect where some uranium mining activity ran in the 1950-60s - Bric Colmè, Cuneo province, NW Italy.
		The locality has produced some fine, but always small, autunite and torbernite crystals, and some sample still shows up at local swap meetings.
	www.rockhounds.com /rocknet/archive/messages/34117.shtml (210 words)

	Autunite Page 2
		An extremely large, brilliant, museum quality, specimen of Autunite on Granite matrix.
		A very nice specimen with a thick coating of large Autunite crystal.
		A thin piece of matrix with a blanket of autunite crystals growing on it.
	www.gothotrocks.com /website/pages/AUT-P2.htm (202 words)

	QUT \| ePrints Archive - Raman microscopy of autunite minerals at liquid nitrogen temperature
		Raman microscopy of autunite minerals at liquid nitrogen temperature
		Bands in the Raman spectrum of autunite at 998, 842 and 820 cm-1 are highly polarised.
		Low intensity band at 915 cm-1 is attributed to the ν3 antisymmetric stretching vibration of (UO2)2+ units.
	eprints.qut.edu.au /archive/00000809 (204 words)

	Autunite - LoveToKnow 1911
		Read LoveToKnow 1911:Explanation to get more explanation and see how you can help!
		AUTUNITE, or CALCO-URANITE, a mineral which is one of the "uranium micas," differing from the more commonly occurring torbernite or cupro-uranite in containing calcium in place of copper.
		Autunite is usually found with pitchblende and other uranium minerals, or with ores of silver, tin and iron; it sometimes coats joint-planes in gneiss and pegmatite.
	www.1911encyclopedia.org /A/AU/AUTUNITE.htm (201 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations (Site not responding. Last check: 2007-10-11)
		Autunite minerals have been frequently identified in contaminated sediments as the long-term controlling phase of uranium.
		Under these conditions the mobility of uranium in subsurface pore waters is limited by the rate of dissolution of autunite and meta-autunite group minerals, [(UO2)(PO4)]2 ?
		Data presented here illustrate the significance of pH and dissolved organic material on the dissolution of autunite minerals.
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=876829&query_id=0 (422 words)

	IngentaConnect Raman microscopy of selected autunite minerals (Site not responding. Last check: 2007-10-11)
		Raman spectroscopy at ambient and liquid nitrogen temperature has been used to determine the molecular structure of selected minerals from the autunite and meta-autunite groups.
		Six hydroxyl stretching bands for autunite are observed of which three are highly polarised.
		Bands in the Raman spectrum of autunite at 998, 842 and 820 cm
	www.ingentaconnect.com /content/schweiz/njmm/2004/00002004/00000012/art00003 (150 words)

	Autunite #8-Bell Hill
		Uraniferous opal veinlets 1 cm wide occur in fractures in 38- to 39-m.y.-old rhyolitic ash-flow tuff at the Autunite No. 8 prospect (SW 1/4 sec.
		The areas of most intense mineralization occur in water-laid tuff associated with 21-m.y.-old rhyolite at Spor Mountain, but traces of mineralization are present in tuff interbedded with 6- to 7-m.y.-old rhyolites in the Thomas Range.
		The opal veinlets in the Autunite No. 8 prospect were dated to obtain additional information concerning the age of mineralization and its relationship to volcanism in the Thomas Range.
	www.dangerouslaboratories.org /rut3.html (510 words)

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