
	Where results make sense

Topic: Ferrocolumbite

Related Topics

Niobium

	Rocks & Minerals: Tourmaline discovery at the Cryo-Genie mine: San Diego County California (Site not responding. Last check: 2007-10-09)
		One group of two parallel crystals, measuring 16 x 13 x 3 mm, was found associated with schorl, quartz, and albite in a pocket in the east end of the pegmatite.
		What remains are several irregular subparallel stibiotantalite cores surrounded by vuggy ferrotapiolite and a partial crust of ferrocolumbite (not chemically analyzed), The small vugs are lined by 0.1-mm lustrous dark reddish-brown crystals of ferrotapiolite, in some areas exhibiting uniform crystallographic orientation.
		The ferrocolumbite is present as a crystallographically continuous crust of 0.2-mm dark reddish-brown stepped crystals, which appears to be oriented with respect to the stibiotantalite cores.
	www.findarticles.com /p/articles/mi_m0GDX/is_3_78/ai_100735735/pg_3 (1405 words)

	Ferrocolumbite Mineral Data
		Comments: Blocky, dark brown ferrocolumbite on pale greenish blue amazonite (microcline).
		Comments: Minute brown crystalline grains of baotite in dark ferrocolumbite.
		Grayish white with a brownish tint and reddish internal reflections.
	webmineral.com /data/Ferrocolumbite.shtml (362 words)

	Combined X-ray powder diffraction and DFT calculation to elucidate molecular and crystal structure of fluorostyrenes
		Mutual crystallographic orientation of the lattices of cassiterite and tantaloniobate exsolutions (either ferrocolumbite or wodginite) is as follows (fig.
		Chemical composition of the inclusions is the same as analyzed on the microprobe and corresponds to wodginite and ferrocolumbite, respectively.
		It can be seen that the reciprocal direction [100]* of cassiterite coincides with the [100]* of inclusions (wodginite or ferrocolumbite).
	www.xray.cz /xray/csca/kol2005/abst/klementova.htm (1793 words)

	Mineral Specimen for sale of Ferrocolumbite in Albite from Etta Mine, Keystone District, Pennington County, South ... (Site not responding. Last check: 2007-10-09)
		Ferrocolumbite in Albite from Etta Mine, Keystone District, Pennington County, South Dakota.
		This mineral specimen of Ferrocolumbite in Albite from Etta Mine, Keystone District, Pennington County, South Dakota is available for sale from John Betts - Fine Minerals, mineral dealer located in New York City, New York.
		One ferrocolumbite crystal is fully exposed, others are in fan-shaped groupings exposed on the edge.
	www.johnbetts-fineminerals.com /jhbnyc/gifs/31367.htm (187 words)

	Intergrown niobian rutile phases with Sc- and W-rich ferrocolumbite: An electron-microprobe and Rietveld study -- ...
		Intergrown niobian rutile phases with Sc- and W-rich ferrocolumbite: An electron-microprobe and Rietveld study -- Okrusch et al.
		Intergrown niobian rutile phases with Sc- and W-rich ferrocolumbite: An electron-microprobe and Rietveld study
		cation distribution in the ferrocolumbite was refined on the
	ammin.geoscienceworld.org /cgi/content/abstract/88/7/986 (277 words)

	Cryo-Genie (Site not responding. Last check: 2007-10-09)
		Lepidolite and muscovite are the micas to be found.
		Accessory minerals include cassiterite, amblygonite, ferrocolumbite, apatite, herderite, stibiotantalite, pollucite, scorodite, ferrotapiolite and lollingite.
		The very rare mineral paakkonenite has been found here, only the fourth locality in the world this mineral is known to exist.
	members.cox.net /j_bean/rocks/locales/cryogenie/cryo1.htm (250 words)

	AGT Photos (Site not responding. Last check: 2007-10-09)
		(a) Essentially homogeneous ferrotantalite with faint oscillatory zonation and patchy (relatively Nb-rich) ferrocolumbite near the upper margin.
		(b) Euhedral oscillatory zoned (mainly) ferrocolumbite exhibiting irregular and discontinuous patterns indicating many episodes of dissolution that have led to truncated layers and angular unconformities.
		(c) Oscillatory zonation in subhedral crystals with ferrocolumbite cores and ferrotantalite margins.
	www.open.ac.uk /earth-research/tindle/AGTWebPages/AGTCT1.html (116 words)

	Rocks & Minerals: 26th Rochester Mineralogical Symposium: Contributed Papers in Specimen Mineralogy Part 1 (Site not responding. Last check: 2007-10-09)
		Ferrocolumbite and a tantalum-rich ferrocolumbite occur as thick tabular crystals up to 3 mm in length in and near albitized zones in several small pegmatites.
		Ferrocolumbite is overgrown by a bright yellow U-Nb oxide, which is completely metamict but yields, after recrystallization for twelve hours at 900 [degrees] C in an atmosphere of 95% Ar and 5% [H.sub.2], an X-ray diffraction pattern showing similarity to liandratite and petschekite.
		A uranium member of the pyrochlore group occurs as brown to brick-red, millimeter-sized grains in albitized zones.
	www.findarticles.com /p/articles/mi_m0GDX/is_3_75/ai_62214072 (1106 words)

	TSX Venture Exchange Trading Symbol - CCE - Mineral Processing and Metallurgical Testing Commences - Thu Nov 17, 2005
		Detailed exploration of the Verity Carbonatite, including geochemical, mineralogical, and petrological work by Dr. Anthony Mariano (1979, 1982, 2001), has shown the dominant tantalum bearing phase at Verity to be pyrochlore, although confined areas with valuable element concentration, including "massive concentrations" (Mariano, 1982) of ferrocolumbite, fersmite and pyrochlore, are noted.
		A resource for the Fir Carbonatite has yet to be delineated by an independent third party, in accordance with National Instrument 43-101.
		At the Fir Carbonatite, the dominant tantalum-bearing phase is ferrocolumbite with lesser pyrochlore in a ratio of approximately 20 : 1 (columbite : pyrochlore) (Mariano, 1982).
	www.commerceresources.com /s/NewsReleases.asp?ReportID=28267 (583 words)

	TSX Venture Exchange Trading Symbol - CCE - Metallurgical Test Work Commences - Thu Nov 17, 2005
		Characteristics of the Fir and Verity carbonatite material may allow for a cost-effective process to concentrate the minerals.
		c) the tantalum and niobium ore minerals (Pyrochlore and FerroColumbite) are relatively coarse-grained, with individual crystals up to 3 cm diameter.
		The magnetic properties of ferro-columbite and the electrostatic properties of pyrochlore are to be investigated as further methods for concentration and recovery of these minerals.
	www.commerceresources.com /s/NewsReleases.asp?ReportID=38671 (492 words)

	AGT Photos (Site not responding. Last check: 2007-10-09)
		(a) Essentially homogeneous ferrocolumbite (at top) with patchy (relatively Nb-rich) ferrocolumbite developed towards the margin of the crystal.
		Apatite-Li mica-cleavelandite pod in SW subgroup beryl pegmatite.
		(c) Patchy zoned crystal with variable ferrocolumbite (dark) and manganocolumbite (light) composition - inclusion in Li mica from wall-zone of Mn-suite eastern subgroup petalite pegmatite; Marko's.
	www.open.ac.uk /earth-research/tindle/AGTWebPages/AGTCT2.html (121 words)

	Alan Guisewite's Mineral Collection Images: Miscellaneous Systematic Oxides Page
		A thumbnail chunky ferrocolumbite (iron metaniobate, now iron niobium mixed oxide) crystal collected in 1996 from the Coats Mine, Petaca district, Rio Arriba County, New Mexico.
		A thumbnail of rare (for the locality) manganocolumbite (once a manganese metaniobate, but now a mixed oxide of manganese, iron, niobium, and tantalum) from the Dunton Quarry, Plumbago Mountain, Newry, Oxford County, Maine.
		It forms a complete series with manganotantalite and ferrocolumbite and an incomplete series with magnocolumbite.
	www-2.cs.cmu.edu /~adg/adg-psoimages.html (6328 words)

	Coltan / Columbite-Tantalite from READE
		Coltan, columbite- tantalite,, ferrotantalita, ferrocolumbite, ferrotantalite, manganocolumbite, manganotantalite, stibiocolumbite, stibiotantalite, Coltan, columbite- tantalite,, ferrotantalita, ferrocolumbite, ferrotantalite, manganocolumbite, manganotantalite, stibiocolumbite, stibiotantalite
		Columbite-tantalite — coltan for short — is a dull metallic ore found in major quantities in the eastern areas of Congo.
		Coltan, columbite- tantalite,, ferrotantalita, ferrocolumbite, ferrotantalite, manganocolumbite, manganotantalite, stibiocolumbite, stibiotantalite, Coltan, columbite- tantalite,, ferrotantalita, ferrocolumbite, ferrotantalite, manganocolumbite, manganotantalite, stibiocolumbite, stibiotantalite, Coltan, columbite- tantalite,, ferrotantalita, ferrocolumbite, ferrotantalite, manganocolumbite, manganotantalite, stibiocolumbite, stibiotantalite, Coltan, columbite- tantalite,, ferrotantalita, ferrocolumbite, ferrotantalite, manganocolumbite, manganotantalite, stibiocolumbite, stibiotantalite
	www.reade.com /Products/Minerals_and_Ores/coltan_columbite-tantalite.html (325 words)

	Ferrocolumbite (Site not responding. Last check: 2007-10-09)
		A single skeletal ferrocolumbite crystal intergrown with oligoclase feldspar.
		Maximum dimension of the ferrocolumbite crystal is 8.5cm.
		The small brown patches between limbs of the ferrocolumbite crystal are small muscovite grains.
	www.mindat.org /picshow.php?id=4316 (182 words)

	COLUMBITE (Iron Manganese Magnesium Niobium Tantalum Oxide)
		The iron, manganese and magnesium amounts vary considerably without much effect on properties.
		However the end members are recognized as distinct minerals although collectors have found this to be rather cumbersome and generally prefer columbite to the non-unique names of ferrocolumbite, manganocolumbite and magnocolumbite.
		As mineral specimens, columbite can be a nice addition to one's collection.
	mineral.galleries.com /minerals/oxides/columbit/columbit.htm (463 words)

	SYSTEMATIC MINERALS
		FERROCOLUMBITE — Etta Mine, near Keystone, Pennington County, South Dakota
		FERROCOLUMBITE — Golconda, State of Minas Gerais, Brazil
		FERROCOLUMBITE — Virgem de Lapa Pegmatite, State of Minas Gerais, Brazil
	www.minresco.com /syst/f.htm (670 words)

	beryl.pit
		QUK-8, simple tabular fl metallic crystals, rarely sharply formed and well terminated, to a few mm, often coated with QUK-4, freestanding crystals in vugs and also minute embedded masses, in vuggy white albite, is likely ferrocolumbite.
		Noted by Ellsworth in his 1927 Am.Min.description of lyndochite as occurring as intimate scattered intergrowths in lyndochite xls, observed in polished section.
		Perhaps something from the pyrochlore group, like betafite, microlite, pyrochlore, or uranpyrochlore, which are common in other pegs in the area.
	www.ontariominerals.com /berylpit.htm (5775 words)

	Columbite--Adamsminerals.com--Your online mineral specimen resource --Minerals A-E (Site not responding. Last check: 2007-10-09)
		FRC-10 Columbite var Ferrocolumbite--St Peters's Dome, CO--Nice showy 2+cm ferrocolumbite specimen.
		Please feel free to click our tabs above to browse minerals by name.
		For more up to date localities email me at adam@nospamadamsminerals.com.
	www.adamsminerals.com /columbite.htm (34 words)

	Photo gallery of oxide minerals: Hematite, Magnetite, Corundum, Ruby, Bixbyite, Brookite, Spinel, etc.
		Included in this group are Betafite, Bixbyite, Brookite, Cassiterite, Chrysoberyl, Columbite, Corundum, Ruby, Sapphire, Cuprite, Diaspore, Euxenite, Ferrocolumbite, Franklinite, Goethite, Hausmannite, Hematite, Ilmenite, Ishikawaite, Latrappite, Magnetite, Lueshite, Manganite, Manganotantalite, Microlite, Psilomelane, Pyrolusite, Rutile, Samarskite, Senarmontite, Spinel, Tantalite, Thorianite, Uraninite, Yttrotantalite, Zincite.
		To purchase mineral specimens, go to the online order form.
		#31367, Ferrocolumbite in Albite, Etta Mine, South Dakota (m) $65
	www.johnbetts-fineminerals.com /jhbnyc/oxides.htm (297 words)

Try your search on: Qwika (all wikis)