1	-	Uher, Pavel, Černý, Petr, Chapman, Ron (2008) Foordite-thoreaulite, Sn2+Nb2O6Sn2+Ta2O6: compositional variations and alteration products. European Journal of Mineralogy, 20 (4) 501-516 doi:10.1127/0935-1221/2008/0020-1845

Comments:

Daltry and von Knorring (1998): "it occurs in contact with stannoan plumbomicrolite, cassiterite, ferro-columbite, staringite, and ixiolite. Foordite from Lutsiro is in fact a lead-bearing variety."

Colour:

brownish yellow with a greenish tint

Confirmation

Validity:

Valid - Type Locality

Data

Mineral Data:

Click here to view Foordite data

Locality Data:

Click here to view Lutsiro, Sebeya river, Kabaya, Ngororero District, Western Province, Rwanda

Data Identifiers

Mindat Occurrence Record ID:

5363

Long-form Identifier:

1:3:5363:1

GUID (UUID V4):

ef5ea4e2-ebf5-4d57-bcae-2325640e68c5

References

Jambor, John L., Vanko, David A. (1990) New Mineral Names. American Mineralogist, 75 (5-6) 706-713 p.707

Daltry, V.D.C. and von Knorring, O. (1998) Type-mineralogy of Rwanda with particular reference to the Buranga pegmatite. Geologica Belgica: 1: 9-15.

Uher, Pavel, Černý, Petr, Chapman, Ron (2008) Foordite-thoreaulite, Sn2+Nb2O6Sn2+Ta2O6: compositional variations and alteration products. European Journal of Mineralogy, 20 (4) 501-516 doi:10.1127/0935-1221/2008/0020-1845

Reference Search (possible matching items)

	*(2023) Foordite. Handbook of Mineralogy. Mineralogical Society of America*	Report (issue)
	Sn2+ (Nb, Ta)2O6 Foordite c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Monoclinic....879 c = 5.556–5.562 X-ray Powder Pattern: Lutsiro, Rwanda; close to thoreaulite. 2.849 (100), 3.100 (50)...45.23 27.57 Total 100.2 100.2 100.00 (1) Lutsiro, Rwanda; by electron microprobe, total Sn as SnO; corresponding...conditions deficient in Fe, Mn, Na, Ca, and F (Lutsiro, Rwanda). Association: Ferrocolumbite, cassiterite...ixiolite (Lutsiro, Rwanda). Distribution: From about 15 km north-northwest of Lutsiro, near the Sebeya River
	Uher, Pavel, Černý, Petr, Chapman, Ron (2008) Foordite-thoreaulite, Sn2+Nb2O6Sn2+Ta2O6: compositional variations and alteration products. European Journal of Mineralogy, 20 (4) 501-516 doi:10.1127/0935-1221/2008/0020-1845	Journal (article/letter/editorial)
	Pagmatites: the State of the Art”, Porto, May 2007 Foordite-thoreaulite, Sn2+ Nb2O6 –Sn2+ Ta2O6 : compositional...Manitoba, Winnipeg, MB, Canada R3T 2N2 Abstract: The foordite-thoreaulite series of Sn2+ -bearing Nb, Ta-oxide...(EMPA) reveal a broad range of nearly continuous foordite-thoreaulite solid solution: at. Ta/(Ta+Nb) = 0...2+ 5+ 2+ 3+ stitution mechanisms dominate the foordite-thoreaulite chemistry: NbTa−1 , Pb2+ Sn2+ −1 and...positive correlation with Ta/(Ta+Nb). Primary large foordite-thoreaulite crystals are compositionaly homogeneous
	*Modreski, Peter J. (1998) Who's Who in Mineral Names. Rocks & Minerals, 73 (3) 202-205 doi:10.1080/00357529809603036*	Journal (article/letter/editorial)
	of the San Diego Tourmaline mine, Mesa Grande district, San Diego County, California, during 1986 International...Association Meeting field trip. 202 ROCKS & MINERALS Foordite, (Sn2+,Pb)(Nb,Ta),06, was named for Dr. Eugene...ferrocolumbite in an alluvial pebble from Lutsiro, Sebeya River, Rwanda, and also from Punia, Zaire. Naming...study of the Himalaya dike system, Mesa Grande district, San Diego County, California, and its gem tourmaline...Fransolet, T. S. Ercit, and R. Chapman. 1988. Foordite, SnNb,O,, a new mineral species, and the foorditethoreaulite
	*Jambor, John L., Vanko, David A. (1990) New Mineral Names. American Mineralogist, 75 (5-6) 706-713*	Journal (article/letter/editorial)
	along the Sebeya crystal-structure refinement, the formula is (Caour- River near Lutsiro in western Rwanda...refined to R : l.6010.The mineral oc- Survey. Foordite forms a series with thoreaulite, Sncurs as dark...brown-black, subhedral to anhedral grains TarOu.Type foordite is in the mineralogical collection of up to 2...translucent,vitreous bladesand translucentsilky Foordite* fibersup to I mm long and 0.2 mm wide, elongate[001]...streak, brittle, H : 3.5, good cleavageparallel to Foordite SnNbrOu,a new mineral species,and the foorl],
	*Cairncross, Bruce (2019) Minerals & Gemstones of East Africa* - Burundi, Kenya, Rwanda, Tanzania and Uganda. Penguin Random House.**	Book
	MINERALS& GEMSTONES of East Africa Burundi, Kenya, Rwanda, Tanzania and Uganda Bruce Cairncross Published...East African resources 12 Burundi 13 Kenya 14 Rwanda 16 Tanzania 17 Uganda 20 Gemological properties...is not commonly known that neighbouring Uganda, Rwanda and Burundi are also sources of some interesting...the gem-quality tourmaline that can be found in Rwanda). Literature on the subject is limited; the previous...of the five featured countries - Burundi, Kenya, Rwanda, Tanzania and Uganda - and introduces the reader
	*Kristiansen, Roy (2001) Sjeldne tantalniobater fra Sentral-frika. Eksotiske minerallokaliteter II . STEIN. Nordisk magasin for populær geologi, 28 (2) 21-28*	Journal (article/letter/editorial)
	Kivu sjoen , som Iigger i grensen mellom Zaire og Rwanda. Dette er den heyest beliggende inn sje pa det...Sebeyaelven i det vestlige Ruanda, ca 15 km NNV for Lutsiro. Materialet stammer opprinnelig fra pegmatitter...Cerny, P. et a1. 1988. Foordite .Snblb.Oj, a new minera l speci es, and the foordite-thoreaulite ser ies
	*Clark, A. M., Tandy, P. C. (1990) Thirty-sixth list of new mineral names. Mineralogical Magazine, 54 (377) 661-671 doi:10.1180/minmag.1990.054.377.24*	Journal (article/letter/editorial)
	190.40 ~ y 1.694. Named for the Aravaipa mining district in which the mine is located. Arupite. V. F. Buchwald...Colourless platy crystals in fenitized sandstone in the western contact zone of the Burpa- Mineralogical Magazine...of the Karnasurt and Alluayv Mountains and the River Chinglusuay, Kola Peninsula, USSR. Formula near...Norberg Lakes region, Fresno County, California, district, Sweden. The mineral was called 'magUSA. Ideal...Zhurn. 11, no. 5, 88. SpheruLeogang, Salzburg Province, Austria. Ideal forlitic aggregates of colourless
	*(2001) STEIN. Nordisk magasin for populær geologi* Vol. 28 (2) Norske Amatørgeologers Sammenslutning**	Journal (issue)
	Kivu sjoen , som Iigger i grensen mellom Zaire og Rwanda. Dette er den heyest beliggende inn sje pa det...Sebeyaelven i det vestlige Ruanda, ca 15 km NNV for Lutsiro. Materialet stammer opprinnelig fra pegmatitter...Cerny, P. et a1. 1988. Foordite .Snblb.Oj, a new minera l speci es, and the foordite-thoreaulite ser ies...timer kjoring til en liten gru velandsby, Gui zhou Province Tongeen. Motte sa lokalbefolkningen pa dette lille...norske kro- 31 Orpiment krystaller i (Hunan province) . Realgar i Shimen ( Hunan provin ce) . ner)
	*Pracejus, Bernhard - Ed.* (2014) The Ore Minerals Under the Microscope (2nd ed.) Elsevier. doi:10.1016/c2012-0-01360-9**	Book (edition)
	Bismutotantalite Oldhamite Spinel Valentinite Foordite Smithsonite Sussexite Reflection Colour &...internal reflections); Madenköy Mine, Çayeli, Rize Province, Black Sea Region, Turkey (sample: Halbach); XPL...grey; arg); Monte Narba Mine, San Vito, Cagliari Province, Sardinia, Italy; PPL B Same sample as above:...grey); Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Sachsen, Germany (sample: Seifert);...Carletonville, Western Sector, Far West Rand (West Wits Line), Witwatersrand field, Gauteng Province, South Africa;
	*Nickel, Ernest H., Nichols, Monte C. (1991) Mineral Reference Manual. Van Nostrand Reinhold, New York.*	Book
	Semi-metallic/adamantine pink-purple, reddish-brown. Green River Formation, Uintah Co., Utah, USA. H= < 3, Dj4j=... Pearly white, greyish, greenish-white. Kipawa River, Timiskaming Co., Quebec, Canada. H= 5.5, Djjj=...Lustrous black. Wilagedera prospect. North Western Province, Sri Lanka. H= 3-4, 0^= 3.94, Dg= 3.97, VIIIE...Lustrous black. Wilagedera prospect. North Western Province, Sri Lanka. H= 3-4, Djjj= 3.94, D(.= 4.22...silvery-grey in reflected light. Bolshoi Anyui River basin, USSR (NE). 11=3.2, Djjj=?, D(.= 13.49, lA
	*Blackburn, William H., Dennen, William H. (1997) Encyclopedia of Mineral Names* - Special Publication No. 1. The Canadian Mineralogist, Ottawa.**	Book
	pioneering work in organic geochemistry. Green River Formation, Uinta County, Utah, U.S.A. Trudell, L...L.C. (1970): Lithologic Description of Western Oil Shale Corporation Project Utah EX—]. Laramie Petroteum...(1989): Mineral. J. 14, 279. Flores mine, Huanuni District, Oruru, Bolivia. Agardite-(La) (La,Ca)Cu¢(AsO4)3(OH)6°3H20...name is derived from its occurrence at the Achates River (now Drillo) in southwestern Sicily. Mohs (1804)...Caria, an ancient country south of the Meander River in SW Asia Minor, from whence came the “alabandic
	*(1990, March) Mineralogical Abstracts* Vol. 41 (1) The Mineralogical Society of Great Britain and the Mineralogical Society of America**	Journal (issue)
	the Blekinge province is not a southerly continuation o f the Svccokarclian orogenic province o f central...t can be correlated with the SW Swedish gneiss province, formed 1800-1650 m.y. ago. Rb-Sr whole-rock isochron...extent o f the L a i t i l a rapakivi batholith i n western Finland. M . Vaasjoki, P. Pihlaja & M . Sakko,...dyke, o f the North Atlantic Tertiary igneous province, range f r o m 4 3 . 8 t o 6 2 . 6 m . y. Interpreted...mineralizing activity in the St Andreasherg 01 district (southwest H a r z , F e d e r a l Republic o
	*Bernard, Jan, Hyršl, Jaroslav (2004) Minerals and their Localities* (1st ed.) Granit, Prague.**	Book (edition)
	expressed in abbreviations: Rep. (republic), prov. (province), co. (county), munic. (municipio), pref. (prefecture)...dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g....Mt. (mount or mountain), Mts. (mountains), R. (river), Is. (island), Vole. (volcano), Penin. (peninsula)...the revolution in 1997. Its mineral rich Katanga province was renamed Shaba by Mobutu, and is now the Katanga...Katanga administrative region again. The former Kivu province is now divided to three regions: INTRODUCTION
	*Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy* (8th ed.) Wiley-Interscience. p.1872**	Book (edition)
	British Columbia NF Labrador (part of Newfoundland Province) MB Manitoba NB New Brunswick NF Newfoundland...Territory Queensland South Australia Tasmania Victoria Western Australia States, Mexico Aguascaientes Baja California...Co., Bonanza mine, Trinity Co., Michigan Bluff district, Placer Co., in AK, placers at Fairbanks, Iditarod...and quartz veins at Juneau. In Canada, Noranda district, PQ; Porcupine, Kirkland Lake, and Larder Lake...deposits, ON; Atlin and Caribou, BC; and Klondike district, YT. In Mexico, Altar and Magdalena, SON; Parral
	*Clark, A. M. (1993) Hey's Mineral Index* - Mineral Species, Varieties and Synonyms (3rd ed.) Natural History Museum, London.**	Book (edition)
	75'. 1 79.57'. Z= I [PDF 29-20021. From the Green River Formation in (TL) Uintah Co .. Utah. USA. Named...(TL) Achtaragda (or Achtarynd.a ). trib. of Yilui river. Siberia. USSR. Named for locality. An aggregate...distinct banding. Named for an occurrence on the River Achates Axa'TTJ� in Sicily. although the nan1c achates...P. Butuzov ( 1 950 Ibid.) 79. 28. (TL) Aidyrly river. Urals. USSR. Named for locality. Aidyrlyit. mis-translitcration...unnecessary name. given for locality, (TL) Alazani river. Georgia. USSR. Albanite. organic material. C.I

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Foordite from Lutsiro, Sebeya river, Kabaya, Ngororero District, Western Province, Rwanda

Foordite from
Lutsiro, Sebeya river, Kabaya, Ngororero District, Western Province, Rwanda