NationMaster - Encyclopedia: Ferrocolumbite

Ferrocolumbite, also called niobite, niobite-tantalite, columbate and columbite [(Fe, Mn)(Nb, Ta)₂O₆] is a black mineral that is an ore of niobium and tantalum. It has a submetallic luster and a high specific gravity and is a niobate of iron and manganese, containing tantalate of iron. This mineral was first found at Haddam, Middlesex County, Connecticut in New England, USA. It forms a series with the tantalum-dominant analogue Ferrotantalite and one with the manganese-dominant analogue Manganocolumbite. General Name, symbol, number iron, Fe, 26 Chemical series transition metals Group, period, block 8, 4, d Appearance lustrous metallic with a grayish tinge Standard atomic weight 55. ... General Name, symbol, number manganese, Mn, 25 Chemical series transition metals Group, period, block 7, 4, d Appearance silvery metallic Standard atomic weight 54. ... General Name, Symbol, Number niobium, Nb, 41 Chemical series transition metals Group, Period, Block 5, 5, d Appearance gray metallic Standard atomic weight 92. ... General Name, Symbol, Number tantalum, Ta, 73 Chemical series transition metals Group, Period, Block 5, 6, d Appearance gray blue Standard atomic weight 180. ... This article is about the chemical element and its most stable form, or dioxygen. ... For other uses, see Mineral (disambiguation). ... General Name, Symbol, Number niobium, Nb, 41 Chemical series transition metals Group, Period, Block 5, 5, d Appearance gray metallic Standard atomic weight 92. ... General Name, Symbol, Number tantalum, Ta, 73 Chemical series transition metals Group, Period, Block 5, 6, d Appearance gray blue Standard atomic weight 180. ... Lustre (American English: luster) is a description of the way light interacts with the surface of a crystal, rock or mineral. ... Relative density (also known as specific gravity) is a measure of the density of a material. ... General Name, symbol, number iron, Fe, 26 Chemical series transition metals Group, period, block 8, 4, d Appearance lustrous metallic with a grayish tinge Standard atomic weight 55. ... General Name, symbol, number manganese, Mn, 25 Chemical series transition metals Group, period, block 7, 4, d Appearance silvery metallic Standard atomic weight 54. ... This article is about the region in the United States of America. ... General Name, Symbol, Number tantalum, Ta, 73 Chemical series transition metals Group, Period, Block 5, 6, d Appearance gray blue Standard atomic weight 180. ... Ferrotantalite, (Fe, Mn)(Ta, Nb)2O6 is a black mineral that is an ore of niobium and tantalum. ...

Uses

Ferrocolumbite is a natural oxide of niobium, tantalum, ferrous iron, and manganese. Some tin and tungsten may be present in the mineral. Used for its heat resistancy.

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2008 (MMVIII) is the current year, a leap year that started on Tuesday of the Anno Domini (or common era), in accordance to the Gregorian calendar. ... is the 33rd day of the year in the Gregorian calendar. ... General Name, symbol, number manganese, Mn, 25 Chemical series transition metals Group, period, block 7, 4, d Appearance silvery metallic Standard atomic weight 54. ... For other uses, see Mineral (disambiguation). ... Borates in chemistry are chemical compounds containing boron bonded to three oxygen atoms written as B(OR)3. ... Sussexite is a borate mineral MnBO2(OH). ... Tusionite also known as tusionit is a colorless to yellow brown trigonal mineral whos chemical formula is MnSn(BO3)2. ... Ball-and-stick model of the carbonate ion, CO32âˆ’ For other meanings, see Carbonate (disambiguation) In chemistry, a carbonate is a salt or ester of carbonic acid. ... Ankerite is a calcium, iron, magnesium, manganese carbonate mineral of the dolomite family with formula: Ca(Fe,Mg,Mn)(CO3)2. ... Kutnohorite is a rare calcium manganese magnesium iron carbonate mineral with formula Ca(Mn,Mg,Fe)(CO3)2. ... Rhodochrosite from Sweet Home Mine, Alma, Colorado, USA Pink is the most common color of Rhodochrosite. ... An oxide is a chemical compound containing at least one oxygen atom and other elements. ... Birnessite (Na0. ... Bixbyite is a manganese iron oxide mineral with formula: (Fe,Mn)2O3. ... Ferrotantalite, (Fe, Mn)(Ta, Nb)2O6 is a black mineral that is an ore of niobium and tantalum. ... Galaxite is a mineral with the chemical formula (Mn,Fe,Mg)(Al,Fe)2O4. ... Hausmannite is a complex oxide of manganese containing both di- and tri-valent manganese. ... This article needs to be cleaned up to conform to a higher standard of quality. ... Jacobsite is a manganese iron oxide mineral. ... Manganite is a mineral consisting of manganese oxide hydroxide, MnO(OH), crystallizing in the orthorhombic system and isomorphous with diaspore and goethite. ... Manganotantalite from Alto do Giz, RN, Brazil Manganotantalite (MnTa2O6) is the Manganese (Mn) pure member of the Columbite-Tantalite serie. ... Nsutite is a manganese oxide mineral with formula: (Mn3+1-xMn2+xO2-2x(OH)2x where x = 0. ... Psilomelane is a group name for hard black manganeese oxides (Hollandite, Romanechite, etc)Mindat. ... Pyrolusite is a mineral consisting essentially of manganese dioxide (MnO2) and is important as an ore of manganese. ... RomanÃ¨chite ((Ba,H2O)2(Mn+4,Mn+3)5O10) is the primary constituent of psilomelane, which is a mixture of minerals. ... Tantalite, [(Fe, Mn) Ta2O6], is a mineral that is close to columbite. ... Todorokite is a rare complex hydrous manganese oxide mineral with formula: (Mn,Mg,Ca,Ba,K,Na)2Mn3O12Â·3H2O. It is a brown to black monoclinic mineral which occurs in massive or tuberose forms. ... Raw umber Umber is a natural brown clay pigment which contains iron and manganese oxides. ... Wolframite (Fe,Mn)WO4, is an iron manganese tungstate mineral that is the intermediate between ferberite (Fe2+ rich) and huebernite (Mn2+ rich). ... A phosphate, in inorganic chemistry, is a salt of phosphoric acid. ... Childrenite sample. ... Graftonite is an iron(II), manganese, calcium phosphate mineral with formula: (Fe++,Mn,Ca)3(PO4)2. ... Lithiophilite is a mineral containing the element lithium. ... Natrophilite is a mineral with the chemical formula NaMnPO4. ... Purpurite is a mineral, basically Manganese Phosphate, MnPO4 although with varying amounts of iron depending upon the source of the mineral. ... Triplite (Mn,Fe2+)2(PO4)(F,OH) is a rare mineral that forms in phosphate-rich granitic, pegmatites typically as iregular brown opaque masses. ... Triploidite is a mineral, a phosphate of iron and manganese, formula (MnFe)2(OH)(PO4). ... Zanazziite is a mineral, a complex phosphate with the formula Ca2(MgFe)(MgFeMnAl)4Be(OH)4(PO4)6. ... In chemistry, a silicate is a compound containing an anion in which one or more central silicon atoms are surrounded by electronegative ligands. ... Babingtonite is a calcium iron manganese inosilicate mineral with the formula Ca2(Fe,Mn)FeSi5O14(OH). ... Bixbite (also known as red beryl, red emerald, or scarlet emerald) is a red variety of beryl (emerald), Be3(Al,Mn)2(SiO3)6. ... Braunite is a grey/black mineral, an oxide of manganese, named after Mr. ... Calderite is a mineral in the garnet group with the chemical formula (Mn2+,Ca)3(Fe3+,Al)2(SiO4)3. ... Chloritoid is a silicate mineral of metamorphic origin. ... Eudialyte is a mineral, Na4(Ca, Ce, Fe, Mn)2ZrSi6O17(OH, Cl)2. ... Jeffersonite is a dark green mineral, a Manganese Zinc enriched form of Augite, sometimes compared to Aegerine. ... Knebelite is a mineral, a variety of Fayolite containing Manganese. ... Ottrelite is a form of chloritoid. ... Pyroxferroite (Fe+2,Mn,Ca)SiO3 is a silicate of the pyroxene group with a triclinic crystal structure. ... Rhodonite crystals in rock A piece of rounded rhodonite Rhodonite is a member of the pyroxene group of minerals, consisting of manganese inosilicate, (Mn,Fe,Mg,Ca)SiO3, and crystallizing in the triclinic system. ... Spessartine is a kind of garnet. ... Sugilite tile Sugilite (also known as luvulite) is a relatively rare pink to purple cyclosilicate mineral with the complex chemical formula: KNa2(Fe,Mn,Al)2Li3Si12O30. ... Tephroite is a non-metalic mineral that is one of the unusual minerals found at the famous mines of Sterling Hill and Franklin, New Jersey, USA. It can also be found in England and Sweden. ... Zakharovite is a mineral, a silicate of sodium and manganese; formula Na4Mn5Si10O20(OH)6. ... Zircophyllite is a complex mineral, formula (KNa)3(MnFe)7(ZrTi)2Si8)24(O,OH,F)7. ... Formally, sulfide is the dianion, S2âˆ’, which exists in strongly alkaline aqueous solutions formed from H2S or alkali metal salts such as Li2S, Na2S, and K2S. Sulfide is exceptionally basic and, with a pKa > 14, it does not exist in appreciable concentrations even in highly alkaline water. ... Hauerite MnS2 Manganese sulphide. ... Rambergite is a manganese sulfide mineral with formula MnS. It has been found in anoxic marine sediments, rich in organic matter and also in skarn in Sweden. ... Axinite is a brown to violet-brown, or reddish-brown bladed mineral composed of calcium aluminum boro-silicate, (Ca,Fe,Mn)3Al2BO3Si4O12OH. Axinite is pyroelectric and piezoelectric. ... Geigerite is a mineral, a complex hydrous manganese arsenate with formula: Mn5(AsO3OH)2(AsO4)2Â·10H2O. It forms triclinic pinacoidal vitreous colorless, red to brown crystals. ... The arsenate ion is AsO43-. An arsenate (compound) is some compound that contains this ion. ... Polymetallic nodules, also called manganese nodules, are rock concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core. ... Zincobotryogen is a mineral; formula (ZnMgMn)Fe3+(SO4)2. ... The sulfate anion, SO42âˆ’ The structure and bonding of the sulfate ion In inorganic chemistry, a sulfate (IUPAC-recommended spelling; also sulphate in British English) is a salt of sulfuric acid. ...

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