Mineral Species containing Iron (Fe)

Element Properties, Isotopic Compositions for Iron

**Iron (Fe) Element Properties**
Atomic Mass	55.847
Atomic Number	26
Name Origins	Anglo-Saxon, iron; Latin, ferrum.
Year Discovered	Prehistoric.
Discovery Credits	Known to ancient civilizations.
Remarks	When pure, iron is lustrous, and soft (workable). Most important of all metals, used principally as steel alloys. Rusts in damp air, dissolves in dilute acids. Diagnostic tests: The borax bead test in the oxidizing flame gives yellow to brownish red color while hot and is colorless to yellow when cold. Reducing flame gives a bottle green color. A magnetic mass is obtained if the mineral is powdered, mixed with soda (Na₂CO₃), and fused in a reducing flame (Note, cobalt and nickel also yield magnetic masses). In solution, iron will precipitate as Fe(OH)₃ when excess amounts of NH₄OH are added.
References	Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.
See Also	WebElements, ChemiCool

**Naturally Occurring Isotopes**
Symbol	Isotope Mass	Isotope Nuclide Number	Isotope Number	Natural Abundance	Half-life Units
Fe	53.939612	54	26	5.8200%	Stable
Fe	55.934939	56	26	91.1800%	Stable
Fe	56.935396	57	26	2.1200%	Stable
Fe	57.933277	58	26	0.8800%	Stable

Iron (Fe) Minerals sorted by Descending Weight Percent

Click here for List sorted by Mineral Name

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**1434 Minerals containing Iron (Fe) sorted by Descending Weight Percent**
% Fe	Mineral Name	Chemical Formula	MW
21.23 % Fe	Kornelite #	Fe+++2(SO4)3·7(H2O)	525.99
21.22 % Fe	Ferrokinoshitalite !	(Ba,K)(Fe++,Mg)3(Si2Al2)O10 (OH,F)2	526.29
21.18 % Fe	Hagendorfite #	NaCaMn(Fe++,Fe+++,Mg)2(PO4)3	501.07
21.17 % Fe	Kamiokite	Fe2Mo3O8	527.51
21.17 % Fe	Ferricopiapite #	Fe+++2/3Fe+++4(SO4)6(OH)2·20(H2O)	1,231.32
21.15 % Fe	Bonaccordite	Ni2Fe+++BO5	264.03
21.12 % Fe	Gormanite	Fe++3Al4(PO4)4(OH)6·2(H2O)	793.43
21.11 % Fe	Fluorarrojadite-(BaFe) !	(Ba,K,Pb)Na3(Ca,Sr)(Fe++,Mg,Mn)14Al(PO4)11(PO3OH)(F,OH)2	2,116.63
21.03 % Fe	Niobophyllite	K2Na(Fe++,Mn)7(Nb,Ti)2Si8O26(OH)4(F,O)	1,394.28
21.02 % Fe	Arthurite	CuFe+++2(AsO4,PO4,SO4)2(O,OH)2·4(H2O)	531.49
20.99 % Fe	Sabieite	(NH4)Fe+++(SO4)2	266.01
20.96 % Fe	Sonoraite	Fe+++Te++++O3(OH)·(H2O)	266.47
20.93 % Fe	Brownmillerite	Ca2(Al,Fe+++)2O5	240.09
20.92 % Fe	Romerite #	Fe++Fe+++2(SO4)4·14(H2O)	798.11
20.89 % Fe	Stewartite #	Mn++Fe+++2(PO4)2(OH)2·8(H2O)	534.71
20.89 % Fe	Laueite #	Mn++Fe+++2(PO4)2(OH)2·8(H2O)	534.71
20.87 % Fe	Arrojadite-(BaNa) !	BaFe++Na2Ca(Fe++,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2	2,141.18
20.66 % Fe	Hydromolysite ?	FeCl3·6(H2O)	270.30
20.61 % Fe	Cleusonite !	Pb(U++++,U++++++)(Ti,Fe++,Fe+++)20(O,OH)38	2,080.74
20.61 % Fe	Ferri-arrojadite-(BaNa) !	BaFe++Na2Ca(Fe++,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2	2,167.47
20.61 % Fe	Eldfellite	NaFe(SO4)2	270.96
20.57 % Fe	Howardevansite	NaCu++Fe+++2(VO4)3	543.05
20.52 % Fe	Senaite #	Pb(Ti,Fe,Mn)21O38	1,904.66
20.46 % Fe	Johnsomervilleite	Na2Ca(Mg,Fe++,Mn)7(PO4)6	955.37
20.44 % Fe	Tuhualite #	[ ](Na,K)Fe++Fe+++[Si6O15]	546.41
20.30 % Fe	Perryite	(Ni,Fe)8(Si,P)3	550.26
20.24 % Fe	Lyonsite	Cu++3Fe+++4(VO4)6	1,103.66
20.19 % Fe	Natanite	Fe++Sn++++(OH)6	276.60
20.18 % Fe	Arrojadite-(BaFe) !	(Ba,K,Pb)Na3(Ca,Sr)(Fe++,Mg,Mn)14Al(PO4)11(PO3OH)(OH,F)2	2,242.07
20.14 % Fe	Eskebornite #	CuFeSe2	277.31
20.09 % Fe	Melanterite #	Fe++SO4·7(H2O)	278.02
20.08 % Fe	Karibibite	Fe+++2As+++4(O,OH)9	556.38
19.96 % Fe	Bonshtedtite	Na3Fe++(PO4)(CO3)	279.80
19.93 % Fe	Sodic-ferri-ferropedrizite !	NaLi2(Fe+++2Fe++3)Si8O22(OH)2	851.87
19.91 % Fe	Ojuelaite	ZnFe+++2(AsO4)2(OH)2·4(H2O)	561.00
19.87 % Fe	Coquimbite #	Fe+++2(SO4)3·9(H2O)	562.02
19.87 % Fe	Paracoquimbite #	Fe+++2(SO4)3·9(H2O)	562.02
19.83 % Fe	Arrojadite-(NaFe) !	NaNa2CaNa2(Fe++,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2	1,970.99
19.79 % Fe	Ferriallanite-(Ce) !	CaCe(Fe+++,Fe++,Al)3[SiO4][Si2O7]O(OH)	612.23
19.72 % Fe	Ogdensburgite	Ca2(Zn,Mn)Fe+++4(AsO4)4(OH)6·6(H2O)	1,132.66
19.71 % Fe	Magnesioastrophyllite	K2Na[Na(Fe++,Fe+++,Mn)Mg2]Ti2Si8O26(OH)4F	1,275.02
19.70 % Fe	Tassieite !	(Na,[ ])Ca2(Mg,Fe++,Fe+++)2(Fe+++,Mg)2(Fe++,Mg)2(PO4)6(H2O)2	955.32
19.68 % Fe	Perloffite	Ba(Mn,Fe++)2Fe+++2(PO4)3(OH)3	680.92
19.67 % Fe	Arrojadite-(KFe) !	KNa2CaNa2(Fe++,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2	1,987.10
19.65 % Fe	Fluorarrojadite-(KNa) !	KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2	1,989.09
19.62 % Fe	Glauconite #	(K,Na)(Fe+++,Al,Mg)2(Si,Al)4O10(OH)2	426.93
19.61 % Fe	Montroseite #	(V+++,Fe+++,V++++)O(OH)	85.42
19.53 % Fe	IMA2009-037	Fe+++Cu++(As,Sb)O4	286.02
19.51 % Fe	Balangeroite	(Mg,Fe+++,Fe++,Mn++)42Si16O54(OH)40	3,377.84
19.46 % Fe	Jahnsite-(NaFeMg) !	NaFe+++Mg2Fe+++2(PO4)4(OH)2·8H2O	780.46
19.45 % Fe	Yavapaiite	KFe+++(SO4)2	287.07
19.43 % Fe	Zairite	Bi(Fe+++,Al)3(PO4)2(OH)6	646.86
19.38 % Fe	Daubreelite #	Fe++Cr2S4	288.10
19.31 % Fe	Katophorite #	Na(CaNa)Fe++4(Al,Fe+++)Si7AlO22(OH)2	939.86
19.26 % Fe	Quenstedtite #	Fe+++2(SO4)3·10(H2O)	580.04
19.18 % Fe	Squawcreekite ?	(Fe+++,Sb+++++,W++++++)O4·(H2O)	262.07
19.17 % Fe	Mounanaite	PbFe+++2(VO4)2(OH)2	582.79
19.14 % Fe	Magnesioanthophyllite ?	(Mg,Fe++)7Si8O22(OH)2	875.45
19.11 % Fe	Carboirite-VIII	Fe++(Al,Ge)2 O[(Ge,Si)O4](OH)2	292.20
19.08 % Fe	Ferroglaucophane #	[ ]Na2(Fe++3Al2)Si8O22(OH)2	878.17
19.08 % Fe	IMA2007-015	K(CaNa)(Fe++3Al2)(Si6Al2)O22(OH)2	878.18
19.07 % Fe	Ferrotychite	Na6Fe++2(SO4)(CO3)4	585.73
19.00 % Fe	Ferri-clinoholmquistite !	[ ]Li2Mg3(Fe3+)2(Si8O22)(OH)2	849.26
18.99 % Fe	Yazganite !	NaFe+++2(Mg,Mn)(AsO4)3·H2O	602.82
18.96 % Fe	Andradite #	Ca3Fe+++2(SiO4)3	571.41
18.84 % Fe	Carboirite-III	Fe++Al2GeO5(OH)2	296.43
18.77 % Fe	Gengenbachite	KFe3(H2PO4)2(HPO4)4·6H2O or KFe3H8(PO4)6·6H2O	892.62
18.76 % Fe	Kremersite #	(NH4,K)2Fe+++Cl5·(H2O)	297.73
18.74 % Fe	Aluminoferrobarroisite !	[ ]CaNa(Fe2+)3Al2(Si7Al)O22(OH)2	894.15
18.72 % Fe	Potassicferrisadanagaite !	(K,Na)Ca2(Fe++,Mg)2(Fe+++,Al)2[Si5Al3O22](OH,F,O)2	951.81
18.61 % Fe	Ferronyboite !	NaNa2(Fe++)3Al2(Si7Al)O22(OH)2	900.05
18.60 % Fe	Mandarinoite	Fe+++2Se3O9·6(H2O)	600.66
18.58 % Fe	Merrihueite	(K,Na)2(Fe++,Mg)5Si12O30	1,126.96
18.58 % Fe	Odinite	(Fe+++,Mg,Al,Fe++,Ti,Mn)2.5(Si,Al)2O5(OH)4	300.61
18.53 % Fe	Chenevixite #	Cu2Fe+++2(AsO4)2(OH)4·(H2O)	602.67
18.53 % Fe	Magnesiohogbomite-2N3S	(Mg,Fe++)1.4Ti0.3Al4O8	421.89
18.52 % Fe	Violarite #	Fe++Ni+++2S4	301.49
18.47 % Fe	Ferrohogbomite-2N2S !	(Fe++,Zn,Mg,Al)6Al14(Ti,Fe)2O30(OH)2	1,269.78
18.47 % Fe	Eztlite	Pb2Fe+++6(Te++++O3)3(Te++++++O6)(OH)10·8(H2O)	1,814.07
18.43 % Fe	Aluminocopiapite #	Al2/3Fe+++4(SO4)6O(OH)2·20(H2O)	1,212.08
18.41 % Fe	Aluminoferrotschermakite !	[ ]Ca2(Fe2+)3Al2(Si6Al2)O22(OH)2	910.14
18.39 % Fe	Ferberite #	Fe++WO4	303.69
18.39 % Fe	Ferro-aluminotschermakite *	Ca2Fe++3Al2(Si7Al)O22(OH)2	911.24
18.37 % Fe	Calciocopiapite	CaFe+++4(SO4)6(OH)2·19(H2O)	1,216.15
18.33 % Fe	Magnesiocopiapite #	MgFe+++4(SO4)6(OH)2·20(H2O)	1,218.39
18.31 % Fe	Krausite #	KFe+++(SO4)2·(H2O)	305.09
18.27 % Fe	Chondrodite #	(Mg,Fe++)5(SiO4)2(F,OH)2	382.12
18.26 % Fe	Zincocopiapite	ZnFe+++4(SO4)6(OH)2·18(H2O)	1,223.45
18.22 % Fe	Poughite	Fe+++2(TeO3)2(SO4)·3(H2O)	613.00
18.15 % Fe	Humite #	(Mg,Fe++)7(SiO4)3(F,OH)2	538.58
18.08 % Fe	Clinohumite #	(Mg,Fe++)9(SiO4)4(F,OH)2	695.05
17.97 % Fe	Arrojadite-(SrFe) !	SrFe++Na2Ca(Fe++,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2	2,063.97
17.96 % Fe	Crichtonite #	(Sr,La,Ce,Y)(Ti,Fe+++,Mn)21O38	1,772.61
17.95 % Fe	Frohbergite #	FeTe2	311.05
17.91 % Fe	Douglasite #	K2Fe++Cl4·2(H2O)	311.88
17.86 % Fe	Magniotriplite ?	(Mg,Fe++,Mn)2(PO4)F	187.63
17.85 % Fe	Wadsleyite	(Mg,Fe++)2SiO4	156.46
17.82 % Fe	Xitieshanite	Fe+++(SO4)(Cl)·7(H2O)	313.47
17.81 % Fe	Ferrotaaffeite-6N3S	(Fe++,Zn,Mg)2Al6BeO12	470.24
17.76 % Fe	Cuprocopiapite #	CuFe+++4(SO4)6(OH)2·20(H2O)	1,257.64

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( Bold - Valid Mineral Name)
(* - Mineral Name is Not IMA Approved)
(! - New Dana Classification Number Has Been Changed or Added)
(? - IMA Discredited Mineral Species Name)
(# - Grandfathered as valid)