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 Mineral Name

Click here for List sorted by Weight Percent

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**1434 Minerals containing Iron (Fe) sorted by Mineral Name**
% Fe	Mineral Name	Chemical Formula	MW
39.03 % Fe	Ferro-anthophyllite #	[ ]Fe++7Si8O22(OH)2	1,001.61
24.20 % Fe	Ferrobarroisite	[ ](CaNa)Fe++3AlFe+++Si7AlO22(OH)2	923.02
6.99 % Fe	Ferrobustamite #	Ca(Fe++,Ca,Mn)Si2O6	239.80
15.31 % Fe	Ferrocarpholite #	(Fe++,Mg)Al2Si2O6(OH)4	324.65
13.92 % Fe	Ferroceladonite !	K2Fe++Fe+++Si8O20(OH)4	802.59
22.36 % Fe	Ferrochloropargasite !	NaCa2(Fe++4Al)Si6Al2O22Cl2	998.88
24.02 % Fe	Ferro-eckermannite	NaNa2(Fe++4Al)Si8O22(OH)2	930.02
28.15 % Fe	Ferro-edenite #	NaCa2Fe++5Si7AlO22(OH)2	991.96
25.57 % Fe	Ferroferribarroisite *	CaNa(Fe++,Mg)3Fe+++2[AlSi7O22](OH)2	928.23
23.83 % Fe	Ferroferritschermakite *	Ca2(Fe++,Mg)3Fe+++2(Si7Al)O22(OH)2	937.43
24.24 % Fe	Ferroferriwinchite *	CaNa(Fe++,Mg)4Fe+++[Si8O22](OH)2	921.45
29.65 % Fe	Ferrogedrite	[ ]Fe++5Al2Si6Al2O22(OH)2	941.68
19.08 % Fe	Ferroglaucophane #	[ ]Na2(Fe++3Al2)Si8O22(OH)2	878.17
33.05 % Fe	Ferrohagendorfite *	(Na,Ca)2Fe++(Fe++,Fe+++)2(PO4)3	506.98
21.48 % Fe	Ferrohexahydrite	Fe++SO4·6(H2O)	260.00
18.47 % Fe	Ferrohogbomite-2N2S !	(Fe++,Zn,Mg,Al)6Al14(Ti,Fe)2O30(OH)2	1,269.78
11.81 % Fe	Ferroholmquistite	[ ](Li2Fe++3Al2)Si8O22(OH)2	808.43
25.05 % Fe	Ferrohornblende	[ ]Ca2[Fe++4(Al,Fe+++)]Si7AlO22(OH)2	947.32
22.36 % Fe	Ferrokaersutite	NaCa2(Fe++4Ti)Si6Al2O22(OH)2	998.89
4.13 % Fe	Ferrokentbrooksite !	Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2	3,231.96
9.69 % Fe	Ferrokesterite	Cu2(Fe,Zn)SnS4	432.30
21.22 % Fe	Ferrokinoshitalite !	(Ba,K)(Fe++,Mg)3(Si2Al2)O10 (OH,F)2	526.29
31.28 % Fe	Ferrolaueite !	Fe++Fe+++2(PO4)2(OH)2·8(H2O)	535.62
28.91 % Fe	Ferroleakeite !	NaNa2(Fe++)3(Fe+++)2Li(Si8O22)(OH)2	965.83
4.13 % Fe	Ferromerrillite !	Ca9NaFe(PO4)7	1,095.41
11.07 % Fe	Ferronickelplatinum	Pt2FeNi	504.70
10.73 % Fe	Ferronigerite-2N1S #	(Zn,Mg,Fe++)(Sn,Zn)2(Al,Fe+++)12O22(OH)2	1,041.00
11.02 % Fe	Ferronigerite-6N6S !	(Fe++,Zn)4Sn2(Al,Fe+++)15O30(OH)2	1,419.10
7.04 % Fe	Ferronordite-(Ce) !	Na3SrCeFe++Si6O17	793.05
2.93 % Fe	Ferronordite-(La) !	Na3Sr(La,Ce)FeSi6O17	800.84
18.61 % Fe	Ferronyboite !	NaNa2(Fe++)3Al2(Si7Al)O22(OH)2	900.05
23.22 % Fe	Ferropargasite	NaCa2(Fe++4Al)Si6Al2O22(OH)2	961.99
7.62 % Fe	Ferrorhodsite	(Fe,Cu)(Rh,Ir,Pt)2S4	417.75
28.61 % Fe	Ferrorichterite #	Na(CaNa)Fe++5[Si8O22](OH)2	975.98
23.59 % Fe	Ferrorosemaryite !	[ ]NaFe++Fe+++Al(PO4)3	454.58
22.38 % Fe	Ferrosaponite !	Ca0.3(Fe++,Mg,Fe+++)3(Si,Al)4O10(OH)2·4(H2O)	526.49
26.13 % Fe	Ferroselite #	FeSe2	213.77
24.04 % Fe	Ferrosilite #	(Fe++,Mg)2Si2O6	232.32
12.10 % Fe	Ferroskutterudite !	(Fe,Co)As3	276.94
33.54 % Fe	Ferrostrunzite	Fe++Fe+++2(PO4)2(OH)2·6(H2O)	499.59
17.81 % Fe	Ferrotaaffeite-6N3S	(Fe++,Zn,Mg)2Al6BeO12	470.24
9.41 % Fe	Ferrotitanowodginite !	Fe++TiTa2O8	593.62
23.79 % Fe	Ferrotschermakite !	[ ]Ca2(Fe++3AlFe+++)Si6Al2O22(OH)	939.00
19.07 % Fe	Ferrotychite	Na6Fe++2(SO4)(CO3)4	585.73
25.48 % Fe	Ferrowinchite	[ ](CaNa)Fe++4(Al,Fe+++)Si8O22(OH)2	931.34
8.41 % Fe	Ferrowodginite	Fe++SnTa2O8	664.45
23.57 % Fe	Ferrowyllieite	(Na,Ca,Mn)(Fe++,Mn)(Fe++,Fe+++,Mg)Al(PO4)3	478.55
66.54 % Fe	Fersilicite *	FeSi	83.93
12.79 % Fe	Feruvite !	(Ca,Na)(Fe,Mg,Ti)3(Al,Mg,Fe)6(BO3)3Si6O18(OH)4	1,047.92
28.89 % Fe	Fervanite #	Fe+++4(VO4)4·5(H2O)	773.22
35.31 % Fe	Fetiasite	(Fe++,Fe+++,Ti++++)3O2(As+++2O5)	426.99
0.02 % Fe	Fettelite !	[Ag6As2S7][Ag10HgAs2S8]	2,720.84
21.56 % Fe	Fibroferrite #	Fe+++(SO4)(OH)·5(H2O)	258.99
0.16 % Fe	Filatovite !	K[(Al,Zn)2(As,Si)2O8]	340.02
10.57 % Fe	Filipstadite	(Mn++,Mg)4Sb+++++Fe+++O8	475.43
10.72 % Fe	Fillowite #	Na2Ca(Mn,Fe++)7(PO4)6	1,042.27
40.83 % Fe	Florenskyite !	(Fe,Ni)TiP	134.03
27.11 % Fe	Fluorannite !	KFe++3AlSi3O10F2	473.80
21.11 % Fe	Fluorarrojadite-(BaFe) !	(Ba,K,Pb)Na3(Ca,Sr)(Fe++,Mg,Mn)14Al(PO4)11(PO3OH)(F,OH)2	2,116.63
23.11 % Fe	Fluorarrojadite-(BaNa) !	BaFe++Na2Ca(Fe++,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2	2,174.71
19.65 % Fe	Fluorarrojadite-(KNa) !	KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2	1,989.09
11.45 % Fe	Fluoro-alumino-magnesiotaramite !	Na(CaNa)(Mg3Al2)(Si6Al2)O22F2	882.71
2.00 % Fe	Fluoro-edenite !	NaCa2Mg5Si7AlO22(F,OH)2	837.03
24.44 % Fe	Fluoro-ferroleakeite	NaNa2(Fe++2Fe+++2Li)Si8O22F2	913.97
4.72 % Fe	Fluoro-magnesio-arfvedsonite !	NaNa2(Mg,Fe++)4Fe+++[Si8O22](F,OH)2	828.15
4.51 % Fe	Fluoro-magnesiohastingsite !	(Na,K)Ca2(Mg,Fe+++,Ti)5(Si,Al)8O22F2	866.18
7.95 % Fe	Fluoronyboite !	NaNa2(Al2Mg3)(Si7Al)O22(F,OH)2	850.22
7.62 % Fe	Fluoropargasite !	NaCa2(Mg3Fe++Al)5(Si6Al2O22)F2	879.14
0.94 % Fe	Fluorophlogopite !	KMg3(AlSi3)O10F2	415.55
17.68 % Fe	Fluoro-potassichastingsite !	KCa2(Fe++2,Mg2,Fe+++)S5(Si6Al2)8O22F2	947.86
3.74 % Fe	Fluoro-sodic-pedrizite !	NaLi2(Mg2Al2Li)S5Si8O22F2	777.04
2.21 % Fe	Fluorvesuvianite !	Ca19(Al,Mg)13[SiO4]10[Si2O7]4(F,OH)10	2,912.65
12.18 % Fe	Foitite !	[ ]Na<0.5(Fe++,Al)3Al6Si6O18(BO3)3(OH)4	1,031.73
2.59 % Fe	Footemineite !	Ca2Mn++Mn++2Mn++2Be4(PO4)6(OH)4·6H2O	1,122.79
46.68 % Fe	Fougerite !	(Fe++,Mg)6Fe+++2(OH)18·4(H2O)	777.66
2.80 % Fe	Franckeite #	(Pb,Sn)6Fe++Sn2Sb2S14	1,995.14
2.25 % Fe	Francoanellite	H6(K,Na)3(Al,Fe+++)5(PO4)8·13(H2O)	1,242.49
5.04 % Fe	Franklinfurnaceite	Ca2(Fe+++,Al)Mn+++Mn++3Zn2Si2O10(OH)8	831.54
37.78 % Fe	Franklinite #	(Zn,Mn++,Fe++)(Fe+++,Mn+++)2O4	236.54
5.51 % Fe	Franklinphilite	(K,Na)4(Mn++,Mg,Zn)48(Si,Al)72(O,OH)216·6(H2O)	8,207.63
14.33 % Fe	Fredrikssonite	Mg2(Mn+++,Fe+++)O2(BO3)	194.81
3.47 % Fe	Freibergite #	(Ag,Cu,Fe)12(Sb,As)4S13	1,929.46
15.93 % Fe	Freudenbergite	Na2Fe+++2Ti6O16	700.94
1.36 % Fe	Friedrichbeckeite !	K([ ],Na)Mg2(Be2Mg)Si12O30	982.67
17.95 % Fe	Frohbergite #	FeTe2	311.05
34.46 % Fe	Frondelite #	Mn++Fe+++4(PO4)3(OH)5	648.28
11.10 % Fe	Fukuchilite	Cu3FeS8	503.01
13.33 % Fe	Gabrielsonite	PbFe++(AsO4)(OH)	418.97
7.23 % Fe	Gadolinite-(Ce)	(Ce,La,Nd,Y)2Fe++Be2Si2O10	571.37
11.94 % Fe	Gadolinite-(Y) #	Y2Fe++Be2Si2O10	467.85
0.87 % Fe	Gainesite	Na2Zr2Be(PO4)4·1-2(H2O)	639.49
3.23 % Fe	Galaxite #	(Mn,Mg)(Al,Fe+++)2O4	172.72
42.05 % Fe	Galileiite !	NaFe++4(PO4)3	531.29
6.22 % Fe	Gallobeudantite !	PbGa3[(AsO4),(SO4)]2(OH)6	718.80
7.26 % Fe	Gamagarite #	Ba2(Fe+++,Mn+++)(VO4)2(OH)	577.16
0.51 % Fe	Ganterite !	[Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2	438.39
10.85 % Fe	Garavellite	FeSbBiS4	514.84
4.50 % Fe	Gartrellite	Pb(Cu,Fe++)2(AsO4,SO4)2(CO3,H2O)0.7	620.46
12.68 % Fe	Garyansellite	(Mg,Fe+++)3(PO4)2(OH,O)·1,5(H2O)	330.29
5.17 % Fe	Gaspeite	(Ni,Mg,Fe++)CO3	108.10

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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)