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Magnetite

This page kindly sponsored by Mario Lazzerini Denchi
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About MagnetiteHide

Formula:
Fe2+Fe3+2O4
As a Commodity:
Colour:
Greyish black or iron black
Lustre:
Metallic, Sub-Metallic
Hardness:
5½ - 6½
Specific Gravity:
5.175
Crystal System:
Isometric
Name:
Originally called lodestone as early as 1548 and by other names. Named in 1845 by Wilhelm Karl von Haidinger for the locality at Magnesia, Greece (site for lodestone).
Jacobsite-Magnetite Series. Magnesioferrite-Magnetite Series.

Magnetite is an important iron ore, along with hematite.

Nanoinclusions of magnetite crystals cause the iridescence of Rainbow obsidian (Nadin, 2007). Extremely thin layers of 200-nm octahedral crystals of magnetite give some basalt surfaces an iridescent sheen (Nadin, 2007).

May precipitate from supersaturated volcanic gas due to its cooling as shown in an experiment by Africano et al. (2002) (actually a predominant precipitate from ca. 850 down to 650oC in this particular experiment).

Visit gemdat.org for gemological information about Magnetite.


Classification of MagnetiteHide

Approved, 'Grandfathered' (first described prior to 1959)
4.BB.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
7.2.2.3

7 : MULTIPLE OXIDES
2 : AB2X4
7.20.2

7 : Oxides and Hydroxides
20 : Oxides of Fe

Physical Properties of MagnetiteHide

Metallic, Sub-Metallic
Transparency:
Opaque
Colour:
Greyish black or iron black
Streak:
Black
Hardness:
5½ - 6½ on Mohs scale
Hardness:
VHN100=681 - 792 kg/mm2 - Vickers
Tenacity:
Brittle
Parting:
On {111}, especially good. Also reported as parting planes: {001}, {011}, {138}.
Fracture:
Irregular/Uneven
Density:
5.175 g/cm3 (Measured)    5.2 g/cm3 (Calculated)

Optical Data of MagnetiteHide

Type:
Isotropic
RI values:
n = 2.42
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Very High
Colour in reflected light:
Grey with brownish tint
Internal Reflections:
None
Pleochroism:
Non-pleochroic
Comments:
Twin lamellae and zonal growth pattern exhibited in polished section by magnetite at times.

Chemical Properties of MagnetiteHide

Formula:
Fe2+Fe3+2O4
Common Impurities:
Mg,Zn,Mn,Ni,Cr,Ti,V,Al

Crystallography of MagnetiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Cell Parameters:
a = 8.396 Å
Unit Cell V:
591.86 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Crystals usually octahedral, sometimes dodecahedral, striated on {011} parallel [011]; less frequently with modifying {001} or {hhl}. Cubic (Balmat, NY), rare. Skeletonized microcrystals found in igneous rocks. Massive, granular, coarse to fine.
Twinning:
Common on {111}, with the same face as the composition face. Twins flattened parallel to {111} (common spinel law twins), or as lamellar twins, producing striae on {111}. Twin gliding, with K1{111}, K2{111}.

Crystallographic forms of MagnetiteHide

Crystal Atlas:
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Magnetite no.3 - Goldschmidt (1913-1926)
Magnetite no.30 - Goldschmidt (1913-1926)
Magnetite no.37 - Goldschmidt (1913-1926)
Magnetite no.53 - Goldschmidt (1913-1926)
Magnetite no.91 - Goldschmidt (1913-1926)
Magnetite no.92 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000945MagnetiteWechsler B A, Lindsley D H, Prewitt C T (1984) Crystal structure and cation distribution in titanomagnetites (Fe3-xTixO4) American Mineralogist 69 754-7701984synthetic0293
0002400MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-52320000293
0002401MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-52320001.4293
0002402MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-52320002.3293
0002403MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-52320003.4293
0002404MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-52320006.6293
0002405MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-52320008.3293
0002406MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-523200011.3293
0002407MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-523200012.5293
0002408MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-523200013.5293
0002409MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-523200015.7293
0002410MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-523200017.5293
0002411MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-523200019.4293
0002412MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-523200021.8293
0002413MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-523200024.2293
0002414MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-523200026.9293
0002415MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure American Mineralogist 85 514-523200030.3293
0002416MagnetiteHaavik C, Stolen S, Fjellvag H, Hanfland M, Hausermann D (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure Sample at 40 GPa, CaTi2O4 structure type American Mineralogist 85 514-52320000293
0002762MagnetiteFjellvag H, Hauback B C, Vogt T, Stolen S (2002) Monoclinic nearly stoichiometric wustite at low temperatures American Mineralogist 87 347-3492002010
0002763MagnetiteFjellvag H, Hauback B C, Vogt T, Stolen S (2002) Monoclinic nearly stoichiometric wustite at low temperatures American Mineralogist 87 347-349200208
0004815MagnetiteBosi F, Halenius U, Skogby H (2009) Crystal chemistry of the magnetite-ulvospinel series American Mineralogist 94 181-1892009synthetic0293
0004816MagnetiteBosi F, Halenius U, Skogby H (2009) Crystal chemistry of the magnetite-ulvospinel series American Mineralogist 94 181-1892009synthetic0293
0004817MagnetiteBosi F, Halenius U, Skogby H (2009) Crystal chemistry of the magnetite-ulvospinel series American Mineralogist 94 181-1892009synthetic0293
0004818MagnetiteBosi F, Halenius U, Skogby H (2009) Crystal chemistry of the magnetite-ulvospinel series American Mineralogist 94 181-1892009synthetic0293
0004819MagnetiteBosi F, Halenius U, Skogby H (2009) Crystal chemistry of the magnetite-ulvospinel series American Mineralogist 94 181-1892009synthetic0293
0004820MagnetiteBosi F, Halenius U, Skogby H (2009) Crystal chemistry of the magnetite-ulvospinel series American Mineralogist 94 181-1892009synthetic0293
0004821MagnetiteBosi F, Halenius U, Skogby H (2009) Crystal chemistry of the magnetite-ulvospinel series American Mineralogist 94 181-1892009synthetic0293
0005178MagnetiteStout M Z, Bayliss P (1980) Crystal structure of two ferrian ulvospinels from British Columbia The Canadian Mineralogist 18 339-3411980Aiyansh basalt lava flow, Nass River valley, British Columbia, Canada0293
0005179MagnetiteStout M Z, Bayliss P (1980) Crystal structure of two ferrian ulvospinels from British Columbia The Canadian Mineralogist 18 339-3411980Itcha Mountain hawaiite lava flow, central British Columbia, Canada0293
0007394MagnetiteFinger L W, Hazen R M, Hofmeister A M (1986) High-pressure crystal chemistry of spinel (MgAl2O4) and magnetite (Fe3O4): comparisons with silicate spinels Physics and Chemistry of Minerals 13 215-22019860.0001293
0007395MagnetiteFinger L W, Hazen R M, Hofmeister A M (1986) High-pressure crystal chemistry of spinel (MgAl2O4) and magnetite (Fe3O4): comparisons with silicate spinels Physics and Chemistry of Minerals 13 215-22019861.3293
0007396MagnetiteFinger L W, Hazen R M, Hofmeister A M (1986) High-pressure crystal chemistry of spinel (MgAl2O4) and magnetite (Fe3O4): comparisons with silicate spinels Physics and Chemistry of Minerals 13 215-22019862.6293
0007397MagnetiteFinger L W, Hazen R M, Hofmeister A M (1986) High-pressure crystal chemistry of spinel (MgAl2O4) and magnetite (Fe3O4): comparisons with silicate spinels Physics and Chemistry of Minerals 13 215-22019863.9293
0007398MagnetiteFinger L W, Hazen R M, Hofmeister A M (1986) High-pressure crystal chemistry of spinel (MgAl2O4) and magnetite (Fe3O4): comparisons with silicate spinels Physics and Chemistry of Minerals 13 215-22019864.5293
0007418MagnetiteNakagiri N, Manghnani M H, Ming L C, Kimura S (1986) Crystal structure of magnetite under pressure Physics and Chemistry of Minerals 13 238-24419860.0001293
0007419MagnetiteNakagiri N, Manghnani M H, Ming L C, Kimura S (1986) Crystal structure of magnetite under pressure Physics and Chemistry of Minerals 13 238-24419860.63293
0007420MagnetiteNakagiri N, Manghnani M H, Ming L C, Kimura S (1986) Crystal structure of magnetite under pressure Physics and Chemistry of Minerals 13 238-24419861.55293
0007421MagnetiteNakagiri N, Manghnani M H, Ming L C, Kimura S (1986) Crystal structure of magnetite under pressure Physics and Chemistry of Minerals 13 238-24419862.09293
0007422MagnetiteNakagiri N, Manghnani M H, Ming L C, Kimura S (1986) Crystal structure of magnetite under pressure Physics and Chemistry of Minerals 13 238-24419862.76293
0007423MagnetiteNakagiri N, Manghnani M H, Ming L C, Kimura S (1986) Crystal structure of magnetite under pressure Physics and Chemistry of Minerals 13 238-24419863.67293
0007424MagnetiteNakagiri N, Manghnani M H, Ming L C, Kimura S (1986) Crystal structure of magnetite under pressure Physics and Chemistry of Minerals 13 238-24419864.44293
0007766MagnetiteO'Neill H St C, Dollase W A (1994) Crystal structures and cation distributions in simple spinels from powder XRD structural refinements: MgCr2O4, ZnCr2O4, Fe3O4 and the temperature dependence of the cation distribution in ZnAl2O4 Physics and Chemistry of Minerals 20 541-55519940293
0007771MagnetiteO'Neill H St C, Dollase W A (1994) Crystal structures and cation distributions in simple spinels from powder XRD structural refinements: MgCr2O4, ZnCr2O4, Fe3O4 and the temperature dependence of the cation distribution in ZnAl2O4 Physics and Chemistry of Minerals 20 541-55519940293
0007776MagnetiteO'Neill H St C, Dollase W A (1994) Crystal structures and cation distributions in simple spinels from powder XRD structural refinements: MgCr2O4, ZnCr2O4, Fe3O4 and the temperature dependence of the cation distribution in ZnAl2O4 Physics and Chemistry of Minerals 20 541-55519940293
0007781MagnetiteO'Neill H St C, Dollase W A (1994) Crystal structures and cation distributions in simple spinels from powder XRD structural refinements: MgCr2O4, ZnCr2O4, Fe3O4 and the temperature dependence of the cation distribution in ZnAl2O4 Physics and Chemistry of Minerals 20 541-55519940293
0007824MagnetiteO'Neill H St C, Dollase W A (1994) Crystal structures and cation distributions in simple spinels from powder XRD structural refinements: MgCr2O4, ZnCr2O4, Fe3O4 and the temperature dependence of the cation distribution in ZnAl2O4 Physics and Chemistry of Minerals 20 541-55519940293
0007829MagnetiteO'Neill H St C, Dollase W A (1994) Crystal structures and cation distributions in simple spinels from powder XRD structural refinements: MgCr2O4, ZnCr2O4, Fe3O4 and the temperature dependence of the cation distribution in ZnAl2O4 Physics and Chemistry of Minerals 20 541-55519940293
0007834MagnetiteO'Neill H St C, Dollase W A (1994) Crystal structures and cation distributions in simple spinels from powder XRD structural refinements: MgCr2O4, ZnCr2O4, Fe3O4 and the temperature dependence of the cation distribution in ZnAl2O4 Physics and Chemistry of Minerals 20 541-55519940293
0007847MagnetiteO'Neill H St C, Dollase W A (1994) Crystal structures and cation distributions in simple spinels from powder XRD structural refinements: MgCr2O4, ZnCr2O4, Fe3O4 and the temperature dependence of the cation distribution in ZnAl2O4 Physics and Chemistry of Minerals 20 541-55519940293
0009109MagnetiteGatta G D, Kantor I, Ballaran T B, Dubrovinsky L, McCammon C (2007) Effect of non-hydrostatic conditions on the elastic behaviour of magnetite: an in situ single-crystal X-ray diffraction study Physics and Chemistry of Minerals 34 627-6352007synthetic0.0001293
0009110MagnetiteGatta G D, Kantor I, Ballaran T B, Dubrovinsky L, McCammon C (2007) Effect of non-hydrostatic conditions on the elastic behaviour of magnetite: an in situ single-crystal X-ray diffraction study Physics and Chemistry of Minerals 34 627-6352007synthetic4.99293
0009111MagnetiteGatta G D, Kantor I, Ballaran T B, Dubrovinsky L, McCammon C (2007) Effect of non-hydrostatic conditions on the elastic behaviour of magnetite: an in situ single-crystal X-ray diffraction study Physics and Chemistry of Minerals 34 627-6352007synthetic9.21293
0009740MagnetiteFleet M E (1981) The structure of magnetite Acta Crystallographica B37 917-92019810293
0009994MagnetiteFleet M E (1984) The structure of magnetite: two annealed natural magnetites, Fe3.005O4 and Fe2.96Mg0.04O4 Acta Crystallographica C40 1491-149319840293
0009995MagnetiteFleet M E (1984) The structure of magnetite: two annealed natural magnetites, Fe3.005O4 and Fe2.96Mg0.04O4 Acta Crystallographica C40 1491-149319840293
0017295MagnetiteMontoro V (1938) Miscibilita fra gli ossidi salini di ferro e di manganese _cod_database_code 1010369 Gazzetta Chimica Italiana 68 728-73319380293
0020586MagnetiteFleet M E (1986) The structure of magnetite: Symmetry of cubic spinels Journal of Solid State Chemistry 62 75-821986Natural, not provided0293
0020587MagnetiteFleet M E (1986) The structure of magnetite: Symmetry of cubic spinels Journal of Solid State Chemistry 62 75-821986Natural, not provided0293
0020588MagnetiteFleet M E (1986) The structure of magnetite: Symmetry of cubic spinels Journal of Solid State Chemistry 62 75-821986Natural, not provided0293
0020589MagnetiteFleet M E (1986) The structure of magnetite: Symmetry of cubic spinels Journal of Solid State Chemistry 62 75-821986Natural, not provided0293
0020590MagnetiteFleet M E (1986) The structure of magnetite: Symmetry of cubic spinels Journal of Solid State Chemistry 62 75-821986Natural, not provided0293
0013895MagnetiteFjellvag H, Gronvold F, Stolen S, Hauback B C (1996) On the crystallographic and magnetic structures of nearly stoichiometric iron monoxide Journal of Solid State Chemistry 124 52-571996synthetic0293
0013896MagnetiteFjellvag H, Gronvold F, Stolen S, Hauback B C (1996) On the crystallographic and magnetic structures of nearly stoichiometric iron monoxide Journal of Solid State Chemistry 124 52-571996synthetic0293
0017938MagnetiteBragg W (1915) The Structure of Magnetite and the Spinels _cod_database_code 1011032 Nature (London) 95 561-56119150293
0017981MagnetiteClaassen A (1926) The scattering power of oxygen and iron for X-Rays _cod_database_code 1011084 Proceedings of the Physical Society of London 38 482-48719260293
CIF Raw Data - click here to close

Epitaxial Relationships of MagnetiteHide

Epitaxial Minerals:
Epitaxy Comments:
Hematite overgrowths on, and inclusions in, magnetite; ilmenite inclusions, rutile overgrowths, chlorite group overgrowths, pyrophanite inclusions; magnetite on hematite; inclusions in muscovite; inclusions in hematite; inclusions in ilmenite; magnetite overgrowths on olivine

X-Ray Powder DiffractionHide

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Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
4.852 Å(8)
2.967 Å(30)
2.532 Å(100)
2.4243 Å(8)
2.0993 Å(20)
1.7146 Å(10)
1.6158 Å(30)
1.4845 Å(40)
1.4192 Å(2)
1.3277 Å(4)
1.2807 Å(10)
1.2659 Å(4)
1.2119 Å(2)
1.1221 Å(4)
1.0930 Å(12)
1.0496 Å(6)
0.9896 Å(2)
0.9695 Å(6)
0.9632 Å(4)
0.9388 Å(4)
0.8952 Å(2)
0.8802 Å(6)
0.8569 Å(8)
0.8233 Å(4)
0.8117 Å(6)
Comments:
ICDD 19-629

Geological EnvironmentHide

Geological Setting:
Common igneous accessory mineral. In sedimentary banded iron formations.

Synonyms of MagnetiteHide

Other Language Names for MagnetiteHide

Varieties of MagnetiteHide

Aluminous MagnetiteAl-rich variety of magnetite
ChrommagnetiteA member of Chromite-Magnetite Series - a chromian variety of Magnetite with Cr3+ contents 0,50-1 apfu.
HydromagnetiteA hydrated Magnetite.
IshkuliteA Cr-bearing variety of magnetite with Cr3+ contents of 0.10-0.50 apfu.
A member of the Chromite-Magnetite Series.
LodestoneA variety of magnetite that is a natural magnet (magnetized).
ManganmagnetiteA variety of magnetite containing Mn 2+ substituting for Fe 2+.
Mg-TitanomagnetiteTitanium- and magnesium-rich magnetite.
MushketoviteThe name given for Magnetite pseudomorphs after Hematite.
Nickel-bearing Magnetite
Silfbergite (of Niggli)A manganoan variety of magnetite. Contains Mn 2+ substituting for Fe 2+.
Titaniferous MagnetiteA titanium-bearing variety of magnetite.
Vanadium and Titanium-bearing MagnetiteMay also be formulated as vanadiferous titanomagnetite.
Vanado-MagnetiteA vanadian variety of magnetite. V content reported up to 4.84% (India).
Vanodiochrome spinelA vanadian chromian Magnetite variety.
Using the name "Vanadiochrome spinel", Mathiesen (1970) describes a magnetite containing large amounts of vanadium (16,98% V2O3) and chrome (Cr2O3), occuring in a small area with felsic rock cut by veins filled with ...

Relationship of Magnetite to other SpeciesHide

Other Members of this group:
ChromiteFe2+Cr3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
Cochromite(Co,Ni,Fe)(Cr,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
CoulsoniteFe2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
CuprospinelCu2+Fe3+2O4Iso.
DellagiustaiteV2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
Deltalumite(Al0.670.33)Al2O4Tet. 4 2m : P4m2
FrankliniteZn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
GahniteZnAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
GalaxiteMn2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
GuiteCo2+Co3+2O4Iso.
HausmanniteMn2+Mn3+2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
HercyniteFe2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
HetaeroliteZnMn2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
JacobsiteMn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
Maghemite(Fe3+0.670.33)Fe3+2O4Iso. 4 3 2 : P41 3 2
MagnesiochromiteMgCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
MagnesiocoulsoniteMgV2O4Iso.
MagnesioferriteMgFe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
ManganochromiteMn2+Cr2O4Iso. m3m (4/m 3 2/m) : Fd3m
Nichromite(Ni,Co,Fe)(Cr,Fe,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
SpinelMgAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
ThermaerogeniteCuAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
Titanomaghemite(Ti4+0.50.5)Fe3+2O4Iso. 4 3 2 : P43 3 2
TrevoriteNi2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
UM1994-06-O:AlCoCoAl2O4
VuorelaineniteMn2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
ZincochromiteZnCr2O4Iso.
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
243 photos of Magnetite associated with CalciteCaCO3
196 photos of Magnetite associated with HematiteFe2O3
173 photos of Magnetite associated with QuartzSiO2
150 photos of Magnetite associated with Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
113 photos of Magnetite associated with ChalcopyriteCuFeS2
92 photos of Magnetite associated with PyriteFeS2
88 photos of Magnetite associated with Feldspar Group
75 photos of Magnetite associated with PerovskiteCaTiO3
72 photos of Magnetite associated with ClinochloreMg5Al(AlSi3O10)(OH)8
64 photos of Magnetite associated with AndraditeCa3Fe3+2(SiO4)3

Related Minerals - Nickel-Strunz GroupingHide

4.BB.ChenmingiteFeCr2O4Orth. mmm (2/m 2/m 2/m) : Pnma
4.BB.DellagiustaiteV2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.ThermaerogeniteCuAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05ChromiteFe2+Cr3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05Cochromite(Co,Ni,Fe)(Cr,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05CoulsoniteFe2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05CuprospinelCu2+Fe3+2O4Iso.
4.BB.05Filipstadite(Fe3+0.5Sb5+0.5)Mn2O4Iso.
4.BB.05FrankliniteZn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05GahniteZnAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05GalaxiteMn2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05HercyniteFe2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05JacobsiteMn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05ManganochromiteMn2+Cr2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05MagnesiocoulsoniteMgV2O4Iso.
4.BB.05MagnesiochromiteMgCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05MagnesioferriteMgFe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05Nichromite(Ni,Co,Fe)(Cr,Fe,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05Qandilite(Mg,Fe3+)2(Ti,Fe3+,Al)O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05SpinelMgAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05TrevoriteNi2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05UlvöspinelTiFe2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05VuorelaineniteMn2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05ZincochromiteZnCr2O4Iso.
4.BB.10HausmanniteMn2+Mn3+2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.10HetaeroliteZnMn2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.10HydrohetaeroliteZnMn2O4 · H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.10Jacobsite-QMn2+(Fe3+,Mn3+)2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.15Maghemite(Fe3+0.670.33)Fe3+2O4Iso. 4 3 2 : P41 3 2
4.BB.15Titanomaghemite(Ti4+0.50.5)Fe3+2O4Iso. 4 3 2 : P43 3 2
4.BB.20Tegengrenite(Mn3+0.5Sb5+0.5)Mg2O4Trig.
4.BB.25XieiteFe2+Cr2O4Orth. mmm (2/m 2/m 2/m)

Related Minerals - Dana Grouping (8th Ed.)Hide

7.2.2.1MagnesioferriteMgFe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.2.2.2JacobsiteMn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.2.2.4FrankliniteZn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.2.2.5TrevoriteNi2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.2.2.6CuprospinelCu2+Fe3+2O4Iso.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.20.1WüstiteFeOIso. m3m (4/m 3 2/m) : Fm3m
7.20.3Maghemite(Fe3+0.670.33)Fe3+2O4Iso. 4 3 2 : P41 3 2
7.20.4HematiteFe2O3Trig. 3m (3 2/m) : R3c
7.20.5Goethiteα-Fe3+O(OH)Orth. mmm (2/m 2/m 2/m)
7.20.6Akaganeite(Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2OMon. 2/m
7.20.7FeroxyhyteFe3+O(OH)Hex.
7.20.8Lepidocrociteγ-Fe3+O(OH)Orth. mm2 : Cmc21
7.20.9FerrihydriteFe3+10O14(OH)2Trig.
7.20.10AmakiniteFe2+(OH)2Trig.
7.20.11MagnesioferriteMgFe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.20.12MuskoxiteMg7Fe4O13 · 10H2OTrig. 3m (3 2/m)
7.20.13SrebrodolskiteCa2Fe3+2O5Orth. mmm (2/m 2/m 2/m) : Pnma
7.20.14HercyniteFe2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.20.15BrownmilleriteCa2(Al,Fe3+)2O5Orth. mm2

Fluorescence of MagnetiteHide

Not Fluorescent in UV

Other InformationHide

Magnetism:
Ferromagnetic
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Industrial Uses:
Ore of iron.

Magnetite in petrologyHide

An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.

References for MagnetiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mügge (1905) Jb. Min., Beil.-Bd.: 16: 335.
Bragg (1915) Nature: 95: 561.
Bragg (1915) Phl. Magazine: 30: 305.
Greig, Merwin, Posnjak (1936) American Mineralogist: 21: 504.
Palache, C., Berman, H., Frondel, C. (1944) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 698-707.
Schneiderhöhn (1958): I: 226-287.
Buddington, A.F., Lindsley, D.H. (1964) Iron-titanium oxide minerals and synthetic equivalents. Journal of Petrology: 5: 310-357.
Johnson, H.P., Merrill, R.T. (1972) Magnetic and mineralogical changes associated with low-temperature oxidation of magnetite. Journal of Geophysical Research: 77: 334-341.
Neumann, E.-R. (1974) The distribution of Mn 2+ and Fe 2+ between ilmenites and magnetites in igneous rocks. American Journal of Science: 274: 1074-1088.
Ishihara, S. (1977) The magnetite-series and ilmenite-series granitic rocks. Mining Geology: 27: 293-305.
Mao, H.K., Virgo, D., Bell, P.M. (1977) High-pressure 57Fe Mössbauer data on the phase and magnetic transitions of magnesioferrite (MgFe2O4), magnetite (Fe3O4), and hematite (Fe2O3). Carnegie Institution of Washington Year Book: 76: 522-525.
Cawthorn, R.G., McCarthy, TS. (1980) Variations in Cr content of magnetite from the upper zone of the Bushveld complex - Evidence for heterogeneity and convection currents in magma chambers. Earth and Planetary Science Letters: 46: 335-343.
Fleet, M.E., Bilcox, G.A., Barnett, R.L. (1980) Oriented magnetite inclusions in pyroxenes from the Grenville province. Canadian Mineralogist: 18: 89-99.
Fleet, M.E. (1982) The structure of magnetite: defect structure II. Ata Crystallographica: B38: 1718-1723.
Fleet, M.E. (1984) The structure of magnetite: two annealed natural magnetites, Fe3.005O4 and Fe2.96Mg0.04O4. Acta Crystallographica (1984): C40: 1491-1493.
Markgraf, S.A., Reeder, R.J. (1985) High-temperature structure refinements of calcite and magnetite: American Mineralogist: 70: 590.
Fleet, M.E. (1986a) The structure of magnetite: symmetry of cubic spinels. Journal of Solid State Chemistry: 62: 75-82.
O'Neill, H.St.C. (1987) The quartz-fayalite-magnetite equilibria and free energies of formation of fayalite (Fe2SiO4) and magnetite (Fe3O4). American Mineralogist: 72: 67-75.
Collyer, S., Grimes, N.W., Vaughan, D.J. (1988) Does magnetite lack a centre of symmetry? Journal of Physics C (Solid State Physics): 21: L989-L992.
Goss, C.J. (1988) Saturation magnetisation, coercivity and lattice parameter changes in the system Fe3O4-γ-Fe2O3, and their relationship to structure. Physics and Chemistry of Minerals: 16: 164-171.
Cecchini A., Franzini M., Troysi M.(1989) La microdurezza della magnetite. Atti Soc. Tosc. Sc. Nat., Mem., Serie A: 96: 327-332.
Pasternak, M.P., Nasu, S., Wada, K., Endo, S. (1994) High-pressure phase of magnetite. Physical Review B: 50: 6446-6449.
Berti G. (1995) Microstructure of Magnetite from XRPD Data in Relation to Magnetism. Material Science Forum (Trans. Tech. Pub. Zurich Switz.) Vol. 229-231, pp. 431-436.
Kuiper, P., Searle, B.G., Duda, L.-C., Wolf, R.M., van der Zaag, P.J. (1997) Fe L2,3 linear and circular magnetic dichroism of Fe3O4. Journal of Electron Spectroscopy and Related Phenomena: 86: 107-113.
Coey, J.M.D., Berkowits, A.E., Balcells, L.I., Putris, F.F., Parker, F.T. (1998) Magnetoresistance of magnetite. Applied Physics Letters: 72: 734-736.
Haavik, C., Stølen, S., Fjellvåg, H., Hanfland, M., D. Häusermann, D. (2000) Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure. American Mineralogist: 85: 514-523.
de Castro, A.R.B., Fonesca, P.T., Pacheco, J.G., da Slva, J.C.V., Santana, M.H.A. (2001) L-edge inner shell spectroscopy of nanostructural Fe3O4. Journal of Magnetism and Magnetic Materials: 233: 69-73.
Wright, J.P., Attfield, J.P., Radaelli, P.G. (2001) Long range charge ordering in magnetite below the Verwey transition. Physical Review Letters: 27: 266401/1-4.
Cornell, R.M., Schwertmann, U. (2003) The iron oxides. Structure, properties, reactions, occurrences and uses. Wiley-VCH, Weinheim.
Chen, J., Huang, D.J., Tanaka, A., Chang, C.F., Chung, S.C., Wu, W.B., Chen, C.T. (2004) Magnetic circular dichroism in Fe 2p resonant photoemission of magnetite. Physical Review B: 69: 085107-1-085107-8.
Huang, D.J., Chang, C.F., Jeng, H.-T., Guo, G.Y., Lin, H.-J., W, W.B., Ku, H.C., Fujimori, A., Takahashi, Y., Chen, C.T. (2004) Spin and orbital magnetic moments of Fe3O4. Physical Review Letters: 93: 077204/1-4.
Lazor, P., Shebanova, O.N., Annersten, H. (2004), High-pressure study of stability of magnetite by thermodynamic analysis and synchrotron X-ray diffraction. Journal of Geophysical Research: 109: B05201.
Pearce, C.I., Henderson, C.M.B., Pattrick, R.A.D., van der Laan, G., Vaughan, D.J. (2006) Direct determination of cation site occupancies in natural ferrite spinels by L 2,3 X-ray absorption spectroscopy and X-ray magnetic circular dichroism. American Mineralogist: 91: 880-893.
Nadin, E. (2007) The secret lives of minerals. Engineering & Science: 1: 10-20.
Africano, F., Van Rompaey, G., Bernard, A., Le Guern, F. (2002): Deposition of trace elements from high temperature gases of Satsuma-Iwojima volcano. Earth Planets Space: 54: 275-286

Internet Links for MagnetiteHide

Significant localities for MagnetiteHide

Showing 16 significant localities out of 17,372 recorded on mindat.org.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Tasmania
    • Burnie City
      • Hampshire district
        • Kara Mines
Whitehead, 1990; Ralph Bottrill 6/10/2005.; MINERALOGICAL MAGAZINE, SEPTEMBER 1984, VOL. 48, PP. 397-400; Singoyi, B. (1995). Mineral paragenesis, geochemistry and fluid characteristics of the Kara scheelite-magnetite skarn deposit, Northwestern Tasmania (Masters dissertation, University of Tasmania).
Canada
 
  • Ontario
    • Hastings County
      • Faraday Township
Robinson & Chamberlain (1982) - Mineralogical Record v14 n2; Joyce, D. K. (2006) Calcite Vein-Dikes of the Grenville Geological Province, Ontario, Canada. Rocks and Minerals 81:34-42; Ontario Ministry of Northern Development and Mines,MDI Number: MDI31F04SW00297
  • Québec
    • Abitibi-Témiscamingue
      • La Vallée-de-l'Or RCM
        • Réservoir-Dozois
Olivier Langelier Collection; Hudon, P., Friedman, R.M., Gauthier, G. & Martignole, J. (2006) Age of the Cabonga nepheline syenite, Grenville Province, western Quebec. Canadian Journal of Earth Sciences, vol. 43(9), 1237-1249.
France
 
  • Brittany
    • Côtes-d'Armor
      • Lannion
        • Plestin-les-Grèves
Pierrot R., Chauris L., Laforêt C. (1975), Inventaire minéralogique de la France, Ed. BRGM, n°5, Côtes du Nord, pp: 110-113
Norway
 
  • Troms og Finnmark
    • Kautokeino
[var: Vanodiochrome spinel] Mathiesen, C.O. (1969): An occurence of unusual minerals at Bidjovagge, Northern Norway.Norges Geologiske Undersøkelse 266, 86-104
Portugal
 
  • Leiria
    • Nazaré
      • Nazaré
Collected by Rui Nunes in several visits to the locality
UK
 
  • Scotland
    • Shetland
      • Mainland
        • Point of Fethaland
[Specimen in the Natural History Museum, London]
USA
 
  • Alaska
    • Prince of Wales-Hyder Census Area
      • Ketchikan Mining District
        • Prince of Wales Island
Min Rec 35:5 pp383-404, 419-420
  • Connecticut
    • Middlesex Co.
      • Haddam
        • Higganum
Foye (1922); Rice and Foye (1927); Williams (circa 1945)
Schooner, Richard. (circa 1985), Untitled manuscript on central Connecticut mineralogy.
  • Massachusetts
    • Middlesex Co.
Dale, T. Nelson (1910). Supplementary Notes on the Commercial Granites of New England. (USGS Bulletin 470).
  • New York
    • Putnam Co.
      • Town of Southeast
        • Brewster
(Dana, 1874) (Januzzi, 1966, 1989) (Man¬chester, 1931) (Trainer, 1938, 1941) (Whitlock, 1903) (Nightingale 2001) Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 214..
  • Pennsylvania
    • Lebanon Co.
      • Cornwall Borough (Cornwall)
Rocks & Min.: 13:213.; Econ Geol (1985) 80:418-443
  • Rhode Island
    • Providence Co.
      • Providence
        • Manton
Miller, C. E. (1971) Rhode Island Minerals and Their Locations, University of Rhode Island, Kingston
  • Wisconsin
    • Dodge Co.
      • Iron Ridge Mining District (Neda Iron Mining District)
        • Iron Ridge Mines
Hawley, J. & A. Bevan (1934) Mineralogy and genesis of the Mayville iron ore of Wisconsin: american Mineralogist: 19 (11): 493- 514.
Hawley, J. & A. Bevan (1934) Mineralogy and genesis of the Mayville iron ore of Wisconsin: american Mineralogist: 19 (11): 493- 514.
 
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