Table T27. Magnetic properties of remanence-carrying natural minerals.

Table T27. Magnetic properties of remanence-carrying natural minerals.

Mineral

Composition

Curie
temperature
(°C)

Saturation magnetization
at room temperature

Magnetite Fe₃O₄ 585 93

Ulvospinel Fe₂TiO₄ -153 —

Hematite Fe₂O₃ 675 0.5

Ilmenite FeTiO₃ -218 —

Maghemite Fe₂O₃ ~740 85

Pyrrhotite ~Fe₇S₈ ~300 ~200

Iron Fe 780 200

Goethite FeO·OH 120 ~1

Lepidocrocite FeO·OH -196 —

Magnesioferrite MgFe₂O₄ 440 21

Jacobsite MnFe₂O₄ 310 77

Mineral	Composition	Curie temperature (°C)	Saturation magnetization at room temperature
Magnetite	Fe₃O₄	585	93
Ulvospinel	Fe₂TiO₄	-153	—
Hematite	Fe₂O₃	675	0.5
Ilmenite	FeTiO₃	-218	—
Maghemite	Fe₂O₃	~740	85
Pyrrhotite	~Fe₇S₈	~300	~200
Iron	Fe	780	200
Goethite	FeO·OH	120	~1
Lepidocrocite	FeO·OH	-196	—
Magnesioferrite	MgFe₂O₄	440	21
Jacobsite	MnFe₂O₄	310	77

Notes: — = not applicable. Modified after Thompson and Oldfield (1986).