Magnetit

Magnetit eller magnetjernsten er en jernmalm med den kemiske forbindelse Fe₃O₄, eller FeO $\cdot$ Fe₂O₃. Det krystalliserer kubisk med spinel-struktur.

Magnetit er ferrimagnetisk^[1] og det bliver tiltrukket af magneter, og det kan magnetiseres til at blive en permanent magnet.^[2]^[3] Det bruges blant andet til fremstilling af jern og stål, som pigment i maling samt til magneter.

Referencer

^ Jacobsen, S.D.; Reichmann, H.J.; Kantor, A.; Spetzler, H.A. (2005). "A gigahertz ultrasonic interferometer for the diamond anvil cell and high-pressure elasticity of some iron-oxide minerals". I Chen, J.; Duffy, T.S.; Dobrzhinetskaya, L.F.; Wang, Y.; Shen, G. (red.). Advances in High-Pressure Technology for Geophysical Applications. Elsevier Science. s. 25-48. doi:10.1016/B978-044451979-5.50004-1. ISBN 978-0-444-51979-5.
^ Hurlbut, Cornelius Searle; W. Edwin Sharp; Edward Salisbury Dana (1998). Dana's minerals and how to study them. John Wiley and Sons. s. 96. ISBN 978-0-471-15677-2.
^ Wasilewski, Peter; Günther Kletetschka (1999). "Lodestone: Nature's only permanent magnet - What it is and how it gets charged". Geophysical Research Letters. 26 (15): 2275-78. Bibcode:1999GeoRL..26.2275W. doi:10.1029/1999GL900496. S2CID 128699936.

Eksterne henvisninger

Mineral galleries Arkiveret 2011-02-07 hos Wayback Machine
Bio-magnetics
Magnetite mining in New Zealand Accessed 25-Mar-09

Spire

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[Ferrimag2005-1] Jacobsen, S.D.; Reichmann, H.J.; Kantor, A.; Spetzler, H.A. (2005). "A gigahertz ultrasonic interferometer for the diamond anvil cell and high-pressure elasticity of some iron-oxide minerals". I Chen, J.; Duffy, T.S.; Dobrzhinetskaya, L.F.; Wang, Y.; Shen, G. (red.). Advances in High-Pressure Technology for Geophysical Applications. Elsevier Science. s. 25-48. doi:10.1016/B978-044451979-5.50004-1. ISBN 978-0-444-51979-5.

[Dana-2] Hurlbut, Cornelius Searle; W. Edwin Sharp; Edward Salisbury Dana (1998). Dana's minerals and how to study them. John Wiley and Sons. s. 96. ISBN 978-0-471-15677-2.

[Wasilewski-3] Wasilewski, Peter; Günther Kletetschka (1999). "Lodestone: Nature's only permanent magnet - What it is and how it gets charged". Geophysical Research Letters. 26 (15): 2275-78. Bibcode:1999GeoRL..26.2275W. doi:10.1029/1999GL900496. S2CID 128699936.

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