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 og det bliver tiltrukket af magneter, og det kan magnetiseres til at blive en permanent magnet. Det bruges blandt 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.