Tetrataenite

Tetrataenite
Silvery-bright tetrataenite crystals
General
CategoryNative element minerals
Formula
(repeating unit)
FeNi
IMA symbolTtae[1]
Strunz classification1.AE.10
Crystal systemTetragonal
Crystal classDomatic (m)
(same H-M symbol)
Space groupPm
Unit cell22.92 ų
Identification
Formula mass57.27 gm
Colorgray white, silver white
Crystal habitGranular – Common texture observed in granite and other igneous rock
Cleavagenone
Fracturemalleable
Mohs scale hardness3.5
Lustermetallic
Streakgray
Diaphaneityopaque
Density8.275
Common impuritiesCo, Cu, P
References[2][3][4]

[1]

[2]

Tetrataenite is a native metal alloy composed of chemically-ordered L10-type FeNi, recognized as a mineral in 1980.[5] The mineral is named after its tetragonal crystal structure and its relation to the iron-nickel alloy, taenite, which is chemically disordered (A1) phase with an underlying fcc lattice.[6] Tetrataenite is one of the mineral phases found in meteoric iron.[7][3][8] Before its discovery in meteoritic samples, experimental synthesis of the L10 phase was first reported in 1962 by Louis Néel and co-workers, following neutron irradiation of a chemically disordered FeNi sample under an applied magnetic field.[9][10][11] Compared to the magnetically soft, chemically disordered A1 phase (taenite), the tetragonal L10 structure of tetrataenite leads to good hard magnetic properties, including a large uniaxial magnetocrystalline anisotropy energy.[10][12] Consequently, it is under consideration for applications as a rare-earth-free permanent magnet.[13]

  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ "Mineralienatlas – Fossilienatlas". www.mineralienatlas.de. Retrieved 1 April 2023.
  3. ^ a b "Tetrataenite: Mineral information, data and localities". Retrieved 1 April 2023.
  4. ^ "Tetrataenite". webmineral.com.
  5. ^ Cite error: The named reference :12 was invoked but never defined (see the help page).
  6. ^ "Tetrataenite: Tetrataenite mineral information and data". www.mindat.org. Retrieved 2018-03-30.
  7. ^ "Tetrataenite". webmineral.com.
  8. ^ "Handbook of Mineralogy – Tetrataenite" (PDF). Retrieved 1 April 2023.
  9. ^ Paulevé, J.; Dautreppe, D.; Laugier, J.; Néel, L. (1962-10-01). "Une nouvelle transition ordre-désordre dans Fe-Ni (50-50 )". Journal de Physique et le Radium (in French). 23 (10): 841–843. doi:10.1051/jphysrad:019620023010084100. ISSN 0368-3842.
  10. ^ a b Néel, L.; Pauleve, J.; Pauthenet, R.; Laugier, J.; Dautreppe, D. (1964-03-01). "Magnetic Properties of an Iron—Nickel Single Crystal Ordered by Neutron Bombardment". Journal of Applied Physics. 35 (3): 873–876. doi:10.1063/1.1713516. ISSN 0021-8979.
  11. ^ Paulevé, J.; Chamberod, A.; Krebs, K.; Bourret, A. (1968-02-01). "Magnetization Curves of Fe–Ni (50–50) Single Crystals Ordered by Neutron Irradiation with an Applied Magnetic Field". Journal of Applied Physics. 39 (2): 989–990. doi:10.1063/1.1656361. ISSN 0021-8979.
  12. ^ Cite error: The named reference :7 was invoked but never defined (see the help page).
  13. ^ Lewis, L. H. (January 27, 2014). "Inspired by nature: investigating tetrataenite for permanent magnet applications". Journal of Physics: Condensed Matter. 26 (6). IOP Publishing: 064213. doi:10.1088/0953-8984/26/6/064213. PMID 24469336. S2CID 24710267.

Tetrataenite

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