Where it forms, where it's found
- Geological setting
which was found on 15 August 2022 on the roof of a modern industrial facility near Skedsmokorset, just north of Oslo. The building, operated by Bertel O. Steen Logistics, was constructed in 2017–2018, ensuring a well-constrained temporal window for micrometeorite accumulation. the formation of jonlarsenite likely reflects high-temperature redox processes that occurred either during parent body alteration or, more plausibly, during peculiar hypervelocity impact events in space.
- Type locality
- NMM/L2 micrometeorite
- Berger
- Skedsmo
- Lillestrøm
- Akershus
- Norway
60.0176°, 11.0579°
1recorded occurrences
Physical
- Transparency
- Opaque
- Density
- 6.979 g/cm³
Crystallography
- Space group
- #211
- Cell parameters
- a = 8.70(1) Å
- Z
- 4
- Type-locality form
elongated spherule approximately 200 µm in diameter, characterised by a dark grey colour and a markedly scoriaceous surface featuring vesicles. subhedral to anhedral grains up to approximately 2 µm in maximum dimension
Crystal structure
Chemical composition
Synonyms
- IMA2024-078a
- Jonlarseniet
- NMM/L2 (Al,Cu)-alloy
In other languages
- German
- Jonlarsenit
Classification
Strunz
10th ed.1.AA
- 1ElementsClass
- 1.AMetals and Intermetallic AlloysDivision
- 1.AACopper-cupalite familyGroup
- 1.AAJonlarseniteSpecies
Literature, links & citation
Citations
- 1978Arnberg, L., Westman, S. (1978) Crystal perfection in a noncentrosymmetric alloy. Refinement and test of twinning of the γ-Cu9Al4structure. Acta Crystallographica Section A, 34 (3) 399-404 doi:10.1107/s0567739478000807DOI: 10.1107/s0567739478000807
- 2010Gaudry, É.; Shukla, A. K.; Duguet, T.; Ledieu, J.; deWeerd, M.-C.; Dubois, J.-M.; Fournée, V. (2010) Structural investigation of the (110) surface of γ-Al4Cu9. Physical Review B, 82 (8). 085411 doi:10.1103/physrevb.82.085411DOI: 10.1103/physrevb.82.085411
- 2014Kwon, J., Thuinet, L., Avettand-Fènoël, M.-N., Legris, A., Besson, R. (2014) Point defects and formation driving forces of complex metallic alloys: Atomic-scale study of Al4Cu9. Intermetallics, 46. 250-258 doi:10.1016/j.intermet.2013.11.023DOI: 10.1016/j.intermet.2013.11.023
- 2025Bindi, L.; Kihle, J. B.; Cheng, G.; Hu, J.; Yao, N.; Ma, C.; Guan, Y.; Asimow, P. D.; Steinhardt, P. J. (2025) Jonlarsenite, Al₄Cu₉, a new intermetallic phase in the Al–Cu system discovered in a micrometeorite from Oslo, Norway. European Journal of Mineralogy, 37 (5). 783-791 doi:10.5194/ejm-37-783-2025DOI: 10.5194/ejm-37-783-2025
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Jonlarsenite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/jonlarsenite-488794},
note = {Accessed 2026-05-11}
}