Jonlarsenite, Al<sub>4</sub>Cu<sub>9</sub>, a new intermetallic phase in the Al–Cu system discovered in a micrometeorite from Oslo, Norway

Bindi, Luca; Kihle, Jan B.; Cheng, Guangming; Hu, Jinping; Yao, Nan; Ma, Chi; Guan, Yunbin; Asimow, Paul D.; Steinhardt, Paul J.

doi:https://doi.org/10.5194/ejm-37-783-2025

Articles | Volume 37, issue 5

https://doi.org/10.5194/ejm-37-783-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/ejm-37-783-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 37, issue 5

New minerals, nomenclature, and classification

|

21 Oct 2025

New minerals, nomenclature, and classification |

| 21 Oct 2025

Jonlarsenite, Al₄Cu₉, a new intermetallic phase in the Al–Cu system discovered in a micrometeorite from Oslo, Norway

Luca Bindi, Jan B. Kihle, Guangming Cheng, Jinping Hu, Nan Yao, Chi Ma, Yunbin Guan, Paul D. Asimow, and Paul J. Steinhardt

Metrics will be available soon.

Latest update: 21 Oct 2025

Short summary

During project STARDUST, over 5500 specimens were recovered. Among them, a micrometeorite from Oslo (NMM/L2) revealed a new Al–Cu alloy with Al₄Cu₉ stoichiometry. This phase was approved as a new mineral named jonlarsenite. The microspherule shows features typical of micrometeorites. Its extraterrestrial origin is confirmed by oxygen isotope composition and chondritic chemistry, similar to previously known Al–Cu meteoritic materials.

Jonlarsenite, Al4Cu9, a new intermetallic phase in the Al–Cu system discovered in a micrometeorite from Oslo, Norway

Jonlarsenite, Al₄Cu₉, a new intermetallic phase in the Al–Cu system discovered in a micrometeorite from Oslo, Norway