Main Focus

I am an experimental planetologist and my main interests are in high-temperature processes from magma ocean worlds, to planetary volcanism on the Moon and Mercury. In the experimental planetology group we conduct high-temperature and low-pressure experiments, as well as thermodynamic calculation to constrain the formation of planetary materials and use analytical tools to relate the results to samples, such as the rocks returned by the Apollo missions from the Moon. In addition we use spectroscopic methods to relate experimental results to observations of terrestrial planets by space missions. I am also a Co-I of the MERTIS (Mercury Radiometer and Thermal Infrared Spectrometer) and MIXS (Mercury Imaging X-ray Spectrometer) instruments on the ESA/JAXA BepiColombo mission to Mercury.


Curriculum Vitae

Awards and Fellowships:

2025 ERC Starting Grant ELMO - Experimental Laboratory Magma Ocean
2023 Paul Niggli Medal, awarded by the Swiss Geological Society “in recognition for outstanding research using experimental methods to understand the properties of gas-solid reactions in volcanic systems on Earth, the Moon and Mercury.”
2018 Swiss National Science Foundation Early Postdoc. Mobility Fellow

Roles in Space Missions:

Co-I: MERTIS on BepiColombo
Co-I: MIXS on BepiColombo

Education and Employment:

2025-ongoing: Research Group Leader, Experimental Planetology
2023-2025: Researcher, MPS 
2018-2023: Postdoctoral researcher, Institut für Mineralogie, Universität Münster 
2014-2018: PhD at the Research School of Earth Sciences, Australian National University, Canberra 

Selected Publications:

Renggli C.J., Steenstra, E.S., Saal, A.E. (2026) Sulfur in the Moon and Mercury. In Harlov, D.E., Pokrovski, G.S. (eds) The Role of Sulfur in Planetary Processes: From Cores to Atmospheres. Springer Geochemistry. Springer, Cham.

doi:10.1007/978-3-032-07705-9_15

Haupt C.P., Renggli C.J., Rohrbach A., Berndt J., Klemme S. (2024) Experimental Constraints on the Origin of the Lunar High-Ti Basalts. Journal of Geophysical Research: Planets, 129/8, e2023JE008239. 
doi:10.1029/2023JE008239

Renggli C.J., Klemme S., Morlok A., Berndt J., Weber I., Hiesinger H., King P.L. (2022) Sulfides and hollows formed on Mercury's surface by reactions with reducing S-rich gases. Earth and Planetary Sciences Letters, 593, 117647. 
doi:10.1016/j.epsl.2022.117647

Renggli C.J., Hellmann J.L., Burkhardt C., Klemme S., Berndt J., Pangritz P., Kleine T. (2022) Tellurium isotope fractionation during evaporation from silicate melts. Geochimica et Cosmochimica Acta, 339, 35-45. 
doi:10.1016/j.gca.2022.10.032

Renggli C.J., Klemme S. (2021) Experimental investigation of Apollo 16 “Rusty Rock” alteration by a lunar fumarolic gas. Journal of Geophysical Research: Planets, 126/2, e2020JE006609. 
doi:10.1029/2020JE006609


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