Dear all, If you are interested in *nucleation**and****crystals****growth*****and if you are keen on coming to *Cologne *in late summer, then it might be worth thinking about participating in the session: "Fundamentals and applied aspects of nucleation and crystal growth" GeoMinKöln 2022 (September 11.-15., 2022). Keynote: Dirk Zahn (Erlangen) "From Understanding to Tailoring: Molecular Simulations unravel Crystal Nucleation and Growth" Whether geogenic and biogenic minerals, or synthetic and engineered materials, their formation is controlled by nucleation and crystal growth phenomena. For example, solid phase formation from an aqueous solution requires new building blocks to nucleate and subsequently either grow into crystals or agglomerate into aggregates and mesocrystals. Crystallization by addition of particles (ranging from multi-ion complexes to nanocrystals) is now recognized as an alternative phenomenon to classical crystallization by monomer-by-monomer attachment. The ease of these processes and final crystal morphology is frequently dictated by the presence of other minerals, additives or impurities as well as the physicochemical parameters and hydrodynamics of the solution. It is often observed that metastable phases form initially followed by multiple dissolution-reprecipitation events that drive the system to the most thermodynamically stable mineral phase. Even if the most stable phase does nucleate directly, there may be textural re-equilibrations that occur, which are also governed by dissolution-reprecipitation. Similarly, exposure of biological mineralised tissues to different environments during diagenesis, may lead to chemical and structural alteration of minerals. Within the 21st century, we have made great strides into understanding what controls the ways crystals can nucleate and grow and how minerals finally respond to changes in their chemical and physical environment through dissolution-reprecipitation processes. In this session, we invite theoretical and experimental studies of crystal nucleation and growth. Investigations treating applied aspects of crystallization in engineered or natural systems as well as studies that provide fundamental insights into the thermodynamics and kinetics of these processes are welcome equally. Abstract submission is open on www.geominkoeln2022.de until May 31st. Kind regards, Helen King (Utrecht), Elena Sturm (München), Guntram Jordan (München) -- Prof. Dr. Guntram Jordan Dept. f. Geo- u. Umweltwissenschaften Ludwig-Maximilians-Universitaet Theresienstr. 41 80333 Muenchen Tel. +49 (0)89 2180 4353 Fax. +49 (0)89 2180 4334