<div class="csl-bib-body">
<div class="csl-entry">Franceschi, G., Conti, A., Lezuo, L., Abart, R., Mittendorfer, F., Schmid, M., & Diebold, U. (2023, December 11). <i>How water binds on defect-free K-feldspars</i> [Presentation]. Conference: Kick-off meeting of FWF grant about feldspars&ice (joint between Uni Wien and KIT) 2023, Wien, Austria. https://doi.org/10.1021/acs.jpclett.3c03235</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/193658
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dc.description.abstract
Microcline feldspar (KAlSi3O8) is a common mineral with important roles in
Earth’s ecological balance. It participates in carbon, potassium, and water cycles, contributing
to CO2 sequestration, soil formation, and atmospheric ice nucleation. To understand the
fundamentals of these processes, it is essential to establish microcline’s surface atomic structure
and its interaction with the omnipresent water molecules. This work presents atomic-scale
results on microcline’s lowest-energy surface and its interaction with water, combining
ultrahigh vacuum investigations by noncontact atomic force microscopy and X-ray
photoelectron spectroscopy with density functional theory calculations. An ordered array of
hydroxyls bonded to silicon or aluminum readily forms on the cleaved surface at room
temperature. The distinct proton affinities of these hydroxyls influence the arrangement and
orientation of the first water molecules binding to the surface, holding potential implications
for the subsequent condensation of water.
