**Chapter 3**

Calcium Uptake on Kaolinite and Gibbsite: Effects of Sulfate, pH, and Salt Concentration with Additional Insight from Second Harmonic Generation on Temperature Dependencies with Sapphire-Basal Planes and the Potential Relevance to Ice Nucleation

*Ahmed Abdelmonem, Yujun Wang, Johannes Lützenkirchen and Marcelo Eduardo Alves*
