The expansion mechanism of hydroxide expanding phase for oil well cement slurry are discussed on the basis of principle of chemical thermodynamics and topochemical reaction model.
Previous studies had hypothesized that minor components could either help or hinder the crystallization process, by creating or blocking sites for crystal growth.
There's a variety of fossilization processes and the most common is permineralization, where crystals grow into the pore spaces within the hard parts of an animal.