DDL and isomorphic substitution
In regards to Question 2, C on the 2006 midterm: Through isomorphic substitution does the new negative charge of the crystalline structure create a diffused double layer? Or is the DDL always there and then becomes larger with the new negative charge? Thanks
PhoebeAyer (talk)
Isomorphic substitutions lead to formation of negative charges on phyllosilicates. These negative charges then attract electrostatically cations and those attracted cations form DDL.
Particles without any charges (e.g. sand) do not have any attracted ions on their surfaces or, in other words, sand particles do not have DDL