What is the layer spacing between calcium based bentonite and sodium bentonite?
Montmorillonite is the main component of montmorillonite. It belongs to the monoclinic system, the change of interlayer spacing is great, and 0.96nm when the water is anhydrous;
When the interlayer cation is mainly calcium, it can contain two layers of water molecules, and the interlayer spacing is 1.55nm;
When the interlayer cations are mainly sodium, they can contain monolayer water molecules, and can also contain two or three layers of water molecules. The interlayer spacing is 1.8--1.9nm. When the organic molecules are adsorbed, the distance between layers is 4.3nm.
