Specific properties of nets and their analysis

This section should be either very long or veiy brief and we opt for the latter, Bach class of specific properties has its own set of methods (SQUID magnetometer for magnetism etc) and we will not go into details concerning these. 

A few words concerning porosity may finally be useful since this may not be completely dear to everyone. If a material is porous (or to be really explicit have permanent porosity ) this means that you can remove whatever it is that sits in the channels and get them completely empty and then put something else in there with only minor perturbations of the structure. 

If you want to claim a porous crystalline material it is probably a good idea 

I lave a crystal structure with filled channels. 

I lave another crystal structure or powder diffraction data demonstrating the same structure but with empty channels. 

---