Potential Inert and Mobile Components

Chemical potential can currently be considered to contain about three terms (Prigogine and Defray, 1954)  

2) where RTlny x refers to the effect of variable composition 

3) where g refers to the importance of structural configuration of a phase upon the chemical potential of i. 

It is possible at present to assess the first factor for phyllosili- 

Since the chemical potential is an intensive variable, independent of the absolute number of ions present, it can be determined at one point in a system and will be valid for all phases present. This is very useful for geologists in that one need not determine the size of the system for a measurement. However, it is essential to know over what area or distance the chemical potential of an element is constant. The scale of the system must be known in order to use this measurement in an estimate of phase equilibrium. 

---