New data are presented that suggest the reaction analcime+quartz=albite+liquid water is in equilibrium near 190 degrees C or possibly at even lower temperatures. On the basis of these data, a phase diagram showing the field of stability of the assemblage analcime-quartz is constructed. The delta G degrees of the above reaction estimated from these data is 330 calories, and factors that may influence equilibria such as salinity, silica activity, solid solutions, and order-disorder are considered. Experimental difficulties associated with studies of zeolite equilibria are considered in the light of entropy data.
No takes yet. Share an insight, caveat, or question.
Campbell et al. (1965) studied this question.