1. The sorptions of ammonia, carbon dioxide, sulphur dioxide, acetylene, oxygen and hydrogen under one atmospheric pressure at 25°C. by the dehydrated samples of laumontite, stilbite, mordenite, natrolite, apophyllite, analcite, inesite and bentonite have been measured. 2. All samples except analcite sorb ammonia in considerable quantities. 3. Mordenite sorbs ammonia, carbon dioxide, sulphur dioxide, acetylene and oxygen. 4. Bentonite sorbs ammonia, carbon dioxide and sulphur dioxide. 5. From the sorption amounts of gases and the forms of sorption velocity curves it is concluded that the ammonia combines chemically with laumontite, stilbite, natrolite, apophyllite and inesite. 6. Various gases which are sorbed by dewatered mordenite enter into the cavities among the molecular gratings of mordenite crystals, forming solid solutions. Thus we have found another sorbent of chabazite class. 7. Bentonite is one of the sorbent of silica gel class, being so-called amorphous or microcrystalline structure.