The zeolites are a group of more than 35 soft, white minerals comprised mostly of aluminum, silicon, and oxygen and having a crystal structure featuring spacious pores or rings. Zeolites often form as crystals in small cavities in basaltic rocks or as...

These are also called molecular sieves because of their intricate pore structure. Both naturally occurring and synthetic zeolites function as ion exchangers. Early zeolites were natural, the most widely used being glauconite. see Ion...

Zeolites (Greek, zein, "to boil"; lithos, "a stone") are minerals that have a micro-porous structure. The term was originally coined in the 18th century by a Swedish mineralogist named Axel Fredrik Cronstedt who observed, upon rapidly heating a natural...