The synthetic creation of these was pioneered in the 1940s by Richard Barrer, who demonstrated that alkyl-ammonium compounds could be used as templates.
The synthetic creation of these was pioneered in the 1940s by Richard Barrer, who demonstrated that alkyl-ammonium compounds could be used as templates. They were first named by Swedish chemist Axel Cronstedt and naturally occur in families like harmotome, gismondine and chabazite. They are often used in cracking processes as shape selective catalysts and are mineralogically defined as having a one-half ratio of silicon and aluminum to oxygen. Named from the Greek for "boiling stones," they are types ►of molecular sieves and typically have large cages and vacant spaces capable of containing and exchanging ions. FTP, name these crystalline tectosilicates.
The synthetic creation of these was pioneered in the 1940s by Richard Barrer, who demonstrated that alkyl-ammonium compounds could be used as templates.
zeolites 