Infrared and adsorption studies of a New Zealand erionite 

Aldridge, L. P.; Pope, C. G. 

1981 

 

 

Article in journal 

Gas adsorption, thermogravimetric analyses, and infrared spectroscopy have been carried out on an erionite from an almost pure deposit of this material which has recently been found at Kaipara, New Zealand, and on some of its ion-exchanged (Ca, Mg, K, Ag, and NH/sub 4/) derivatives. All samples were good adsorbents for water, carbon dioxide, and ammonia. No molecular sieving effects were observed in potassium-exchanged erionite samples. This is in conflict with other workers' observations. The infrared spectrum obtained after adding small amounts of water to dehydrated ammonium erionite showed some novel features. Unlike the spectra of the other erionites there was no sharp band at 1640 cm/sup -1/ caused by the bending of water. Instead bands at 1350, 1680, and 2400 cm/sup -1/ were observed, as well as a new hydroxyl band at 3660 cm/sup-1/. (auth) 

 

infrared spectroscopy; x-ray diffraction; erionite; nzms262 03; water; ammonia; adsorption; zeolites; thermogravimetry; Biogeophysical; Kaipara flats; ion exchange; nzms260q09; carbon dioxide