Layer charge estimation of smectites using infrared spectroscopy

Authors
Petit, S Righi, D Madejova, J Decarreau, A
Citation
S. Petit et al., Layer charge estimation of smectites using infrared spectroscopy, CLAY MINER, 33(4), 1998, pp. 579-591
Citations number
40
Categorie Soggetti
Earth Sciences
Journal title
CLAY MINERALS
ISSN journal
00098558 → ACNP
Volume
33
Issue
4
Year of publication
1998
Pages
579 - 591
Database
ISI
SICI code
0009-8558(199812)33:4<579:LCEOSU>2.0.ZU;2-D
Abstract
A new method of measuring the layer charge of smectites by IR spectroscopy is proposed based on the integrated intensity measurement of the band assig ned to the ammonium fundamental upsilon(4) mode of NH4+-exchanged clays. Me asurements are made before and after Li fixation (Hofman & Klemen effect). These allow the quantitative determination of the total charge, equivalent to CEC, and tetrahedral and octahedral charge distribution in both dioctahe dral and trioctahedral smectites.