INFRARED-SPECTROSCOPY STUDY OF TETRAHEDRAL AND OCTAHEDRAL SUBSTITUTIONS IN AN INTERSTRATIFIED ILLITE-SMECTITE CLAY

Authors
SRASRA E BERGAYA F FRIPIAT JJ
Citation
E. Srasra et al., INFRARED-SPECTROSCOPY STUDY OF TETRAHEDRAL AND OCTAHEDRAL SUBSTITUTIONS IN AN INTERSTRATIFIED ILLITE-SMECTITE CLAY, Clays and clay minerals, 42(3), 1994, pp. 237-241
Citations number
15
Categorie Soggetti
Mineralogy
Journal title
Clays and clay minerals → ACNP
ISSN journal
00098604
Volume
42
Issue
3
Year of publication
1994
Pages
237 - 241
Database
ISI
SICI code
0009-8604(1994)42:3<237:ISOTAO>2.0.ZU;2-W
Abstract
Infrared spectroscopy is used to distinguish between octahedral and te trahedral substitutions in an interstratified illite-smectite clay. Th e Hofmann-Klemen (Li) test suggests that the AlMg square and FeMg squa re octahedral vacancies are preferentially occupied by Li after therma l treatment at 250-degrees-C. The ammonium (Chourabi-Fripiat) test rev eals the beidellitic character by the formation of two OH stretching m odes upon deammonation. The illitic layers are not affected since K is not exchangeable.