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Infrared evidence of dioctahedral-trioctahedral site occupancy in palygorskite

A. Chahi, S. Petit and A. Decarreau
Infrared evidence of dioctahedral-trioctahedral site occupancy in palygorskite
Clays and Clay Minerals (June 2002) 50 (3): 306-313

Abstract

A Mg-rich palygorskite sample from phosphorite deposits of Ganntour (Morocco) with the structural formula Si (sub 8) (Mg (sub 2.6) Al (sub 1.19) Fe (sub 0.33) (super III) [] (sub 0.88) )Ca (sub 0.056) Na (sub 0.24) K (sub 0.104) O (sub 20) (OH) (sub 2) (OH (sub 2) ) (sub 4) .4H (sub 2) O, was studied by FTIR spectroscopy. In both OH-stretching and OH-bending regions, there is evidence of dioctahedral Al (sub 2) []OH, AlFe[]OH and trioctahedral Mg (sub 3) OH features, leading to a di-trioctahedral crystallochemical model of octahedral site occupancies in ribbons of Ganntour palygorskite. This model, established through the IR spectroscopy study of a Mg-rich palygorskite, seems to be appropriate for many other palygorskites with lower Mg content in the octahedral sheet.


ISSN: 0009-8604
EISSN: 1552-8367
Coden: CLCMAB
Serial Title: Clays and Clay Minerals
Serial Volume: 50
Serial Issue: 3
Title: Infrared evidence of dioctahedral-trioctahedral site occupancy in palygorskite
Affiliation: Universite Cadi Ayyad, Faculte des Sciences Semlalia, Marrakech, Morocco
Pages: 306-313
Published: 200206
Text Language: English
Publisher: Clay Minerals Society, Clarkson, NY, United States
References: 37
Accession Number: 2002-064829
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Secondary Affiliation: Universite de Poitiers, FRA, France
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200220
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