Ιδρυματικό Αποθετήριο [SANDBOX]
Πολυτεχνείο Κρήτης
EN  |  EL

Αναζήτηση

Πλοήγηση

Ο Χώρος μου

A simple approach to the identification of trioctahedral smectites by X-ray diffraction

Christidis Georgios, Eleni Koutsopoulou

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/D711D0B3-DDFD-4D9F-ADFB-96C7DFDC3EE9-
Αναγνωριστικόhttps://doi.org/10.1180/claymin.2013.048.5.22-
Γλώσσαen-
Μέγεθος10 pagesen
ΤίτλοςA simple approach to the identification of trioctahedral smectites by X-ray diffractionen
ΔημιουργόςChristidis Georgiosen
ΔημιουργόςΧρηστιδης Γεωργιοςel
ΔημιουργόςEleni Koutsopoulouen
ΕκδότηςMineralogical Societyen
ΠερίληψηA new method for identifying the trioctahedral smectites saponite, stevensite and hectorite is proposed in this study. The method is based on differences in the X-ray diffraction (XRD) patterns of the three smectites after (a) heating at 500°C for 90 min and (b) glycerol solvation of the Cs-forms of the smectites for 20 h. After heating at 500°C, well below the dehydroxylation temperature of the three smectites, saponite and hectorite re-expand upon ethylene glycol (EG) solvation, whereas stevensite layers remain collapsed. Saponite forms one-layer and hectorite two-layer complexes after Cs-saturation and glycerol solvation. Cs-stevensite displays a gradual increase in d 001 with increasing solvation time in glycerol vapours and forms two-layer glycerol complexes with prolonged solvation. Except for the individual Mg-smectites, the proposed method may be used to identify compositional heterogeneity that may exist in the smectites. Furthermore, it should be useful in identifying the individual trioctahedral Mg-smectites when present in mixtures, and in detecting interstratified layers of different Mg-trioctahedral smectites. Application of the method revealed that the SYnL-1 laponite (CMS Source Clay Project) is not homogeneous but consists of hectorite, stevensite and possibly mixed-layer hectorite/stevensite layers.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-10-01-
Ημερομηνία Δημοσίευσης2013-
Βιβλιογραφική ΑναφοράG. Christidis, E. Koutsopoulou, " A simple approach to the identification of trioctahedral smectites by X-ray diffraction " ,C. Min., vo.48 ,no.5 ,pp. 687-696 ,2013.doi:10.1180/claymin.2013.048.5.22en

Υπηρεσίες

Στατιστικά