title: IR study of dickite-formamide intercalate, Al2Si2O5(OH)4-H2NCOH.
abstract: Direct intercalation of formamide (FAM) in dickite occurs spontaneously when samples are treated by ultrason. The X-ray diffraction patterns show that this intercalation increases the d001 spacing from 7.19 to 10.77 A. It is concluded from infrared studies that hydrogen bonds are formed between C=O groups of formamide and inner surface hydroxyls of dickite, indicated by the shift of the hydroxyl bands from 3708, 3654 cm(-1) and 3622 for natural dickite to 3575, 3520, 3450 and 3612 cm(-1) for FAM-intercalated dickite.
authors.affiliation: Université Cadi Ayyad, Faculté des Sciences, Département de Chimie, Marrakech, Morocco.
authors.forename: M
authors.initials: M
authors.lastname: Zamama
authors.forename: M
authors.initials: M
authors.lastname: Knidiri
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry; D000077215:Clay; D005559:Formamides / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D014961:X-Ray Diffraction
chemical_list: D000538:Aluminum Silicates; D005559:Formamides; C031066:formamide; D000077215:Clay