Open AccessNi clay neoformation on montmorillonite surface
Author(s) -
Dähn Rainer,
Scheidegger André,
Manceau Alain,
Schlegel Michel,
Baeyens Bart,
Bradbury Michael H.
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049500017817
Subject(s) - montmorillonite , extended x ray absorption fine structure , sorption , silicate , clay minerals , suspension (topology) , ionic bonding , chemistry , absorption (acoustics) , chemical engineering , aluminosilicate , materials science , absorption spectroscopy , mineralogy , adsorption , ion , organic chemistry , catalysis , composite material , optics , physics , mathematics , homotopy , pure mathematics , engineering
Polarized extended X‐ray absorption fine structure spectroscopy (P‐EXAFS) was used to study the sorption mechanism of Ni on the aluminous hydrous silicate montmorillonite at high ionic strength (0.3 M NaClO 4 ), pH 8 and a Ni concentration of 0.66 mM. Highly textured self‐supporting clay films were obtained by slowly filtrating a clay suspension after a reaction time of 14 days. P‐EXAFS results indicate that sorbed Ni has a Ni clay‐like structural environment with the same crystallographic orientation as montmorillonite layers.