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A Thermodynamic Understanding of Clay‐Swelling Inhibition by Potassium Ions
Author(s) -
Liu XianDong,
Lu XianCai
Publication year - 2006
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200601740
Subject(s) - swelling , potassium , hydrate , clay minerals , ion , chemistry , molecule , microstructure , chemical engineering , materials science , inorganic chemistry , crystallography , mineralogy , organic chemistry , composite material , engineering
Caged : Potassium ions are trapped in coordination cages composed of surface hexagons and water molecules in a smectite interlayer (see picture; blue K, red O, white H). This microstructure leads to a striking stability of the single‐layer K‐smectite hydrate and inhibits further swelling of the clay.