Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (15) Citing Articles via Google Scholar Google Scholar Articles by Tamura, K. Articles by Nakazawa, H. Search for Related Content GeoRef GeoRef Citation

STEPWISE HYDRATION OF HIGH-QUALITY SYNTHETIC SMECTITE WITH VARIOUS CATIONS

¹ Central Research Laboratory, Kawasaki, Showa Denko K.K., 3-2 Chidori-cho, Kawasaki-ku, Kawasaki, Kanagawa, 210-0865 Japan
² National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044 Japan

E-mail of corresponding author: tamurak2{at}kpl.sdk.co.jp

Smectites synthesized from experiments at 5.5 GPa and 1500°C are of high quality, crystals are large at >10 µm, and the 2:1 layers may have a homogeneous charge distribution. Smectite was exchanged with various cations (Na⁺, Li⁺, K⁺, Ca²⁺, and Mg²⁺) and the hydration behavior of each sample was observed by an in situ powder X-ray diffraction method under precisely controlled relative humidity (RH). The smectite showed distinct stepwise (discontinuous) hydration versus RH. During the transition between two hydration states, the coexistence of the two states was observed. Randomly interstratified structures with one and two planes of H₂O are time-dependent phenomena and relate to hydration and dehydration processes.

Key Words: Crystalline Swelling • Hydration • Interlayer Cation • Smectite

This article has been cited by other articles:

				S. Morodome and K. Kawamura SWELLING BEHAVIOR OF Na- AND Ca-MONTMORILLONITE UP TO 150{degrees}C BY IN SITU X-RAY DIFFRACTION EXPERIMENTS Clays and Clay Minerals, April 1, 2009; 57(2): 150 - 160. [Abstract] [Full Text] [PDF]

				E. Ferrage, C. A. Kirk, G. Cressey, and J. Cuadros Dehydration of Ca-montmorillonite at the crystal scale. Part I: Structure evolution American Mineralogist, July 1, 2007; 92(7): 994 - 1006. [Abstract] [Full Text] [PDF]

				P. Komadel, J. Madejova, and J. Bujdak PREPARATION AND PROPERTIES OF REDUCED-CHARGE SMECTITES - A REVIEW Clays and Clay Minerals, August 1, 2005; 53(4): 313 - 334. [Abstract] [Full Text] [PDF]

				E. Ferrage, B. Lanson, B. A. Sakharov, and V. A. Drits Investigation of smectite hydration properties by modeling experimental X-ray diffraction patterns: Part I. Montmorillonite hydration properties American Mineralogist, August 1, 2005; 90(8-9): 1358 - 1374. [Abstract] [Full Text] [PDF]

				C. Tournassat, C. Tournassat, A. Neaman, F. Villieras, D. Bosbach, and L. Charlet Nanomorphology of montmorillonite particles: Estimation of the clay edge sorption site density by low-pressure gas adsorption and AFM observations American Mineralogist, November 1, 2003; 88(11-12): 1989 - 1995. [Abstract] [Full Text] [PDF]

				P. KOMADEL, J. HROBARIKOVA, L. SMRCOK, and B. KOPPELHUBER-BITSCHNAU Hydration of reduced-charge montmorillonite Clay Minerals, September 1, 2002; 37(3): 543 - 550. [Abstract] [Full Text] [PDF]