Abstract
We have investigated the magnetic properties and structural changes of iron pillared montmorillonites in terms of likely exchange interactions between magnetic ions and/or magnetic ions separated by oxygen ions, as well as their distribution in the unit cell. Iron pillared montmorillonites were synthesized by two different methods. The first one consists of expanding Na+ and Ca2+ montmorillonite with ethylene glycol from 12.5 and 15 Å respectively to 17 Å. An iron polycation solution is prepared by hydrolyzing a solution of FeCl3 with Na2CO3 to yield Fe n (OH) m (3n−m)+. The treated montmorillonite is then stirred into the polycation solution. The X-ray powder pattern shows an expansion to 24–25 Å. Secondly CO2 is bubbled into a solution of tetrabutylammonium hydroxide (TBAOH) or tetramethylammonium hydroxide (TMAOH) and a solution of FeCl3 is stirred into it. The montmorillonite is added to this solution. The X-ray powder pattern shows spacings varying from 17 Å (TBAOH) and 14 Å (TMAOH) to 15 Å and 16 Å. Both procedures yield montmorillonites containing intercalated iron in the gallery space. Quantitative spectrophotometric analyses of the intercalated phases show varying amounts of iron in the gallery spaces. The straight line sections of the curve of inverse magnetic susceptibility versus temperature show a negative Weiss constant for Na+ montmorillonite and for the phases prepared using the TBAOH and TMAOH solutions. A positive Weiss constant is seen for the montmorillonite material prepared with the polycation solutions.
Keywords
- Tetramethylammonium Hydroxide
- Weiss Constant
- Tetrabutylammonium Hydroxide
- Trinuclear Cluster
- Inverse Magnetic Susceptibility
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
E. G. Rightor, Mling-Shin Tzou, and T.J. Pinnavaia, J. Catal. 130, 29 (1991).
N. Wada, M. Suzuki, and D. R. Hines, J. Mater. Res. 2, 864 (1987).
M. Takahashi, S. Onuki, S. Ishio, K. Ohtsuka, M. Suda, and M. Ono, J. Magn. Magn. Mater. 75, 115 (1988).
M. Takahashi, S. Ishio, K. Ohtsuka, M. Suda, and M. Ono, J. Appl. Phys. 64, 5766 (1988).
T.J. Pinnavaia, Science 220, 365 (1983).
K. Itaya and J. Bard, J. Phys. Chem. 89, 5565 (1985).
K. Ohtsuka, M. Suda, M. Ono, M. Takahashi, M. Sato, and S. Ishio, Bull. Chem. Soc. Jpn. 60, 871 (1987).
Crystal Structures of Clay Minerals and their X-ray Identification, G. W. Brindley and G. Brown, editors, (Mineralogical Society, London, 1980).
J. E. Gieseking, Soil. Sci. 47, 1 (1939).
Principles of Instrumental Analysis, 4th edition, D. A. Skoog and J. J. Leary (Saunders College Publishing, Tokyo, 1992), p. 162.
AccuPyc 1330 Pycnometer for 1-cc samples. Operator’s manual, (1992).
J. Y.Lee, J. S. Swinnea, H. Steinfink, W. M. Reiff, S. Pei and J. D. Jorgensen, J. Solid State Chem. 103, 1 (1993).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1994 Springer Science+Business Media New York
About this chapter
Cite this chapter
Govea, L., Steinfink, H. (1994). Synthesis and Magnetic Properties of Iron Pillared Montmorillonites. In: Morán-López, J.L., Sanchez, J.M. (eds) New Trends in Magnetism, Magnetic Materials, and Their Applications. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1334-0_36
Download citation
DOI: https://doi.org/10.1007/978-1-4899-1334-0_36
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4899-1336-4
Online ISBN: 978-1-4899-1334-0
eBook Packages: Springer Book Archive