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Hydration phase transitions and magnetic properties of vermiculite intercalation compounds

Published online by Cambridge University Press:  31 January 2011

N. Wada ,
Masatsugu Suzuki ,
D. R. Hines ,
K. Koga  and
H. Nishihara
N. Wada
Affiliation:
Schlumberger-Doll Research, Old Quarry Road, Ridgefield, Connecticut 06877-4108
Masatsugu Suzuki
Affiliation:
Schlumberger-Doll Research, Old Quarry Road, Ridgefield, Connecticut 06877-4108
D. R. Hines
Affiliation:
Schlumberger-Doll Research, Old Quarry Road, Ridgefield, Connecticut 06877-4108
K. Koga
Affiliation:
Institute for Solid State Physics, University of Tokyo, Minato-ku, Tokyo 106, Japan
H. Nishihara
Affiliation:
Institute for Solid State Physics, University of Tokyo, Minato-ku, Tokyo 106, Japan
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Abstract

Experimental results from x-ray scattering, Raman scattering, neutron scattering, and magnetic susceptibility measurements are presented to discuss hydration states and magnetic orderings in vermiculite intercalation compounds. In Na-vermiculite, the hydration transitions between 2- and I-water layer hydration states (WLHS), and 1- and 0-WLHS were studied as a function of temperature from 22–200°C. The transitions are of first order, exhibiting phase coexistence and large hysteresis. In Ni-vermiculite, de susceptibility measurements showed both magnetic-field directions and hydration dependencies. Also, ac susceptibility and small-angle neutron scattering experiments revealed evidence for magnetic phase transitions in a temperature range between 1.5 and 4 K.

Type
Articles
Information
Journal of Materials Research , Volume 2 , Issue 6 , December 1987 , pp. 864 - 870
Copyright
Copyright © Materials Research Society 1987

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References

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