| Numéro |
J. Phys. Colloques
Volume 41, Numéro C8, Août 1980
Fourth International Conference on Liquid and Amorphous Metals
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|---|---|---|
| Page(s) | C8-36 - C8-39 | |
| DOI | https://doi.org/10.1051/jphyscol:1980809 | |
J. Phys. Colloques 41 (1980) C8-36-C8-39
DOI: 10.1051/jphyscol:1980809
METAL-NONMETAL TRANSITION AND THE MISCIBILITY GAP IN LITHIUM-METHYLAMINE
J.R. Buntaine et M.J. SienkoBaker Laboratory of Chemistry, Cornell University, Ithaca, N.Y. 14853, USA
Abstract
The electron spin resonance of lithium-methylamine solutions has been investigated as a function of temperature and concentration. In the nonmetallic regime, the relaxation time increases with temperature in the metallic regime, it decreases. The former is attributed to motionally narrowed hyperfine interaction ; the latter, to lifetime broadened spin-orbit coupling. The change-over appears to occur in the range 13.4-15.6 mole % Li. Kinks in some of the Tle vs. T curves indicate that liquid-liquid phase separation occurs with a consolute point at approximately 200K and 13 mole % Li. Calculation of a Motttype model using an effective dielectric constant suggests that the metal-nonmetal transition should occur at approximately 12 mole % Li. Thus, as in metal-ammonia systems, the metal-nonmetal transition appears to be intimately connected with a miscibility gap.