Effect of pressure on high-temperature polymorphic transformations in rare-earth elements

The effect of pressure on the melting temperature T^sub m^, the high-temperature phase transition temperature T^sub k^, and the temperature range T^sub m^-T^sub k^ of a rare-earth element is considered as a function of its ordinal number in the periodic table. The range T^sub m^-T^sub k^ is found to...

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Bibliographic Details
Published in:Russian metallurgy Metally 2006-03, Vol.2006 (2), p.138-142
Main Authors: Sirota, N N, Morozov, A V, Sirota, I M
Format: Article
Language:English
Subjects:
Atomization
Compressing
Electron density
Melting
Minerals
Periodic table
Physical properties
Rare earth metals
Transformations
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Summary:The effect of pressure on the melting temperature T^sub m^, the high-temperature phase transition temperature T^sub k^, and the temperature range T^sub m^-T^sub k^ of a rare-earth element is considered as a function of its ordinal number in the periodic table. The range T^sub m^-T^sub k^ is found to correlate with the coefficients [partial differential]T^sub m^/[partial differential]p and [partial differential]T^sub k^/[partial differential]p, the atomization heat ΔH^sub at^, the melting heat ΔH^sub m^, the bulk compression modulus K, the work function A^sub e^, and the valence electron density. The role of a mixed valence in changes in the physical properties of rare-earth elements is emphasized depending on the ordinal number.[PUBLICATION ABSTRACT]
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029506020066