Volume 6, Issue 4, July 2017, Page: 165-170
Schematic Interpretation of Anomalies in the Physical Properties of Eu and Yb Among the Lanthanides
Yoshiharu Mae, Maetech, Mimuro, Midori Ward, Saitama City, Japan
Received: May 24, 2017;       Accepted: Jun. 2, 2017;       Published: Jun. 19, 2017
DOI: 10.11648/j.ijmsa.20170604.11      View  2256      Downloads  97
Abstract
Lanthanides are the elements in 6th period and the 3rd group of the periodic table. Eu and Yb exhibit some unusual properties compared with the other lanthanides. The author has proposed a diagram to systematically illustrate the properties of the elements, by plotting the Young’s modulus on the ordinate and thermal conductivity on the abscissa. Eu and Yb have much lower Young’s moduli, and are located far from other lanthanides on the diagram. Most lanthanides have hexagonal structures. Eu, however, has a body-centered cubic structure, because it is located on the extension of the curve of alkali metals. Yb has a face-centered cubic (fcc) structure, because it is located on the curve of fcc metals. The positions of Eu and Yb on the diagram are thought to act as a bridge between the lanthanides and other adjacent element groups. As a result, Eu and Yb work as if they were members in the adjacent element groups, which leads to their large atomic radii and their low melting points, etc.
Keywords
Eu, Yb, Lanthanides Crystal Structure, Atomic Radius, Melting Point
To cite this article
Yoshiharu Mae, Schematic Interpretation of Anomalies in the Physical Properties of Eu and Yb Among the Lanthanides, International Journal of Materials Science and Applications. Vol. 6, No. 4, 2017, pp. 165-170. doi: 10.11648/j.ijmsa.20170604.11
Copyright
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Reference
[1]
Y. Mae, “What the Darken-Gurry plot means about the solubility of elements in metals,” Metall. Mater. Trans. A, vol. 47, pp. 6498-6506, Dec., 2016.
[2]
Japan Institute of Metals, Metals data book, 3rd ed., Maruzen, Tokyo, 1993, pp. 36-43.
[3]
Tokyo-kagaku-doujin, Big chemical dictionary, Tokyo-kagaku-doujin, Tokyo, 1989, p. 190.
[4]
K. N. R. Taylor, M. L. Darby, Physics of rare earth solids, Chapman and Hall, London, 1972, pp. 60-62.
[5]
J. Bernstein, Plutonium, Sangyo-tosho, Tokyo, 2008, p. 174.
[6]
E. C. Subbarao and W. E. Wallace, Science and technology of rare earth materials, Academic Press, New York, 1980, pp. 53-54.
[7]
R. A. Cooley, D. M. Yost, H. W. Stone, “Europium(Ⅱ) salts”, Inorganic Synthesis, 2, pp69-73, 1946.
[8]
Japan Institute of Metals, Metals data book, 3rd ed., Maruzen, Tokyo, 1993, p. 5.
[9]
W. Hayden, W. G. Moffat, and J, Wulff, The structure and properties of materials, Vol. III Mechanical behavior, John Wiley and Sons, New York, 1965, pp. 26-31.
[10]
A. F. Holleman, E. Wiberg, N. Wiberg, Die Lanthanoide, Walter de Gruyter, Belrin, 1985, pp. 1265-1279.
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