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Elastic‐constant systematics in f.c.c. metals, including lanthanides–actinides
Author(s) -
Ledbetter Hassel,
Migliori Albert
Publication year - 2008
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200743075
Subject(s) - lanthanide , actinide , dimensionless quantity , chemistry , covalent bond , thermodynamics , crystallography , materials science , atomic physics , inorganic chemistry , physics , ion , organic chemistry
For f.c.c. metals, using Blackman's diagram of dimensionless elastic‐constant ratios, we consider the systematics of physical properties and interatomic bonding. We focus especially on the lanthanides–actinides La, Ce, Yb, Th, U, Pu, those for which we know some monocrystal elastic constants. Their behavior differs from the other f.c.c. metals, and all except La show a negative Cauchy pressure, contrary to most f.c.c. metals, which show a positive Cauchy pressure. Among the lanthanides–actinides, δ‐Pu stands apart, consistent with its many odd physical properties. Based on elastic‐constant correlations, we suggest that δ‐Pu possesses a strong s‐electron interatomic‐bonding component together with a covalent component. Elastically, δ‐Pu shows properties similar to Yb. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)