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Atomistic expression of thermal expansion of metallic elements
Author(s) -
Plendl J. N.
Publication year - 1973
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.2220570118
Subject(s) - thermal expansion , valency , expression (computer science) , coordination number , thermodynamics , thermal , metal , atomic number , lanthanide , function (biology) , chemistry , atomic mass , materials science , atomic physics , physics , metallurgy , ion , linguistics , philosophy , organic chemistry , evolutionary biology , biology , computer science , programming language
As it was shown very recently, the coefficient of the thermal expansion of metallic elements is proportional to the valency which is effective between any two next neighbor atoms within the atomic coordination of crystalline structure, at ambient conditions of pressure and temperature. Presently, the Grueneisen parameter γ is shown to be a function of the atomic coordination number. Combining the two results leads to an expression for the thermal expansion based entirely on absolute constants and atomic parameters. Seventy percent of 48 elements, examined in this way, obey a single atomistic expression. The remaining thirty percent, belonging to group II, subgroup IVB, and to the lanthanides, have, in principle, the same expression, however, with different numerical factors, indicating a relative reduction of the thermal expansion, which increases in that order.