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Thermal Expansion, Heat of Fusion, and Electron Density of Monovalent Metals
Author(s) -
Mimkes J.
Publication year - 1988
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.2221480107
Subject(s) - thermal expansion , heat capacity , melting point , electron , alkali metal , thermodynamics , enthalpy of fusion , enthalpy , fermi energy , fusion , volume (thermodynamics) , chemistry , specific heat , condensed matter physics , fermi level , materials science , physics , nuclear physics , linguistics , philosophy , organic chemistry
The enthalpy of monovalent metals is calculated as a function of electron density according to the model of nearly free electrons. The coefficient of thermal expansion of solid and liquid monovalent metals is given by heat capacity and Fermi energy, α P ( T ) = 2.5 × C P ( T )/ϵ F ( T ). The heat of fusion is determined by Fermi energy and relative change in volume at the melting point, L m = 0.4ϵ F ( T m ) × ( V L − V S )/ V L . The agreement with experimental data is quite satisfactory for all alkali and noble metals.