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Equilibrium vacancy concentration measurements on tin single crystals
Author(s) -
Balzer R.,
Sigvaldason H.
Publication year - 1979
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.2220920116
Subject(s) - vacancy defect , tin , tetragonal crystal system , materials science , melting temperature , lattice (music) , lattice constant , thermodynamics , condensed matter physics , chemistry , crystallography , crystal structure , physics , diffraction , optics , metallurgy , acoustics , composite material
Simultaneous length and lattice parameter change measurements are performed on tetragonal tin single crystals in a ‐ and c ‐direction from room temperature to melting temperature. Length and lattice parameter change measurements agree within experimental error for all temperatures. From this it can be concluded that the maximum vacancy concentration is less than 3 × 10 −5 , which is the maximum experimental uncertainty. Using the energy of formation E 1 f= 0.50 eV from other experiments an upper limit for the entropy of formation of s/k = 1.1 is calculated.