Measurement of the elastic constants of argon from 3 to 77 degrees K
- 1 March 1970
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 3 (3), 510-522
- https://doi.org/10.1088/0022-3719/3/3/004
Abstract
The velocity of sound has been measured in argon single crystals by the pulse-echo technique for both longitudinal and transverse waves from 3 to 77 degrees K. The values of the elastic constants obtained by extrapolation of the results to 0 degrees K are: c11=4.39, c12= 1.83 and C44=1.64, in units of 109N m-2. Comparison with several lattice dynamical models indicates that models incorporating only central two-body forces are inadequate. New values for the adiabatic bulk modulus permit more accurate calculation of the Debye characteristic temperature and the Gruneisen parameter.Keywords
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