[Pw_forum] regarding bulk modulus

[Shyam Khambholja]

Hi all,
         I have performed total energy calculation for Al as a function of
lattice parameter. then i fit those data to murnaghan equation of state and
got bulk modulus. when i use method of hydrostatic strain and got bulk
modulus, it is much smaller than the one obtained by fitting E-a curve to
murnaghan eos. So, which one is more reliable, since, bulk modulus obtained
by fitting to mur. eos is quite near to experimental data. and which one
should be used to determine other elastic stiffness constant ?

Thanks in advance

-- 
Mr. Shyam G Khambholja
Reseach student,
Depratment of Physics,
Sardar Patel University
India
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