[Wien] bulk modulus at different pressures

[Stefaan Cottenier]

It seems you are confusing some quantities. Look at the derivation of  
the Murnaghan equation at  
http://en.wikipedia.org/wiki/Birch%E2%80%93Murnaghan_equation_of_state  
, especially equation (4). The symbols in that equation correspond in  
the following way to wien2k: B0 = B (bulk modulus at zero pressure),  
B'0=BP (pressure derivative of the bulk modulus). Both parameters are  
determined by a murnaghan fit, and that equation (4) gives you the  
resulting pressure dependence of the bulk modulus.

Stefaan


> Dear WIEN2k group,
>   We can calculate the pressure using the following formula as   
> implemented in WIEN2k:
>   P=B/B’[(V0/V)^B’-1]
>   We would like to calculate the bulk modulus at a certain pressure.  
>  From the above relation we do not see any pressure dependence of  
> the  bulk modulus. However, from experiment we know that there  
> should be  such a pressure dependence.
>   Our question is this that:
>   How can we find bulk modulus at different pressures and not only   
> at the zero pressure?
>
>   Thank you for your attention in this respect.
>
>   Sincerely yours,
>   Yasir Saeed.
>
>
> Yasir Saeed
>
> Lecturer / Research Associate
> Departmetn of Physics
> GC University, Faisalabad
> Cell:+92 300-4490632 & +92 345 4041865
> Off: +92 41 9201372
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> Email: yasir_saeed54321 at gcuf.edu.pk
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> Web : www.gcuf.edu.pk/
>
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-- 
Stefaan Cottenier
Instituut voor Kern- en Stralingsfysica
K.U.Leuven
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