[Pw_forum] problem on phonon

Sanjeev Gupta physics.skgupta at gmail.com
Sat May 28 14:17:11 CEST 2011

Dear Sahoo,

Without knowing your input file, how one can judge. Please provide your
input file.
Further, not fully optimization may be one reason.

Dept. of Phys.
Bhavnagar University

On Sat, May 28, 2011 at 5:38 PM, bhabya sahoo <bdslipun at gmail.com> wrote:

> sir
> i  used to calculate the phonon calculation on a 4*4*4 grid in cscl phase
> but the unstability persists upto 500 gpa
> but it is the thermodyanamic stability after 140 gpa  kpoints 24*24*24
> what may be reseon i donot know
> please help me
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