[Pw_forum] BFGS ionic relax: maximum number of steps?

2011-10-18 Thread Xijun Wang
000 So, I have to copy all coordinates into a new input to run it "from_scratch", then it will run normally, terminate after a lot of iterations. Anything wrong with my input file? A compilation error? Or it just means that the convergence has been reached? Regards, Xijun W

[Pw_forum] problems with vc-relax

2011-09-09 Thread Xijun Wang
Hi, You are right. Tests should be done. I was suggesting "start" from gamma k-points to make a quick relaxation. After this, relaxation with larger k-points could be followed if necessary. Regards, Xijun On Thu, Sep 8, 2011 at 7:35 PM, WF wrote: > Is it good enough to relax an arbitrary

[Pw_forum] problems with vc-relax

2011-09-08 Thread Xijun Wang
On Thu, Sep 8, 2011 at 10:26 AM, Elie Moujaes wrote: > Hello Xijun, Hello Elie, > I did not send the e-mail twice intentionally. There was a problem with my > e-mail and it kept giving me an error about problems with Windows hotmai > hence why it was sent twice without me knowing except now

[Pw_forum] problems with vc-relax

2011-09-07 Thread Xijun Wang
Hi, Elie, Please do not repeat sending the same message to the mail list. Also, people will be more happy to help you if you keep your mail neat by removing all the unnecessary blank lines in the input file. Regards, Xijun On Wed, Sep 7, 2011 at 3:28 PM, Elie Moujaes wrote: > Dear all, > > >

[Pw_forum] problems with vc-relax

2011-09-07 Thread Xijun Wang
On Wed, Sep 7, 2011 at 3:28 PM, Elie Moujaes wrote: > Dear all, > Dear Elie, > > I am relaxing a 60 atom supercell (graphene grain boundary) to make the > total force on atoms mainly 0.001 Ry/au. However the vc-relax stopped after > 4 days of execution and without reaching the desired force

[Pw_forum] ATOMIC_POSITIONS after 'final coordinates'

2011-09-07 Thread Xijun Wang
Thanks Paolo. If this is true, then the 'final coordinates' is not actually final. -Xijun On Wed, Sep 7, 2011 at 11:45 AM, Paolo Giannozzi wrote: > Most likely the damped dynamics algorithm updates the > atomic positions one last time before printing them > > P. > --- > Paolo Giannozzi, Dept

[Pw_forum] ATOMIC_POSITIONS after 'final coordinates'

2011-09-07 Thread Xijun Wang
On Wed, Sep 7, 2011 at 4:54 AM, Paolo Giannozzi wrote: > > On Sep 7, 2011, at 1:35 , Xijun Wang wrote: > >> There is an extra "ATOMIC_POSITIONS" section after the "final >> coordinates". It is neither the final coordinates > > why are you sa

[Pw_forum] ATOMIC_POSITIONS after 'final coordinates'

2011-09-06 Thread Xijun Wang
ing coordinates, nor cystal coordinates. What's that? See below the output file. I'd appreciate it if someone can tell me where to find the explanation to the output file in the manual. I have searched the maillist and manual online but find no answer. Xijun Wang -- Department of Chemistry and Bio