Re: [Wien] Large difference in calculated and experimental EFG

2019-03-18 Thread Ramsewak Kashyap
In 2x2x2 supercell, total no. of atoms was 24 and it gave EFG value 6.5 10**21V/m**2 with eta 0.81. I have also calculated for 3x3x2 supercell has 48 atoms and it gave EFG value 6.3 10**21V/m**2 with eta 0.88 While experimental is about EFG is 4.4 with eta 0.60.. On Mon 18 Mar, 2019, 7:39 PM

Re: [Wien] Reg: Will -qtl will work along with -so and -orb

2019-03-18 Thread Peram sreenivasa reddy
Dear Gavin Sir, I got the point. Thank you very much. Thanking you. On Tue, Mar 19, 2019 at 9:55 AM Gavin Abo wrote: > I suggest the readings: > https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg17735.html >

Re: [Wien] Reg: Will -qtl will work along with -so and -orb

2019-03-18 Thread Gavin Abo
I suggest the readings: https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg17735.html https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg18243.html https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg16889.html On 3/18/2019 9:32 PM, Peram sreenivasa reddy

[Wien] Reg: Will -qtl will work along with -so and -orb

2019-03-18 Thread Peram sreenivasa reddy
Dear Wien2k, I am trying to get the DOS for a system which i included -so and -orb. My scf calculation successfully completed with "runsp_lapw -so -orb -ec 0.01 -p". I tried "x lapw2 -qtl -so -orb -up -p". It is ended with an error "ERROR: -qtl and -orb switches are not compatible Unmatched

Re: [Wien] Large difference in calculated and experimental EFG

2019-03-18 Thread Peter Blaha
Most importantly: You talked about a 2x2x2 supercell ??? We don't know how big your original cell was, but a 16 atome cell with 1 T is not an impurity as measured in PAC. How many atoms are in this supercell ??? You must probably increase the supercell size and check convergence of the EFG.

Re: [Wien] Large difference in calculated and experimental EFG

2019-03-18 Thread Ramsewak Kashyap
Thanks for your valuable suggestion, Stefaan sir. On Mon 18 Mar, 2019, 5:45 PM Stefaan Cottenier, wrote: > If the goal is to have a EFG that is a predictive as possible for > experiment, then it is advised to take the experimental cell parameters > (but with position optimization). > > > > If

Re: [Wien] Large difference in calculated and experimental EFG

2019-03-18 Thread Stefaan Cottenier
If the goal is to have a EFG that is a predictive as possible for experiment, then it is advised to take the experimental cell parameters (but with position optimization). If that EFG does not agree with experiment, then this is a trigger to search further. There can be many reasons (assuming

Re: [Wien] Large difference in calculated and experimental EFG

2019-03-18 Thread Ramsewak Kashyap
atomic positions optimization means force relaxation.. I have did that. but I am asking about cell parameter optimization. Is it necessary for .cif file getting form COD?? Thanks On Mon, Mar 18, 2019 at 4:55 PM Stefaan Cottenier < stefaan.cotten...@ugent.be> wrote: > Yes, optimization of the

Re: [Wien] Large difference in calculated and experimental EFG

2019-03-18 Thread Stefaan Cottenier
Yes, optimization of the atomic positions is absolutely necessary to have a meaningful value for Vzz and eta in a supercell. Stefaan From: Wien On Behalf Of Ramsewak Kashyap Sent: Monday, March 18, 2019 12:23 PM To: A Mailing list for WIEN2k users Subject: [Wien] Large difference in

[Wien] Large difference in calculated and experimental EFG

2019-03-18 Thread Ramsewak Kashyap
Hi Wien2k users, I am doing EFG calculation for TiNi monoclinic phase, but I am getting large difference in Calculated and measured value, I have taken parameters from COD, then make 2x2x2 supercell and replace one Ti with Ta atom... is structural optimization is necessary?? and eta value was