Re: [Wien] Help me to solve #194 SG perovskites structure in AFM phase calculation problem

2018-08-23 Thread Gavin Abo
See comments below. here is correct inst configuration from attached struct file: This configuration is uddu and not udud. Right? The answer to the above question depends on how you define udud.  It is udud if you define it as follows. For the "instgen_lapw -ask" input and case.inst below, y

Re: [Wien] Help me to solve #194 SG perovskites structure in AFM phase calculation problem

2018-08-23 Thread Gavin Abo
With instgen_lapw, you specify just ud or dn in that case as you have two nonequivalent positions.  Thus, only the one u and one d that you see in case.inst.  However, you have a multiplicity of 2 for each of the two nonequivalent positions.  So one of the nonequivalent Fe positions corresponds

Re: [Wien] Help me to solve #194 SG perovskites structure in AFM phase calculation problem

2018-08-23 Thread Enamul Haque
Dear Sir,We get SG  8 Cm if we run sgroup with "x sgroup -settol .0100". Anyway, now we are convinced with SG P63mc which belongs to the hexagonal family. >From the new structure file (two Fe sites with multi. 2) we got below >case.inst file but I am not able to get the point "how I can decid

Re: [Wien] Help me to solve #194 SG perovskites structure in AFM phase calculation problem

2018-08-23 Thread Peter Blaha
From the files you sent, I never get Cm space group. Anyway, if it is antiferromagnetic, it has only TWO Fe sites, one with spin-up and one with dn. So I used your struct file, but the 4 Fe atoms should probably not be splitted into 1-4, but into two positions, each with multiplicity 2, such

[Wien] Help me to solve #194 SG perovskites structure in AFM phase calculation problem

2018-08-20 Thread Enamul Haque
Dear Wien2k Users and Experts, We already got sufficient help from Dr. Gavin in this case but we are not convinced from the space group point of view. With the original CIF file (attached), we want to check the ground state energy of the AFM case of "Cs3Fe2Cl9" (conventional standard and symmetr