Re: [Wien] Transition-State/NEB Calculations

2018-06-15 Thread E.A.Moore
It may be worth looking at the CRYSTAL17 tutorial on this. http://tutorials.crystalsolutions.eu/tutorial.html?td=ts&tf=tutorial-ts_crystal#energytol CRYSTAL does not use NEB but does suggest you use a high SCF tolerance 10-11H. It may also be worth looking at their method. The only place I have

Re: [Wien] Metal or semimetal

2019-01-30 Thread E.A.Moore
The Wikipedia article on metalloids says it's the overlaping valence and conduction bands that define semimetals in physics. Following textbooks in chemistry could lead to confusion as many chemists still use the term for elements that cannot be classified definitively as metals or non-metals

Re: [Wien] Discrepancy in the simulation of the paramagnetic state

2016-11-27 Thread E.A.Moore
In the paramagnetic state, as Prof. Blaha says, the atoms still have magnetic moments but they are randomly oriented. This arises when the thermal energy is sufficient to overcome the spin-spin coupling. I would expect a calculation on Gd at 0K to give you a ferromagnetic state with very small s

Re: [Wien] Discrepancy in the simulation of the paramagnetic state

2016-11-28 Thread E.A.Moore
There is some confusion here about types of paramagnetism. If the spin-polarised and non-spin polarised results are the same, it merely means that the spin up and spin down bands are at equal energies. Pt has no unpaired spins so no magnetic moment. It could from the calculation be diamagneti

Re: [Wien] About the magnetic moment of vanadium in vanadium sulphide

2017-09-07 Thread E.A.Moore
I have been following this thread and I think there is some confusion. 1. On the thread it said that the experiment showed it was Pauli paramagnetic. This is the type of magnetism displayed by some metals e.g. sodium which is only apparent if you apply a magnetic field. 2. If you include spin i

Re: [Wien] About the magnetic moment of vanadium in vanadium sulphide

2017-09-07 Thread E.A.Moore
Solids 01187 Dresden Von: Wien [wien-boun...@zeus.theochem.tuwien.ac.at] im Auftrag von E.A.Moore [e.a.mo...@open.ac.uk] Gesendet: Donnerstag, 7. September 2017 11:02 An: A Mailing list for WIEN2k users Betreff: Re: [Wien] About the magnetic moment of vanadium in

Re: [Wien] About the magnetic moment of vanadium in vanadium sulphide

2017-09-07 Thread E.A.Moore
Your calculations are probably fine. Apologies for my previous posting but my point was partly that I think you said the experimentalists claimed it was Pauli paramagnetic. Pauli paramagnetism is not the type of paramagnetism that arises from unpaired electrons on metal ions in, for example, t

Re: [Wien] Unit of magnétic suscptibility

2017-09-22 Thread E.A.Moore
cm3/mol is the unit of the molar susceptibility in the cgs system. Did you want to convert it to the mass susceptibility in cm3/g? If so you need to divide by the relative molecular mass. Should you not use SI rather than cgs units? Elaine A. Moore From: Wien [mailto:wien-boun...@zeus.theoche

[Wien] Interstitial N-N pair in GaP supercell

2010-07-04 Thread E.A.Moore
If you want to study a pair of interstitial N atoms, you must add two N atoms, not replace P. Or if you are replacing P by two interstitial N atoms, you remove one P and add two N at new positions. Interstitial means the atoms are not on lattice sites. If the reduced cell has 16 inequivalent at

[Wien] Interstitial N-N pair in GaP supercell

2010-07-08 Thread E.A.Moore
-Original Message- From: Kakhaber Jandieri [mailto:kakhaber.jandi...@physik.uni-marburg.de] Sent: 06 July 2010 15:28 To: A Mailing list for WIEN2k users Subject: Re: [Wien] Interstitial N-N pair in GaP supercell >My final goal is to study the influence of these interstitial structures

[Wien] Interstitial N-N pair in GaP supercell

2010-07-09 Thread E.A.Moore
I don't know why it starts again, but I guess there will be a minimum with the two atoms at the N2 distance as the N2 bond is very strong. You could start by putting your N atoms farther apart. Elaine -Original Message- From: Kakhaber Jandieri [mailto:kakhaber.jandi...@physik.uni-marbur

[Wien] calculations of monoclinic and triclinic systems

2010-07-13 Thread E.A.Moore
There is no reason you should not do a calculation for monoclinic and triclinic systems. Look at the error message you have. Then check the User Guide and previous questions. Only after trying suggestions from there write to the mailing list with details of your files and error message. Elaine

[Wien] enthalpy of formation

2010-07-13 Thread E.A.Moore
Try P21/c or space group 11, but be carefuk as it maybe a non-standard setting. Elaine A. Moore Open University From: Sherif Yehia [mailto:wien542...@yahoo.com] Sent: 09 July 2010 14:18 To: A Mailing list for WIEN2k users Subject: Re: [Wien] enthalpy of formation

[Wien] IR spectrum and NMR

2010-10-30 Thread E.A.Moore
For NMR you need CASTEP at the moment but I believe there are plans to add this capability to WIEN2k in the future. Elaine A. Moore Chemistry Department, The Open University From: Ahmad Ranjbar [ranj...@imr.edu] Sent: 30 October 2010 11:55 To: A Mailing list for W

[Wien] Mg in GaN

2010-03-15 Thread E.A.Moore
You may want to study Mg-doped GaN as this would be a p-type semiconductor but you certainly would not want to study antiferromagnetic coupling between Mg2+ ions as Prof. Blaha has pointed out. However if you were interested in Mg-doped GaN you would probably want a low level of dopant and hence