[Wien] update-packages
Osama Yassin
oyassin63 at gmail.com
Tue Feb 11 19:21:49 CET 2014
Dear J Morteza and Wien2k user
I have installed IR elastic (Cubic) for calculating the elastic constant of
the Half Heusler alloy CoTiSb (can be written TiCoSb). The space group
should be No 216 (F -43m) as Wien2k produces by sgroup. This is consistent
with its structure. However, For calculating the elastic constant I noted
that IR elast produces the space group No. 22 (F222) as shown below:
---------------------------------------------------------------------------------------------------------------
Start for AUTO intialization Styp1__4.0
##########################################
3 Atoms found: Co Ti Sb
generate atomic configuration for atom 1 : Co
generate atomic configuration for atom 2 : Ti
generate atomic configuration for atom 3 : Sb
next is setrmt
specify nn-bondlength factor: (usually=2) [and optionally dlimit, dstmax
(about
1.d-5, 20)]
DSTMAX: 20.0000000000000
iix,iiy,iiz 4 4 4 42.6902880000000
44.5403160000000 46.2478120000000
NAMED ATOM: Co1 Z changed to IATNR+999 to determine equivalency
NAMED ATOM: Ti1 Z changed to IATNR+999 to determine equivalency
NAMED ATOM: Sb1 Z changed to IATNR+999 to determine equivalency
ATOM 1 Co1 ATOM 3 Sb1
RMT( 1)=2.32000 AND RMT( 3)=2.32000
SUMS TO 4.64000 LT. NN-DIST= 4.81905
ATOM 2 Ti1 ATOM 1 Co1
RMT( 2)=2.26000 AND RMT( 1)=2.32000
SUMS TO 4.58000 LT. NN-DIST= 4.81905
ATOM 3 Sb1 ATOM 1 Co1
RMT( 3)=2.32000 AND RMT( 1)=2.32000
SUMS TO 4.64000 LT. NN-DIST= 4.81905
NN ENDS
0.000u 0.002s 0:00.01 0.0% 0+0k 24+48io 0pf+0w
> sgroup (20:47:13) 0.000u 0.000s 0:00.00 0.0% 0+0k 0+8io 0pf+0w
Names of point group: 222 222 D2
Names of point group: 222 222 D2
Names of point group: 222 222 D2
Number and name of space group: 22 (F 2 2 2)
> symmetry (20:47:13) 0.000u 0.001s 0:00.01 0.0% 0+0k 16+32io 0pf+0w
I checked the the atomic positions and found nothing wrong.
Can you please tell us why the space group is F222 rather than F -43m.
Best regards
O A Yassin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://zeus.theochem.tuwien.ac.at/pipermail/wien/attachments/20140211/c4687bc9/attachment.htm>
More information about the Wien
mailing list