Issue with symmetry
S Ling
lingsa... at gmail.com
Tue Feb 17 14:02:59 UTC 2015
You need to rotate your lattice so that your beta=86.4, not gamma=86.4.
This is the requirement of MONOCLINIC space symmetry in CP2K,
see http://manual.cp2k.org/trunk/CP2K_INPUT/FORCE_EVAL/SUBSYS/CELL.html#desc_SYMMETRY
SL
On Tuesday, February 17, 2015 at 1:15:44 PM UTC, Laszlo Ryan Seress wrote:
>
> Dear All,
>
> I have been having an issue with the symmetry command in the CELL section.
> My input has:
>
> &CELL
> A 16.00000000 0.000000000 0.000000000
> B 0.000000000 15.60000000 0.000000000
> C 0.000000000 0.000000000 15.60000000
> ALPHA_BETA_GAMMA 90.00000000 90.00000000 86.40000000
> SYMMETRY MONOCLINIC
> &END CELL
>
> but the output has:
>
> CELL_TOP| Volume [angstrom^3]:
> 3893.760
> CELL_TOP| Vector a [angstrom 16.000 0.000 0.000 |a| =
> 16.000
> CELL_TOP| Vector b [angstrom 0.000 15.600 0.000 |b| =
> 15.600
> CELL_TOP| Vector c [angstrom 0.000 0.000 15.600 |c| =
> 15.600
> CELL_TOP| Angle (b,c), alpha [degree]:
> 90.000
> CELL_TOP| Angle (a,c), beta [degree]:
> 90.000
> CELL_TOP| Angle (a,b), gamma [degree]:
> 90.000
> CELL_TOP| Requested initial symmetry:
> MONOCLINIC
> CELL_TOP| Numerically orthorhombic:
> YES
>
> Has anyone had a similar issue with getting the angles changed and the
> program changing the symmetry from monoclinic to orthorhombic?
>
> Thanks for any help you may be able to provide.
>
> Best regards,
> Laszlo
>
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