Order of atoms in Fist input file changes result?
Johannes Wagner
joh... at gmail.com
Thu Mar 5 17:51:13 UTC 2015
Dear all,
maybe I am missing something but I recently had to realise that when I
change the order of coordinates of my inpuf file in a FIST run, but leave
anything else the same, I get another result (quite substantially from time
to time)
e.g. in the al2o3.inp from /cp2k/tests/Fist/al2o3.inp
If I run this file for one step I get
# Step Nr. Time[fs] Kin.[a.u.]
Temp[K] Pot.[a.u.] Cons Qty[a.u.] UsedTime[s]
0 0.000000 1.768042507 298.000000000
-281.499021201 -279.730978694 0.000000000
1 3.000000 1.760113969 296.663661049
-281.491144428 -279.731030458 0.80785918
If I run it again, putting all the Oxygens and their coordinates first, I
get
# Step Nr. Time[fs] Kin.[a.u.]
Temp[K] Pot.[a.u.] Cons Qty[a.u.] UsedTime[s]
0 0.000000 1.768042507 298.000000000
-281.499021201 -279.730978694 0.000000000
1 3.000000 1.777233556 299.549132838
-281.508050366 -279.730816810 0.802598953
Is this expected behaviour? Have I missed something? I am using the latest
svn checkout. I figured since everything is index with the Atomic Kind, it
shouldn't matter where in the coordinate list an atom appears, maybe this
was wrong.
If this is normal, what is the "correct" way of ordering the atomic
coordinates?
thank you all for any hints
all the best,
Johannes
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