Optimizing Nickel Cluster

[Natalie Austin]

Hello,

I'm fairly new to cp2k. I've been attempting to study a Nickel (and copper) 
cluster on a ZnO support.
So far using I've been able to converge the Copper cluster (~3 hrs) and the 
Cu on the ZnO support (~20hrs) using the input files below. However, I'm 
having an issue with the Nickel cluster. 
Initially I used the same input as with the copper cluster except I changed 
the basis, pseudopotentials.
I've also I tried increasing the i) cutoff ,  ii) adding spin polarization 
with UKS  and iii) UKS and changing the multiplicity.
However, the calculation runs for over 24 hours in each case and only 
performs 0-2 optimization steps. I just want to know if this is normal for 
a nickel system? and if there is anything else I could try to obtain 
convergence. 

Thanks,

Natalie


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