Dear Manuel,
Torbjörn is saying exactly the same thing I said, re fractional
translations etc...
In my opiinion, f you want to get exactly zero forces on the atoms that
should have zero forces, monitor them as a function of k-point sampling.
Ss you increase the k-points, the ground state
hi mkondrinthe email below, from the author of cif2cell, explains the reasons for havingzero forces for all copper and chromium atoms on the basis of the CIF file sitesymmetries; please find enclosed the cif fileregardsManuelPS the expected forces, qualitatively speaking are shown below (first 6
