i have a question about the optimisation<div><br></div><div>1. for optimising the internal coordinates and lattice parameter i have used 4*4*4 kpoint grid it converged in 10 steps</div><div> and i get the lattice parameters and internal parameters at equilibrium but when i incresed the kpoint mesh to 8*8*8</div>
<div> then the forces on atoms are large so my equilibrium parametes changes so how can i start whether i should use </div><div> higher kpoint mesh from start of my calculation?</div><div><br></div><div><br></div>
<div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div>sahu b</div><div>mumbai</div>