<html><head></head><body><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir="ltr" data-setdir="false">Dear all,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I need to calculate the adsorption energy of Cl- ion on the ferrite (bcc) phase on the (100) plane. My supercell of ferrite (2x2x2) consists of 16 Fe atoms.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">My question is:</div><div dir="ltr" data-setdir="false">1. How to attach this Cl- ion on the surface?</div><div dir="ltr" data-setdir="false">2. Should the lattice parameter of ferrite be changed to accommodate Cl- ion on the surface?</div><div dir="ltr" data-setdir="false">3. OR the lattice parameter should be as that of ferrite?</div><div dir="ltr" data-setdir="false">4. Should such a kind of calculation be "relax" OR "vc-relax"?</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Please help me in this regard.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Thanking you,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Best regards</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Akhil Nair</div><div dir="ltr" data-setdir="false">Research scholar,</div><div dir="ltr" data-setdir="false">HBNI, India</div></div></body></html>