<html><head><meta content="text/html; charset=windows-1252" http-equiv="Content-Type"></head><body><div><div style="font-family: Calibri,sans-serif; font-size: 11pt;">Dear all, <br>i'm working on a Yttria doped Zirconia, YSZ. I have understood how to calculate the U values for a single site, but how can i calculate the U values for both the transition metal inside the same structure, e.g. Zr and Y in YSZ structure? Do i have to build a supercell even in this case? Do you think that i need to calculate also the oxygen U contribute?<br>Sorry for the trivial question, but I'm deeply interested in the method and understand every feature.<br>Thanks in advance,<br>Tommaso Francese.<br>Universitą Cą Foscari of Venice.<br></div></div></body></html>