<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 QE user,<br>I'd like to calculate the XRD spectra of a zirconia supercell... I've read about the Xspectra package. <br>Do you know if it runs also with ultrasoft pseudopotential like, e.g. Zr.pbe-nsp-van.UPF? And otherwise, how do I buil the gipaw pseudopotential suitable for that? <br>Thanks in advance, <br>Tommaso Francese,<br>Universitą Cą Foscari of Venice<br></div></div></body></html>