<html dir=""><head><style id="axi-htmleditor-style" type="text/css">p { margin: 0px; }</style></head><body style="font-size: 10pt; font-family: Arial; background-image: none; background-repeat: repeat; background-attachment: fixed;">thank you dear delamora.<br>I did not grow the cell.actually supercell program just break the positions and i just replace some atoms by another element and i think the volume of cell not change considerably.Now can i reduce k-points, because as you said reciprocal lattice is connected to real space but i did not spread the cell.<br><br></body></html>