<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">hi<br> dear evayz <br>i spoke to you earlier in the forum about the elastic properties with ibrav = 0 ( free lattice<br>i have some questions :<br><br>1- we do the calculation of elastic propreties only with ibrav= 0<br>2- i read about the input ibrav= 0 <br>we have to put only the celldm(1)<br>and the cell parameters<br>where i can get the cell parameter, i think have somthing with basic vectors<br><br>thank you in advance for your help<br><br><br><br><br><br><br><br><br><br>---------------------------------------------------<br>phd student<br>departement de physique<br>faculte de science <br>universite de sidi bel abbes<br><br></td></tr></table><br>