<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Dear Wien2k Users</DIV>
<DIV> </DIV>
<DIV>My question is <STRONG>how to calculate total energy</STRONG> of solid? because i want to calculate the total energy difference between antiferromagnetic and ferromagnetic state. </DIV>
<DIV>This total energy is it obtained from optimization of structure (total energy as a function of te cell volume)?</DIV>
<DIV> If this is the case, how can i choose a serial of volumes? are there arbitrary?</DIV>
<DIV>Can you please help me to solve this problem ?</DIV>
<DIV> </DIV>
<DIV>Thanks a lot.</DIV>
<DIV> </DIV>
<DIV>H.Ben Abdallah</DIV>
<DIV>PHD. Departement of physicis, Faculty of Science.</DIV>
<DIV>Tunis. TUNISIA</DIV></td></tr></table>