hi roberto, I think that you may replace Et(1) by E(64)/64. perhaps the other users can correct me, if I am making a mistake...
best regards, pablo ----- Original Message ----- From: Roberto Veiga To: SIESTA-L@listserv.uam.es Sent: Friday, August 01, 2008 10:08 AM Subject: [SIESTA-L] Vacancy formation energy Hi, everybody: I would like to calculate the formation energy for a single vacancy in bcc-iron (64-atoms supercell). The more obvious way (at least it is what I think) is to use the following equation: Ef=Et(64)-Et(63)-Et(1), where Et(1) is the total energy of the 1-atom unit cell. Is it OK? Is it completely wrong? Roberto Veiga PhD student INSA-Lyon __________ NOD32 3303 (20080728) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com