Home › Forums › density functional theory › the Born-Oppenheimer approximation › BO approximation This topic has 0 replies, 1 voice, and was last updated 2 years, 2 months ago by thsr. Viewing 1 post (of 1 total) Author Posts October 7, 2022 at 10:18 am #6976 thsrParticipant B-O approximation is not valid when temperature is very high (nuclei movement is higher). Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In