<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Dear Ding and Eyvaz:<BR> Thanks for your advice! The calculation of free N atom with spin is OK with your help! And I test the calculation with and without some key-words "nosym and occupation":<BR> 1. without "nosym=.true. and occupation='tetrahedra'" the energy is -19.49051771 ryd<BR> 2. with "nosym=.true." the energy is -19.49051771 ryd<BR> 3. with "occupation='tetrahedra'" the energy is -19.49051770 ryd<BR> 4. with "nosym=.true. and occupation='tetrahedra'" the energy is -19.49051771 ryd<BR>so
there is no difference among the energy results with or without those keywords! Maybe these key-words are optional in the atom calculation case. <BR> Thanks!<BR> Best wishes!</BLOCKQUOTE><p>
<hr size=1><a href="http://cn.mail.yahoo.com" target=blank>ÇÀ×¢ÑÅ»¢Ãâ·ÑÓÊÏä-3.5GÈÝÁ¿£¬20M¸½¼þ£¡</a>