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<DIV>Dear users:</DIV>
<DIV> I execute optimization for lattice parameters for tetragonal. Firstly, I choose the first choice [1] VARY VOLUME with CONSTANT RATIO A:B:C; and then which option should I choose: [2] VARY C/A RATIO with CONSTANT VOLUME or [5] VARY A and C (2D-case) (tetragonal or hexagonal lattice), which is suitable? <BR><BR><BR></DIV>
<DIV>--<BR>
<DIV><FONT style="BACKGROUND-COLOR: #ffffff"><FONT color="#000000" size="2" face="Verdana">Ph.D. Candidate </FONT></FONT></DIV>
<DIV><FONT style="BACKGROUND-COLOR: #ffffff"><FONT color="#000000" size="2" face="Verdana">Yaojun Shi</FONT></FONT></DIV>
<DIV><FONT style="BACKGROUND-COLOR: #ffffff"><FONT color="#000000" size="2" face="Verdana">College of Materials Science and Engineering</FONT></FONT></DIV>
<DIV><FONT style="BACKGROUND-COLOR: #ffffff"><FONT face="Verdana"><FONT color="#000000" size="2">Nanjing University of Science and Technology<BR>Nanjing 210094, P. R. China<BR>Tel/Fax: (+86 +25) 84315159<BR>Email: </FONT><A href="mailto:shiyaojun@163.com"><FONT color="#0000f0" size="2">shiyaojun@163.com</FONT></A></FONT></FONT></DIV>
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