<DIV> </DIV>
<DIV> Dear all</DIV>
<DIV> When I plot the 2D charge density of ZnO (1 0 0) with pp.x,but I don't know how to set the parameter of the vectors :</DIV>
<DIV>e1(1) =?, e1(2)=? e1(3) = ?,<BR>e2(1) =?, e2(2)=?, e2(3) = ?,</DIV>
<DIV> Could somebody who know it tell me the answer?</DIV>
<DIV> Your advice will be appreciated .<BR></DIV>
<DIV> qianjin wang e-mail: <A href="mailto:wangqj1@126.com">wangqj1@126.com</A><BR> Xiangtan university <BR>Xiangtan, Hunan Province, China.<BR><BR><!--endarticle--></DIV>