Dear pwscf users:<br> I checked VCSexample in V4.0, and found a disagreement in the *.in and *.out. For example:<br>In the <a href="http://As.vcs00.in">As.vcs00.in</a> file,the system is defined as follows:<br>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<br>
+ ibrav = 0 ,<br>+ A = 3.70971016 ,<br>+ B = 3.70971016 ,<br>+ C = 3.70971016 ,<br>+ cosAB = 0.49517470 ,<br>+ cosAC = 0.49517470 ,<br>+ cosBC = 0.49517470 ,<br>+ <br>+ CELL_PARAMETERS cubic <br>+ 0.58012956 0.00000000 0.81452422<br>
+ -0.29006459 0.50240689 0.81452422<br>+ -0.29006459 -0.50240689 0.81452422<br>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ <br>In the beginning of As.vcs00.out file,the system is changed.<br>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<br>+ bravais-lattice index = 0<br>+ lattice parameter (a_0) = 7.0103 a.u.<br>+ unit-cell volume = 245.3705 (a.u.)^3<br>
+ <br>+ celldm(1)= 7.010336 celldm(2)= 1.000000 celldm(3)= 1.000000<br>+ celldm(4)= 0.495175 celldm(5)= 0.000000 celldm(6)= 0.000000<br>+<br>+ crystal axes: (cart. coord. in units of a_0)<br>
+ a(1) = ( 0.580130 0.000000 0.814524 ) <br>+ a(2) = ( -0.290065 0.502407 0.814524 ) <br>+ a(3) = ( -0.290065 -0.502407 0.814524 )<br>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ <br>
a=3.70971016A -> celldm(1)=7.010336a.u. and celldm(2)=celldm(3)=1<br>celldm(4)=cos(bc)=0.495175<br>but why celldm(5),celldm(6)are equal to 0?<br clear="all"><br>-- <br>Y. C. Cheng<br>Department of Phyics<br>Nanjing University<br>
Nanjing 210093<br>P. R. China<br>Tel: 86-25-83592907<br>Email: <a href="mailto:yccheng.nju@gmail.com">yccheng.nju@gmail.com</a>