Dear All,<br><br>I am working on layered type material which crystallizes in rhombohedral structure with space group 166 ( ibrav =5). In the i/p file for VC-Relax, i used the lattice parameters and angle as celldm(1)=7.4870 and celldm(4)=0.586005.<br>
<br>In the first step of the of the o/p file shows the basis vectors as <br>0.454970 -0.262677 0.850884<br>0.000000 0.525354 0.850884<br>-0.4504970 -0.262677 0.850884<br><br>After completing the VC-Relax i got the basis vectors as<br>
<br><br>CELL-PARAMETERS ( alat=7.4870)<br>0.441119855 -0.254680667 0.78874941<br>0.00000000 0.509361335 0.78874941<br>-0.441119855 -0.254680667 0.78874941<br><br> with this o/p values, how can i calculate lattice vector and angle for my material ( For orthorhombic and tetragonal structures i calculated lattice parametrs successfully but i am not able to do this structure ).<br>
<br><br>i am requesting your favorable reply.<br><br>with regards<br>S.Appalakondaiah<br>PhD Scholar<br>University of Hyderabad<br>Hyderabad<br>India<br><br><br><br><br>