Dear All QE users,<br><br>While doing scf calculations on alpha O2 crystal, i got a massage :<br><br>Found symmetry operation: I + ( 0.0000 -0.5000 -0.5000)<br> This is a supercell, fractional translation are disabled<br>
<br>Although code correctly predicts the space group, is there something wrong in <br>the input coordinates?<br><br>However, i checked the structure in Xcrysden, and found it to be correct (i.e. correct bond <br>lengths, angles, distances between atoms).<br>
<br>Can anybody help me out?<br><br>Below is the part of input file:<br><br>#################################################################<br>&system<br> ibrav = 12,<br> celldm(1)=9.5860, celldm(2)=1.06271, celldm(3)=0.67699, celldm(4)=-0.672625<br>
nat=4, ntyp=1, <br> nbnd=12, <br> ecutwfc=40, <br> ecutrho=300, <br> /<br><br>ATOMIC_SPECIES <br> O 8.0000 O.pbe-van_ak.UPF <br><br>ATOMIC_POSITIONS (crystal)<br>
O 0.171000 0.105000 0.000000 <br>O -0.171000 -0.105000 0.000000 <br>O 0.171000 0.605000 0.500000 <br>O -0.171000 0.395000 0.500000<br>#################################################################<br><br><br>With Kind Regards,<br clear="all">
Sonu Kumar<br><br>Phd Student<br>Physics Department<br>Indian Institute of Technology <br>Delhi-110016, India<br>web:-<a href="http://www.iitd.ac.in/">http://www.iitd.ac.in/</a><br>