<div>Dear pwscf users:</div>
<div> I performed vc-relaxation of SnO2 which has ibrav=6 sysmmetry(a=b!=c,cosab=cosbc=cosac=0). After the relaxation,the symmtry changed(a=b!=c,cosab!=0,cosbc=cosac=0). </div>
<div>Is this the code bug?<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> </div>