Dear all,<br><br>I'm trying to calculate the phonon density of states as a function of energy of a mono-clinic crystal. I use ibrav = 0 and define lattice vectors using 'CELL_PARAMETERS {bohr]'.<br><br>This allows me to do a self-consistent calculation (pw.x) and phonon dispersion calculations (ph.x) but I run into trouble when I try to use q2r.x. This is the error message that I get:<br>
<br><i>Error in routine read_file (1):<br> wrong celldm</i><br><br>In the pwscf input file I don't define celldm, because I use ibrav = 0, but q2r seems to have a problem with that.<br><br>Is there any way to fix this? Would it work if I start from scratch (not a very appealing option) and use ibrav = 12?<br>
<br>thanks in advance,<br><br>Matthias Mentink<br>PhD candidate<br>Superconducting magnet group, <br>Lawrence Berkeley National Laboratory, <br>Berkeley, CA<br>