<div dir="ltr"><br><div class="gmail_quote"><br><div dir="ltr"><div><div><div><div><div>Dear all,<br><br></div>I am trying to calculate phonon frequencies for a ternary compound with pnma space group.<br><br></div>This is the dyn0 file:<br>
<br> 4 6 2<br> 24<br> 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00<br>
0.286346548372504E-07 0.000000000000000E+00 -0.264947969115102E+00<br> 0.000000000000000E+00 0.285279951552526E+00 0.000000000000000E+00<br> 0.286346548372504E-07 0.285279951552526E+00 -0.264947969115102E+00<br>
0.000000000000000E+00 0.570559903105052E+00 0.000000000000000E+00<br> 0.286346548372504E-07 0.570559903105052E+00 -0.264947969115102E+00<br> 0.000000000000000E+00 -0.855839854657579E+00 0.000000000000000E+00<br>
0.286346548372504E-07 -0.855839854657579E+00 -0.264947969115102E+00<br> 0.278547735404513E+00 0.000000000000000E+00 0.222877983527052E-07<br> 0.278547764039168E+00 0.000000000000000E+00 -0.264947946827304E+00<br>
0.278547735404513E+00 0.285279951552526E+00 0.222877983527052E-07<br> 0.278547764039168E+00 0.285279951552526E+00 -0.264947946827304E+00<br> 0.278547735404513E+00 0.570559903105052E+00 0.222877983527052E-07<br>
0.278547764039168E+00 0.570559903105052E+00 -0.264947946827304E+00<br> 0.278547735404513E+00 -0.855839854657579E+00 0.222877983527052E-07<br> 0.278547764039168E+00 -0.855839854657579E+00 -0.264947946827304E+00<br>
-0.557095470809026E+00 0.000000000000000E+00 -0.445755967054105E-07<br> -0.557095442174371E+00 0.000000000000000E+00 -0.264948013690699E+00<br> -0.557095470809026E+00 0.285279951552526E+00 -0.445755967054105E-07<br>
-0.557095442174371E+00 0.285279951552526E+00 -0.264948013690699E+00<br> -0.557095470809026E+00 0.570559903105052E+00 -0.445755967054105E-07<br> -0.557095442174371E+00 0.570559903105052E+00 -0.264948013690699E+00<br>
-0.557095470809026E+00 -0.855839854657579E+00 -0.445755967054105E-07<br> -0.557095442174371E+00 -0.855839854657579E+00 -0.264948013690699E+00<br><br></div>more details:<br>conv_thr=1.D-12<br>ecutwfc=60<br>degauss=0.001<br>
smearing= 'mp'<br>Total force=0.000033<br><br></div><div>Eg is about 1.2 eV<br></div><div><br></div>The <a href="http://ph.in" target="_blank">ph.in</a> input:<br><br>&inputph<br> recover=.false. ,<br> tr2_ph=1.0d-12,<br>
ldisp=.true. ,<br>
</div> nq(1)=4, nq(2)=6, nq(3)=2,<br><div> amass(1)=***,<br> amass(2)=***,<br> amass(3)=***,<br> outdir='../tmp',<br> prefix='***-pnma',<br> fildyn='***.dyn',<br><br></div><div>I have problem with convergence. The job will be stopped after 100 iterations in dyn9.<br>
<br><br></div><div>Thanks for your help,<br></div><div>Rohollah<br></div></div>
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