<div dir="ltr"><span style="font-family:arial,sans-serif;font-size:13px">Dear WIEN2k community,</span><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">
I am trying to use PHONOPY to calculate phonon dispersion curves for InP in the zincblend phase as a test. I used an optimized structural parameter to build a 3x3x3 supercell using the "supercell" utility program. After that, PHONOPY built two other supercells displacing atoms 1 and 109 by 0.02 Bohr along x direction.</div>
<div style="font-family:arial,sans-serif;font-size:13px"> Now, it is important to say that PHONOPY works with P1 symmetry, what means I can use the new cell suggested by "nn", but not the one suggested by "sgroup" during initialization.</div>
<div style="font-family:arial,sans-serif;font-size:13px"> Everything went smoothly when I initialized the calculation for the first supercell (that one with displacement for atom 1) accepting twice the cell generated by "nn", but I got the following error message for the second cell (that one with displacement for atom 109).</div>
<div style="font-family:arial,sans-serif;font-size:13px"> Finally, I would like to mention that if I accept the cell suggested by "sgroup", everything goes fine for the second cell, but this is not suitable for PHONOPY as mentioned above.</div>
<div style="font-family:arial,sans-serif;font-size:13px"> I would appreciate any help with this issue.</div><div style="font-family:arial,sans-serif;font-size:13px"> The case.struct is too big for the mailing list (64 KB), but I can send it to the personal e-mail of anyone interested in.</div>
<div style="font-family:arial,sans-serif;font-size:13px"> The error message is at the end of this message. </div><div style="font-family:arial,sans-serif;font-size:13px"> All the best,</div><div style="font-family:arial,sans-serif;font-size:13px">
Luis</div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">--------------------------------------------------------------------------------------------------------------------</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px"><div>---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 31 )*(number of pointgroup-operations)</div>
<div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 2 ISYM: 1 NSYM 4</div><div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div>
<div> ---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 32 )*(number of pointgroup-operations)</div><div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 2 ISYM: 1 NSYM 4</div>
<div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div><div> ---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 33 )*(number of pointgroup-operations)</div>
<div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 2 ISYM: 1 NSYM 4</div><div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div>
<div> ---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 37 )*(number of pointgroup-operations)</div><div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 1 ISYM: 2 NSYM 4</div>
<div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div><div> ---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 38 )*(number of pointgroup-operations)</div>
<div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 1 ISYM: 2 NSYM 4</div><div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div>
<div> ---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 39 )*(number of pointgroup-operations)</div><div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 1 ISYM: 2 NSYM 4</div>
<div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div><div> ---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 52 )*(number of pointgroup-operations)</div>
<div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 2 ISYM: 1 NSYM 4</div><div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div>
<div> ---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 53 )*(number of pointgroup-operations)</div><div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 2 ISYM: 1 NSYM 4</div>
<div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div><div> ---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 54 )*(number of pointgroup-operations)</div>
<div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 2 ISYM: 1 NSYM 4</div><div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div>
<div> ---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 63 )*(number of pointgroup-operations)</div><div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 1 ISYM: 2 NSYM 4</div>
<div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div><div> ---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 64 )*(number of pointgroup-operations)</div>
<div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 1 ISYM: 2 NSYM 4</div><div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div>
<div> ---------- ERROR ------------------</div><div> ERROR: (multiplicity of atom 65 )*(number of pointgroup-operations)</div><div> ERROR: is NOT = (number of spacegroup-operations)</div><div> ERROR: MULT: 1 ISYM: 2 NSYM 4</div>
<div> ERROR: Check your struct file with x sgroup </div><div> ---------- ERROR ------------------</div></div></div>