<span class="Apple-style-span" style="border-collapse:collapse;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"><div><div>I cannot answer about Materials Studio (few people can afford it). I think it is not just a matter of lattice parameters. </div>
<div>The unit cell may be orthorhombic, but the basis may not be invariant for the symmetry operations of orthorhombic space groups. </div><div><br></div><div><br></div><div><br></div><div>l giorno 06/mar/2013, alle ore 09.50, Krishna chaitanya ha scritto:</div>
<blockquote type="cite"><div dir="ltr">Dear users....<div><br></div><div>I am trying to get optimized geometry of (201) plane of Bi2O3 with three layers. When I cleaved the tetragonal geometry of Bi2O3 crystal through (201) plane, Material Studio software is showing it as triclinic geometry with lattice constants a=13.8295, b=15.4760, c=34.1069 (of which 20angstroms is vacuum), alpha=beta=gamma=90 degrees. But according to crystallographic systems, these constants should belong to orthorhombic rather than triclinic.</div>
</div></blockquote><div><br></div><div>A triclinic cell with all angles equal to 90° will result in an orthorhombic cell.</div><div>You can describe it with ibrav=8, celldm(1)=a, celldm(2)=b/a, celldm(3)=c/a.</div><div><br>
</div><blockquote type="cite"><div dir="ltr"><div>Then how Material studio is showing it as triclinic?</div></div></blockquote></div><br></span><div><br></div>-- <br>
<div>Eduardo Menendez Proupin</div><div>Departamento de Fisica, Facultad de Ciencias, Universidad de Chile <br>URL: <a href="http://fisica.ciencias.uchile.cl/%7Eemenendez" target="_blank">http://fisica.ciencias.uchile.cl/~emenendez</a><div>
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