<div dir="ltr"><div><div><div><div><div><div><div>Thank you Dr pieper and Mr gavin for your replies<br><br></div>What i am doing is just a test of the antiferromagnetic calculation because i am a beginner. For that i want to know if the calculation lead to these results.<br><br></div>I tested the two structures and i found the same results.<br><br></div>Structure 1: 166 R-3m<br><br></div>a=5.572783 b=5.72783 c=27.300952<br></div>alpha= 90 beta=90 gama=90<br></div>Ni1 (0,0,0) Ni2 (0.5,0.5,0.5) O (0.25,0.25,0.25)<br><br></div>Structure 2: R<br><br>a=5.572783 b=5.72783 c=27.300952<br>
alpha= 90 beta=90 gama=120<br>
Ni1 (0,0,0) Ni2 (0.5,0.5,0.5) O (0.25,0.25,0.25)<br>
<br><div><div><div><div><div><div><div><div><div>The question is: are the two structures equivalent?<br></div><div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div style="font-family:monospace"><div><font><span style="color:rgb(0,0,255)">Mr: A.Reggad</span> <br><br><span style="background-color:rgb(238,238,238)"><span style="color:blue">Laboratoire de Génie Physique</span></span><br></font></div><font><span style="color:rgb(0,0,255)">Université Ibn Khaldoun - Tiaret</span><br></font></div><div><font><span style="font-family:monospace"><span style="color:rgb(0,0,255)">Algerie</span></span></font><br></div><div><div><br><span style="font-family:times new roman,serif"><span style="color:blue"></span></span><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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