<html><head></head><body><div class="ydpe426b620yahoo-style-wrap" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;"><div style="font-size: 13px; font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"></div>
<div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><font size="3" style=""><b style="">thanks you sir </b></font></div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><font size="3"><b><br></b></font></div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><b><font size="3"><span><span style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"> the definition for the compound </span></span><span style="color: rgb(51, 51, 51); font-family: Arial, sans-serif;">a=b = 3.74 A </span>alpha = beta = 90 gamma = 120 </font></b></div><div dir="ltr" data-setdir="false" style=""><b><font size="3">for AFM type I : i creat superstructure x super cell target lattice H : x =1, y = 1 , Z =2 then x sgroup, program define automatecly the space group the same of my original space group 156 without warrning </font></b></div><div dir="ltr" data-setdir="false" style=""><b><font size="3"><br></font></b></div><div dir="ltr" data-setdir="false" style=""><b><font size="3">but when try to do it for type II : x super cell P <span><span style="color: rgb(0, 0, 0); font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">: x =1, y = 1 , Z =1 x sgroup could not define the space group </span></span></font></b></div><div dir="ltr" data-setdir="false" style=""><span><span style="color: rgb(0, 0, 0); font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><b><font size="3"><br></font></b></span></span></div><div dir="ltr" data-setdir="false" style=""><span style="color: rgb(0, 0, 0); font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><b style=""><font size="3">i dont know why ??? </font></b></span></div><div dir="ltr" data-setdir="false" style="font-size: 13px;"><br></div>
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Le dimanche 26 janvier 2020 à 07:33:30 UTC+1, Gavin Abo <gsabo@crimson.ua.edu> a écrit :
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<p>Space group <font color="#ff0000">156</font> is part of the
hexagonal crystal family [1].</p>
<p>It seems that AFM type I, II, and/or III typically are only
defined for body centered cubic (bcc) and face centered cubic
(fcc) lattices. That is based on books such as "Magnetism and
Magnetic Materials" by J. M. D. Coey (Figure 6.9 and 6.10) [2] and
Quantum Theory of Magnetism by R. M. White (Fig. 4.2) [3] defining
AFM type I, II, and/or III for bcc and fcc lattices. The bcc and
fcc lattices are listed under the 14 Bravais Lattices
in the table at [4].<br clear="none">
</p>
<p>The article titled "Ferromagnetic and antiferromagnetic spin
fluctuations and superconductivity in the hcp-phase of Fe" [5]
defines AFM type II as having opposite polarization on each layer
perpendicular to the x-axis.</p>
<p>The article titled "Electronic origins of the magnetic phase
transitions in zinc-blende Mn chalcogenides" [6] defines AFM type
II as a super-lattice of period <i>p</i> = 1 and layer
orientation G = (111).<br clear="none">
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<p>Since there seems to be varying definitions for the AFM types, it
is unknown what your AFM type II and III are as you did not
provide the definition for it using words or images like in those
books and articles.<br clear="none">
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[1] <a rel="nofollow" shape="rect" class="yiv3431286615moz-txt-link-freetext" target="_blank" href="https://en.wikipedia.org/wiki/Hexagonal_crystal_family">https://en.wikipedia.org/wiki/Hexagonal_crystal_family</a><br clear="none">
[2] <a rel="nofollow" shape="rect" class="yiv3431286615moz-txt-link-freetext" target="_blank" href="https://doi.org/10.1017/CBO9780511845000">https://doi.org/10.1017/CBO9780511845000</a><br clear="none">
[3] <a rel="nofollow" shape="rect" class="yiv3431286615moz-txt-link-freetext" target="_blank" href="https://www.springer.com/gp/book/9783540651161">https://www.springer.com/gp/book/9783540651161</a><br clear="none">
[4] <a rel="nofollow" shape="rect" class="yiv3431286615moz-txt-link-freetext" target="_blank" href="https://en.wikipedia.org/wiki/Crystal_structure#Lattice_systems">https://en.wikipedia.org/wiki/Crystal_structure#Lattice_systems</a><br clear="none">
[5] <a rel="nofollow" shape="rect" class="yiv3431286615moz-txt-link-freetext" target="_blank" href="https://arxiv.org/abs/cond-mat/0112382v1">https://arxiv.org/abs/cond-mat/0112382v1</a><br clear="none">
[6] <span class="yiv3431286615doi-field"><a rel="nofollow" shape="rect" class="yiv3431286615moz-txt-link-freetext" target="_blank" href="https://doi.org/10.1103/PhysRevB.48.6111">https://doi.org/10.1103/PhysRevB.48.6111</a></span>
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<div class="yiv3431286615yqt7633410008" id="yiv3431286615yqt09502"><div class="yiv3431286615moz-cite-prefix">On 1/25/2020 4:41 AM, djamel slamnia
wrote:<br clear="none">
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<div dir="ltr"><font size="3"><b>dear wien2k
user's </b></font></div>
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<div dir="ltr"><font size="3"><b>I got big
problem to creat a structure for AFM type II or type III</b></font></div>
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<div dir="ltr"><font size="3"><b><span>Compound
: H LATTICE,NONEQUIV.ATOMS: 5 <font color="#ff0000" style="background-color: inherit;">156</font>_P3m1 4 atoms ??</span><br clear="none">
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<div dir="ltr"><span><font style="background-color:inherit;" size="3"><b>any
solution ???</b></font></span></div>
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<div dir="ltr"><span><b>thanks in advance <br clear="none">
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