<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:14px"><div id="yiv8634689092" class="" style=""><div class="" style=""><div style="background-color: rgb(255, 255, 255);" class=""><div id="yiv8634689092" class="" style=""><div id="yiv8634689092yui_3_16_0_1_1411395354209_51421" class="" style=""><div style="background-color: rgb(255, 255, 255);" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_51420"><div id="yiv8634689092" class="" style=""><div id="yiv8634689092yui_3_16_0_1_1411395354209_39584" class="" style=""><div style="background-color: rgb(255, 255, 255);" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_39583"><div id="yiv8634689092" class="" style=""><div id="yiv8634689092yui_3_16_0_1_1411395354209_29414" class="" style=""><div style="background-color: rgb(255, 255, 255);" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_29413"><div
id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 14px;"><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style="color:rgb(0, 0, 0);font-family:'times new roman', 'new york', times, serif;"><span style="font-size:16px;" id="yiv8634689092yui_3_16_0_8_1411395354209_78" class="">Dear QE users ans developers, </span></div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style="color:rgb(0, 0, 0);font-family:'times new roman', 'new york', times, serif;"><span style="font-size:medium;" class=""><br style=""></span></div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style="color:rgb(0, 0, 0);font-family:'times new roman', 'new york', times, serif;"><span style="font-size:medium;" id="yiv8634689092yui_3_16_0_1_1411395354209_51419" class="">I did the phonons calculation of the binary AlN (rocksalt) with 16 atoms
.</span></div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style="color:rgb(0, 0, 0);font-family:'times new roman', 'new york', times, serif;"><span style="font-size:medium;" class=""><br class="" style=""></span></div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style="color:rgb(0, 0, 0);font-family:'times new roman', 'new york', times, serif;"><span style="font-size:medium;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_51428">My output files is as following:</span></div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style="color:rgb(0, 0, 0);font-family:'times new roman', 'new york', times, serif;font-size:14px;"><br class="" style=""></div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> Diagonalizing the dynamical matrix</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""><br class="" style=""></div><div
id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> q = ( 0.000000000 0.000000000 0.000000000 ) </div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""><br class="" style=""></div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> **************************************************************************</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 1) = 1.108833 [THz] = 36.986674 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 2) = 1.574620 [THz] = 52.523675 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 3) = 1.575398 [THz] =
52.549629 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 4) = 8.195754 [THz] = 273.380916 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 5) = 8.196815 [THz] = 273.416304 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 6) = 8.199734 [THz] = 273.513674 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 7) = 8.200351 [THz] = 273.534269 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 8) = 8.201724 [THz] =
273.580054 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 9) = 8.204042 [THz] = 273.657390 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 10) = 8.204069 [THz] = 273.658277 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 11) = 8.204305 [THz] = 273.666167 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style="">
freq ( 12) = 9.560810 [THz] = 318.914296 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 13) = 9.561375 [THz] = 318.933138 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 14) = 9.564736 [THz] = 319.045240 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 15) = 9.565551 [THz] = 319.072451 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 16) = 9.568429 [THz] = 319.168422 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 17) =
9.569095 [THz] = 319.190663 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 18) = 12.351077 [THz] = 411.987578 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 19) = 12.431223 [THz] = 414.660977 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 20) = 12.439828 [THz] = 414.947983 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 21) = 12.782122 [THz] = 426.365702 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 22) = 12.796523 [THz] =
426.846069 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 23) = 12.854425 [THz] = 428.777481 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 24) = 12.908753 [THz] = 430.589665 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 25) = 12.916648 [THz] = 430.852986 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 26) = 12.923203 [THz] = 431.071665 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 27) = 12.940057 [THz] = 431.633836 [cm-1]</div><div
id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 28) = 12.951841 [THz] = 432.026913 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 29) = 13.043933 [THz] = 435.098776 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 30) = 13.090098 [THz] = 436.638683 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 31) = 13.091268 [THz] = 436.677691 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 32) = 16.509761 [THz] = 550.706361 [cm-1]</div><div
id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 33) = 16.566717 [THz] = 552.606181 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 34) = 16.587373 [THz] = 553.295203 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 35) = 16.640103 [THz] = 555.054089 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 36) = 16.658006 [THz] = 555.651280 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 37) = 16.692001 [THz] = 556.785223 [cm-1]</div><div
id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 38) = 19.936035 [THz] = 664.994532 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 39) = 19.939099 [THz] = 665.096767 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 40) = 19.940916 [THz] = 665.157356 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 41) = 19.955181 [THz] = 665.633197 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 42) = 21.966886 [THz] = 732.736442 [cm-1]</div><div
id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 43) = 21.984557 [THz] = 733.325899 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 44) = 22.013871 [THz] = 734.303712 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 45) = 22.697394 [THz] = 757.103583 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 46) = 22.729742 [THz] = 758.182599 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 47) = 22.771292 [THz] = 759.568539 [cm-1]</div><div
id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> freq ( 48) = 22.788849 [THz] = 760.154171 [cm-1]</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""> ***********************************************************************</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""><br class="" style=""></div><div id="yiv8634689092yui_3_16_0_6_1411395354209_4" class="" style=""><span style="font-size:16px;" id="yiv8634689092yui_3_16_0_8_1411395354209_80" class="">It has 16 atoms then we have 48 frequencies, 3 acoustic (which tend to 0) and 46 optical frenquencies, but how can I differentiate between longitudinal and transverse waves frequency?</span><br class="" style=""></div><div class="" style="" id="yiv8634689092yui_3_16_0_1_1411395354209_42241"><br class="" style=""></div></div><div id="yiv8634689092yui_3_16_0_6_1411395354209_8"
class="" style="">with respectful regards<br class="" style=""></div><div id="yiv8634689092yui_3_16_0_6_1411395354209_8" class="" style="">Said Asma</div><div id="yiv8634689092yui_3_16_0_6_1411395354209_10" style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 14px;" class=""><div style="font-family:garamond, 'new york', times, serif;font-size:16px;line-height:normal;background-color:transparent;font-style:italic;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_3035"><br class="" style="">***********************************************</div><div style="line-height:normal;" id="yiv8634689092yui_3_16_0_1_1411395354209_3075" class=""><span style="background-color:rgb(255, 255, 255);" id="yiv8634689092yui_3_16_0_1_1411395354209_3086" class=""><span style="color:rgb(69, 69, 69);font-style:italic;" id="yiv8634689092yui_3_16_0_1_1411395354209_3085" class=""><span style="font-family:garamond, 'new york', times,
serif;font-size:16px;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_3084"><span style="color:rgb(0, 0, 0);font-style:normal;" id="yiv8634689092yui_3_16_0_1_1411395354209_3083" class=""><span style="font-style:italic;" id="yiv8634689092yui_3_16_0_1_1411395354209_3082" class="">Said
Asma,</span></span><span style="color:rgb(0, 0, 0);font-style:normal;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_29614"><span style="font-style:italic;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_29613"> </span></span></span></span></span></div><div style="line-height:normal;color:rgb(0, 0, 0);font-size:16px;font-family:garamond, 'new york', times, serif;background-color:transparent;font-style:italic;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_3076"><span style="background-color:rgb(255, 255, 255);" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_40417"><span style="color:rgb(69, 69, 69);font-style:italic;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_40416"><span style="font-family:garamond, 'new york', times, serif;font-size:16px;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_40415"><span style="color:rgb(0, 0, 0);font-style:normal;" class=""
id="yiv8634689092yui_3_16_0_1_1411395354209_40414">PhD. LMCN,</span></span></span></span></div><div style="line-height:normal;color:rgb(0, 0, 0);font-size:16px;font-family:garamond, 'new york', times, serif;background-color:transparent;font-style:normal;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_3077"><span style="background-color:rgb(255, 255, 255);" id="yiv8634689092yui_3_16_0_1_1411395354209_3108" class=""><span style="color:rgb(69, 69, 69);font-style:italic;" id="yiv8634689092yui_3_16_0_1_1411395354209_3107" class=""><span style="font-family:garamond, 'new york', times, serif;font-size:16px;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_3106"><span style="color:rgb(0, 0, 0);font-style:normal;" id="yiv8634689092yui_3_16_0_1_1411395354209_3105" class=""><font id="yiv8634689092yui_3_16_0_1_1411395354209_3104" class="" style="">Faculté des sciences de Monastir,</font></span></span><br class="" style=""></span><span
style="font-style:italic;font-family:garamond, 'new york', times, serif;font-size:16px;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_3109">Avenue de l'environnement
5019-Monastir,Tunisie</span></span></div><div id="yiv8634689092yui_3_16_0_1_1411395354209_3078" class="" style=""><span style="background-color:rgb(255, 255, 255);" id="yiv8634689092yui_3_16_0_1_1411395354209_3112" class=""><span style="font-size:16px;line-height:normal;font-style:italic;font-family:garamond, 'new york', times, serif;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_3111">E-mail :<a rel="nofollow" id="yiv8634689092yui_3_16_0_1_1411395354209_3110" class="" style="" href="">saidasma1987@yahoo.fr</a></span></span></div><div id="yiv8634689092yui_3_16_0_1_1411395354209_3079" class="" style=""><span style="background-color:rgb(255, 255, 255);font-family:garamond, 'new york', times, serif;font-size:16px;" class="" id="yiv8634689092yui_3_16_0_1_1411395354209_3113">***********************************************</span></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></body></html>