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<![endif]--><span style="font-size:12.0pt;font-family:
"Century Gothic";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:
"Times New Roman";mso-ansi-language:EN-GB;mso-fareast-language:EN-US;
mso-bidi-language:AR-SA" lang="EN-GB"></span></p><p class="MsoNormal" style="margin-top:3.0pt;margin-right:0mm;
margin-bottom:3.0pt;margin-left:0mm;text-align:center" align="center"><b style="mso-bidi-font-weight:
normal"><span style="font-family:"Century Gothic";color:#5F5F5F;
mso-ansi-language:HR" lang="HR">Institut za fiziku, Bijenička cesta 46,</span></b></p>
<p class="MsoNormal" style="margin-top:3.0pt;margin-right:0mm;
margin-bottom:3.0pt;margin-left:0mm;text-align:center" align="center"><b style="mso-bidi-font-weight:
normal"><span style="font-family:"Century Gothic";color:#5F5F5F;
mso-ansi-language:HR" lang="HR">predavaonica u zgradi Mladen Paić</span></b></p>
<p style="margin-top:3.1pt;margin-right:0mm;margin-bottom:3.1pt;
margin-left:0mm;text-align:center" align="center"><b style="mso-bidi-font-weight:normal"><span style="font-size:14.0pt;font-family:"Century Gothic";color:#993300;
mso-ansi-language:HR" lang="HR">ponedjeljak, 29. travnja 2013., u 15:00 sati</span></b><span style="font-family:"Century Gothic"" lang="EN-GB"></span></p>
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<td style="width:453.75pt;padding:5.25pt 5.25pt 5.25pt 5.25pt" valign="top" width="605">
<p style="margin:0mm;margin-bottom:.0001pt;text-align:center;
line-height:150%" align="center"><b><span style="font-size:16.0pt;mso-bidi-font-size:
12.0pt;line-height:150%;color:#55913C" lang="EN-GB">Suvremena kristalografija
kvaziperiodičnih kristala</span></b></p>
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<p style="margin-top:5.95pt;margin-right:0mm;margin-bottom:0mm;
margin-left:0mm;margin-bottom:.0001pt;text-align:center" align="center"><b><span style="font-size:14.0pt;mso-bidi-font-size:13.5pt;font-family:"Century Gothic"" lang="EN-GB">Ognjen
Milat</span></b></p>
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<p style="margin:0mm;margin-bottom:.0001pt;text-align:center" align="center"><b><span style="font-family:"Century Gothic";mso-bidi-font-family:"Times New Roman";
mso-ansi-language:EN-US"> </span></b></p>
<p style="margin-top:5.95pt;margin-right:0mm;margin-bottom:0mm;
margin-left:0mm;margin-bottom:.0001pt;text-align:center" align="center"><b><span style="font-size:11.0pt;mso-bidi-font-size:12.0pt;font-family:"Century Gothic"" lang="EN-GB">Institut
za fiziku </span></b></p>
<p style="margin-top:5.95pt;margin-right:0mm;margin-bottom:0mm;
margin-left:0mm;margin-bottom:.0001pt;text-align:center" align="center"><b><i><span style="font-size:11.0pt;mso-bidi-font-size:12.0pt;font-family:
"Century Gothic"" lang="EN-GB">E-mail: milat@ifs.hr</span></i></b></p>
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<td style="width:453.75pt;padding:5.25pt 5.25pt 5.25pt 5.25pt" valign="top" width="605">
<p style="line-height:150%"><b><span style="font-family:"Century Gothic";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Arial" lang="EN-GB">Struktura
kvazikristala “nije” periodična, “ima” zabranjene elemente simetrije, i “ne
zna se” gdje su u njoj atomi. <br></span></b></p><p style="line-height:150%"><b><span style="font-family:"Century Gothic";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Arial" lang="EN-GB"><br></span></b></p>
<p style="line-height:150%"><b><span style="font-family:"Century Gothic";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Arial" lang="EN-GB">Sve ove
probleme suvremena kristalografija rješava: (i) uvođenjem višedimenzionalne
kristalne rešetke, (ii) primjenom ne-Euklidske metrike, (iii) delokalizacijim
diskretnih položaja atoma. Navedeni koncepti rekonstruiraju periodičnost, ali
sada na višedimenzionalnoj rešetci. Nasuprot tome, generiraju kompleksnost
strukture iako ne mijenjaju realnost samog kristala, t.j. da on postoji kao
uređena slagalina diskretnih atoma u trodimenzionalnom (3D) prostoru. <br></span></b></p><p style="line-height:150%"><b><span style="font-family:"Century Gothic";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Arial" lang="EN-GB"><br></span></b></p>
<p style="line-height:150%"><b><span style="font-family:"Century Gothic";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Arial" lang="EN-GB">Pokazat
ću kako spomenuti koncepti omogućuju proširenje analize prostornih simetrija
(translacijske, rotacijske, hijerarhijske) na sve kategorije kristala shodno
nivou regularnosti. Razložit ću kategorizaciju aperiodičkih struktura, te
pokazati kako se 3D kvaziperiodična struktura razapinje u (3+d)D periodičnu,
i obratno. Povezat ću 1D aperiodičnost Fibonaccijevog niza s njegovom 2D
periodičnosti, te iznijeti neke svoje opće predodžbe o dodatnim prostornim i
vremenskim dimenzijama. <br></span></b></p><p style="line-height:150%"><b><span style="font-family:"Century Gothic";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Arial" lang="EN-GB"><br></span></b></p>
<p style="line-height:150%"><b><span style="font-family:"Century Gothic";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Arial" lang="EN-GB">Izložit
ću svoje iskustvo u istraživanju kvazikristala, kompozitnih, moduliranih i
amorfnih kristala na primjerima: (a) 5D dekagonskog kvazikristala (Al<sub>.63</sub>Cu<sub>.24</sub>Co<sub>.13</sub>),<span style="mso-spacerun:yes"> </span>(b) 4D kompozitnog kristala (Ca/Sr<sub>14</sub>Cu<sub>24</sub>O<sub>41</sub>),<span style="mso-spacerun:yes"> </span>(c) 3D amorfne faze (Zr<sub>.75</sub>Fe<sub>.25</sub>).
Pokazat ću kako se razlikuju<span style="mso-spacerun:yes"> </span>slike
pripadnih Brillouinovih zona odnosno jediničnih ćelija (u recipročnom, odnosno
direktnom prostoru). Na osnovi tih prikaza diskutirat ću kako
kvaziperiodičnost dramatično utječe na fizička svojstva dotičnih kristala i
materijala.</span></b></p>
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<td style="width:453.75pt;padding:5.25pt 5.25pt 5.25pt 5.25pt" valign="top" width="605">
<p class="MsoNormal"><b><span style="font-size:11.0pt;mso-bidi-font-size:
12.0pt;font-family:"Century Gothic"" lang="EN-GB"> </span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;mso-bidi-font-size:
12.0pt;font-family:"Century Gothic"" lang="EN-GB">Voditelji seminara IF-a: Nikša
Krstulović i Osor Bari</span></b><b><span style="font-size:11.0pt;
mso-bidi-font-size:12.0pt;font-family:"Century Gothic";mso-ansi-language:
HR" lang="HR">šić</span></b><b><span style="font-size:10.0pt;mso-bidi-font-size:
12.0pt;font-family:"Century Gothic";mso-ansi-language:HR" lang="HR"></span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;mso-bidi-font-size:
12.0pt;font-family:"Century Gothic"" lang="HR"><span style="mso-spacerun:yes"> </span></span></b></p>
<p class="MsoNormal"><span lang="EN-GB"> </span></p>
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