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<p>[QUOTE=&quot;Pavlos, post: 3205420, member: 96635&quot;]I used metals as example because we are talking about metals at the moment, copper, tin, nickel, silver etc. Yes, for example the increase of temperature causes an increase in kinetic energy causing the atoms to take more between eachother meaning the interstitial space between the atoms bigger.</p><p><br /></p><p>Interstitial space has a big relationship in the crystal lattice, as I explained before,&nbsp; if there are too many impurities or other metals/molecules are present, there is no way crystals can be formed or the crystals will be defect.</p><p><br /></p><p><img src="http://www.substech.com/dokuwiki/lib/exe/fetch.php?w=&amp;h=&amp;cache=cache&amp;media=point_defects.png" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>Here a clearer picture of the crystal structure of an alloy, if there is an interstitial alloy, how can a metal tightly pack together and form an arranged structure? It can&#039;t because the interstitial space between the atoms is too big (caused by the other metal or molecule, depends). If you have a substitutional alloy, how can a crystal be formed anyway, the atoms are not the same and randomly distributed, this one is even more impossible (a crystal is the purest form of a molecule or atom).</p><p><br /></p><p><img src="https://www.learner.org/courses/chemistry/images/lrg_img/alloy.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>A totally other piece of chemistry, I work a lot with polymers, if 4 of the 100 monomers (let&#039;s say it is an isomer) is turned left and the other 96 of 100 is turned right, no crystals will form at all and the polymer stay amorphic. We are talking about the same molecule with the exact same atoms yet because of the orientation of the molecule it can not make tightly packed crystals anymore, so no crystals will be formed.</p><p><br /></p><p>I hope you understand now the meaning of interstitial space and that an alloy pretty much never crystallizes.[/QUOTE]</p><p><br /></p>

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