Defects in Crystals

© Prof. Dr. Helmut Föll

University of Kiel; Faculty of Engineering

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Defects in Crystals - the Original
a) Interstitial impurity atom, b) Edge dislocation, c) Self interstitial atom, d) Vacancy, e) Precipitate of impurity atoms, f) Vacancy type dislocation loop, g) Interstitial type dislocation loop, h) Substitutional impurity atom
  This is a schematic drawing of various crystal lattice defects;
illustrating parts of what this lecture course is about.
{short description of image} It is a remarkable picture because it keeps popping up - sometimes slightly modified - in books and articles about defects in crystals.
Well - this is the original. I drew it (manually, with ink and stencils) in 1976 as part of my Ph.D. work.
Since then, this little beauty has started to migrate around, and the original source is so obscure that one might consider it lost.
{short description of image} Do I mind? Not at all! I always get a kick out of running across it every now and then.
Having made this statement I sincerely hope that all my colleagues, whose work I might have used unknowingly in this Hyperscript, share my feeling. If not, please get in touch, and I will correct whatever errors and copyright infringements I might have made.
  Now use the link to an alternative page that shows a real defect
and gives some reasons why defects are important.

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A Word of Warning and an Offer

This Hyperscript was not optimized for easy downloading, but contains good (large-size) illustrations. If you would like to have it, send an e-mail for a free CD.
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This Hyperscript is essentially a collection of (embellished) lecture notes. There are certainly still typos and real mistakes - use at your own risk.
However, Prof. John R. Abelson from the University of Illinois at Urbana-Champaign was kind enough to read through most if the Hyperscript and helped me to correct many mistakes. For this I am indebted to him.
If you want to participate in adding pages, illustrations, formulas, JAVA modules and the like, or simply offer advice or comments, please contact
Adress e-mails to {short description of image}. You must type it in, because direct links are susceptible to abuse.
Disclaimer: (Required by German Law)
Hiermit distanziere ich mich ausdrücklich von allen Inhalten aller gelinkten Seiten auf dieser Homepage und mache mir diese Inhalte nicht zu eigen. Diese Erklärung gilt für alle auf meinen Seiten angebrachten Links, die außerhalb meines direkten Einflussbereiches liegen.
H. Föll
Herewith I declare that I have nothing whatsoever to do with the content of linked pages as far as they are not my own, or not within my direct sphere of influence.
H. Foell