Lecture slides on quasicrystals

Tomorrows lecture will consider the fascinating subject of quasicrystals, the subject of last years Nobel Prize in Chemistry. Here are the lecture slides.

This is not covered in Ashcroft and Mermin, for profound reasons.
Instead you could read Section 5.8 of Marder, or the notes on the Nobel Prize site.
The lesson is don't believe everything the textbooks (and your lecturers) say!