Some interesting links for this course

Crystal structure

http://cst-www.nrl.navy.mil/lattice/

http://www.dawgsdk.org/crystal/en/library/

Periodic Tables

http://chemistry.about.com/library/blperiodictable.htm

http://www.infoplease.com/periodictable.php

http://chemistry.about.com/library/pdfs/PeriodicTableNaturalState.pdf

Dispersion curves

http://fermi.la.asu.edu/ccli/applets/phonon/index.html