What do i and j stand for here? My teacher substituted them for masses (in our example, atoms in a molecule) although I'm not sure that makes sense since when you take the Hessian force constant matrix (on the next page of the link) I believe it must have dimensions determined by the number of degrees of freedom. In other words, for a two mass system (diatomic) wouldn't you have a 6x6 matrix? Is this correct? Again, what do i and j stand for?(adsbygoogle = window.adsbygoogle || []).push({});

From Feynmann's book on Statistical Mechanics:

http://books.google.com/books?id=4Y... order to motivate the procedure that&f=false

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Vibrations of diatomic molecules

**Physics Forums | Science Articles, Homework Help, Discussion**