Recent content by james477

Thanks, That makes sense - not quite sure how i would go about it but i'll give it some more thought.

So say I have a unit cell containing 1 atom of type X and 1 of type Y - this means that i can find the total volume of atoms per unit cell and i know the volume of the cell. But how would i go about finding the radii of these atoms which results in the maximum packing fraction? This is where i...

Hi, I understand that the maximum packing fraction for a particular atomic structure can be calculated assuming the nearset neighbours are touching but my question is how can the maximum packing fraction be calculated for a basis containing two different types of atoms? Thanks, James

Thanks, that's much clearer :)

Hi, i am having trouble understanding a section of a QM course concerning degenerate eigenstates. Suppose that some operator B is compatible with A (so A and B have a common eigenbasis). My notes say that this means that some r and r+pi/2 give eigenstates of both A and B in the form |a(r)> =...

Ok i see... Incidently, how is the Schrödinger equation in momentum space written?

Can anyone explain how to derive the Schrödinger equation in momentum space?