Recent content by Raziel2701

What would happen to the XRD pattern if instead of having spherical atoms, we had triangular atoms? I found the optical diffraction pattern for a triangular aperture, but I'm not sure if optical diffraction patterns would be the same as XRD patterns.

Google has not been very useful, and Kittel has too little on crystallography. Actually, what's a good source on crystallography?

Is there a specific reason for how compounds are named? Like NaCl for instance, what's the criteria to have NaCl rather than ClNa?

So the reason for the existence of BCC metals has to do with magnetic characteristics? Ok that is definitely a good thing to think about. Unfortunately I don't know much about those. In any case, thanks for showing me this.

For metals for instance, is the metallic bond that determines the crystal structure(i.e. FCC (face centered cubic), HCP (hexagonal close packed)) or is the crystal structure that determines the type of bond? In other words, if someone were to ask me what kind of bond an element with an FCC...

I'm supposing that it has something to do with the fact that it is no longer in a lattice, so it's just one Na and one Cl ion bonding together but why would it be a mostly covalent bond in this case?

If FCC and HCP are the ones with the highest atomic packing factor, why would there be metals with BCC structures?

\frac{Ns-L}{L+Ns} What does that reduce to if L << Ns ? Obviously setting L to zero leads me nowhere since that argument above is actually inside a logarithm. I don't know how to perform the approximation. And the answer can't be zero by the way. Is there something I can do here? Usually the...

Thank you both. That's a really good way of quickly remembering what those energies can do.

http://i.imgur.com/G36U3.jpg It's been posted in an obscure corner of the physics department forever and I think it'd be nice to know what the heck this is all about. Thanks!

Why don't you show us your work? Your answer is not right yet, you were closer the first time. Mind you that this thread should be at the homework help section.

You should only be using two formulas. One involves KE in terms of momentum and mass, and the other relates momentum and wavelength. Your answer is off by a factor of 1/2 so I'm guessing that you are making some mistake in your math. So why don't you show us what you've done?

I think the guy on the second part of the thread who's touching on spin was getting closer to the point of my question. I still don't know what's responsible for the work we see when a paperclip gets pulled in by a magnet.

When a magnet pulls a paperclip, what exactly is doing work on the paperclip? It cannot be a magnetic force can it? I thought it was a very strong statement that I read in my intro physics book and even Griffiths(pg. 207) that magnetic forces do no work. So what is responsible for accelerating a...

Homework Statement I want to derive the square of the total angular momentum as shown here: http://en.wikipedia.org/wiki/Angular_momentum_operator#Angular_momentum_computations_in_spherical_coordinates Homework Equations The x,y, and z components of angular momentum are shown in the...