22. X-ray Diffraction Techniques II (Intro to Solid-State Chemistry)
Happy Friday. How is everyone? Woo! Woo! Woo! Cool. Cool. I am excited. We're going to keep talking about XRD today. We're going to pick up where we left off. So I filled in some numbers. And then, we're going to fill out this chart and really get to a deep understanding of XRD. I'll also talk about Moseley's law and a little bit about another type of XRD that is done. Now, where were we? Oh, OK. We were here. So on Wednesday-- and before we fill this chart out, I want to go back and make sure we, kind of, get this. Right? We talked about the Bragg condition. And we talked about how the unique thing about x-rays is that their wavelengths are right in that, sort of, precious distance regime of the spacing of atoms in a crystal. And so if I shine them on the crystal, then they can diffract. And they can have constructive and destructive interference, but only if they line up. And that's what the Bragg diffraction tells us. It tells us the the Bragg c...