12.108  Structure of Earth Materials

Labs and quiz 1 next wednesday

Hi all!

Your stereonet lab is corrected, it is on my office door (54-710) , you can pick it up whenever you want. It would be great if you turned in your XRD lab soon so you can have the correction before the quiz on Wednesday. You can leave it in my door.

For the quiz....
You will have access to the 2d space group and the 3d point group hand-outs. You will be tested on lab materials so you should know:

- 2D space groups (wallpaper groups): identify symmetry elements and unit cell.
- 3D symmetry: identify symmetry elements and find point group.
- Sphere packing and related symmetry: difference between ABAB and ABCABC, symmetry elements of each.
- Polyhedral models: identify coordination models in a crystal structure.
- Stereonets: draw vectors and planes, measure angles on stereonets.
- XRD: application of Bragg's law (.. and Bragg's law itself!)
- Reciprocal lattice: construct a reciprocal lattice for a simple lattice (for instance, a monoclinic one).

I will be around on Monday and Tuesday if you have questions.
Have a nice weekend!

Alejandra

Announced on 15 March 2013  12:20  p.m. by Alejandra Quintanilla Terminel