# HW01 - 7(10 p State the point group that results if a...

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EMSE 312 FALL 2011 DIFFRACTION PRINCIPLES Homework Assignment #1 Due: Monday September 26, 2011 Total 100 points 1. (10 p) What point group is developed through the interaction of two symmetry planes at (a) 45 ° to each other? (b) 30 ° to each other? 2. (10 p) What point group is developed through the interaction of two 2-fold proper rotation axes at (a) 60 ° to each other? (b) 90 ° to each other? 3. (10 p) Cullity and Stock Problem Problem 1-3 4. (10 p) Azaroff Problem 1-5 5. (10 p) To which point groups do the following belong? (a) a brick, (b) an octahedron, (c) a tetrahedron, (d) a book (ignoring lettering), and (e) the letters A, B, G and N.

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6. (10 p) (a) List all symmetry operations in a water ( ) 2 HO molecule? (b) List all symmetry operations in an Egyptian pyramid?
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Unformatted text preview: 7. (10 p) State the point group that results if a center of symmetry is added to a point occupying (a) the point group 1; (b) the point group 2; (c) the point group 3; (d) the point group 4; (e) the point group 6; (f) the point group 222; (g) the point group 422; (h) the point group 432; (i) the point group 23; and (j) the point group 32. Note: A center of symmetry is an inversion point 8. (10 p) An object of point symmetry m3m(Oh) distorts under a uniaxial. (a) What is the point group of the distorted object if the stress is applied along [001]? (b) What is the point group of the distorted object if the stress is applied along [111]? 9. (10 p) Azaroff Problem 3-9 10. (10 p) Azaroff Problem 4-5...
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## This note was uploaded on 12/01/2011 for the course EMSE 312 taught by Professor Lagerlof,p during the Spring '08 term at Case Western.

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HW01 - 7(10 p State the point group that results if a...

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