# Homework 2 - (Callister 3.36 6 What is the linear density...

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Homework #2 Name _________________________________________ ENMA 300 Due Tuesday, September 21, 2010 Questions for Grading: 1. Calculate the ionic radius ratio for MgO and determine from it the coordination number for the Mg. Using the ionic radius ratio and the ionic charge (stoichiometry), predict the crystal structure of MgO. Give reasons for your prediction. 2. Calculate the theoretical density of CsCl. 3. Give the Miller indices of directions A,B,C,D in the cubic unit cell. (Callister 3.28) 4. Give the Miller-Bravais indices of the directions (A,B) in the hexagonal unit cell. (Callister 3.31) 5. Give the Miller indices of the planes (A,B) in the cubic unit cell.

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Unformatted text preview: (Callister 3.36) 6. What is the linear density of atoms along the [111] direction in an FCC unit cell. Questions for thought: 7. Would the elastic modulus be the same in the [100] and the [010] direction in a BCC metal (such as iron)? Why or why not? 8. Why is the elastic modulus of single crystal aluminum higher in the [111] direction than in the [100] direction as shown in Table 3.7 of Callister? 9. Would you expect the elastic modulus of a bulk aluminum sample to be higher in one direction than another? Why or why not? 10. What is the angular relationship between a direction in a cubic crystal and the plane with the same Miller indices?...
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Homework 2 - (Callister 3.36 6 What is the linear density...

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