hw2_solution__

hw2_solution__ - an fcc metal (h,k,l unmixed). What would...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Q1: Calculate the density of Mg, an hcp metal. The ideal c/a ratio (height of the unit cell divided by its length) is 1.633
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
(a) Show that the c/a ratio is 1.633 for the ideal hcp structure. (b) Comment on the fact that real hcp metals display c/a ratios varying from 1.58 (for Be) to 1.89 (for Cd).
Background image of page 2
Q3: (a) Sketch, in a cubic unit cell, [100] and [210] directions. (b) Use a trigonometric calculation to determine the angle between these directions. (c) Use equation below to determine this angle.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Q4: The diffraction peaks in the following figure correspond to the reflection rules for
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: an fcc metal (h,k,l unmixed). What would be the (hkl) indices for the three lowest diffraction-angle peaks for a bcc metal? Q5: Using the result from question Q4, calculate the diffraction angles (2 ) for the first three peaks in the diffraction pattern of a-Fe powder using Cu-K-radiation ( =0.1542 nm). Q6: Calculate the density of Schottky pairs (in m-3 ) in CaO if the fraction of vacant lattice sites is 5x10-6. (The density of CaO is 3.45x10 6 g/m 3 )...
View Full Document

This note was uploaded on 04/15/2010 for the course ECM 995678 taught by Professor Derkins during the Spring '10 term at Concord.

Page1 / 6

hw2_solution__ - an fcc metal (h,k,l unmixed). What would...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online