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Quiz 4 potential problems ChE 350 sp10

Quiz 4 potential problems ChE 350 sp10 - (a Index the...

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Sample question for ChE 350 Spring 2010 Quiz 4 Name:________________________ 1 1. Shown below is the powder X-ray diffraction pattern for an unknown material, collected with an X-ray source with a wavelength of 0.154 nm. You believe that it has fcc crystal structure. (a) Index the peaks, assuming that the structure has fcc crystal structure. (i.e., label the Miller indices of the planes corresponding to each peak) (b) Determine the d-spacing between the planes that correspond to the third diffraction peak at 0 68 2 = θ (show your work below): ______________________________ (c) Calculate the lattice parameter, a , of the material, assuming an fcc crystal structure (show your work below): ____________________________ 2. Shown below is the powder X-ray diffraction pattern for tungsten, which has a bcc structure. The data were collected with an X-ray source with a wavelength of 0.154 nm.
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Unformatted text preview: (a) Index the peaks. (i.e., label the Miller indices of the planes corresponding to each peak) (b) Determine the d-spacing of the first peak at 40 2 = (show your work below): ___________ (c) Calculate the lattice parameter, a (show your work below): ____________________ Sample question for ChE 350 Spring 2010 Quiz 4 Name:________________________ 2 3. Shown below is the powder X-ray diffraction pattern for aluminum, which has a fcc structure. The data were collected with an X-ray source with a wavelength of 0.154 nm. (a) Index the peaks. (i.e., label the Miller indices of the planes corresponding to each peak) (b) Determine the d-spacing of the peak at 02 . 65 2 = θ (show your work below): ___________ (c) Calculate the lattice parameter, a (show your work below): ____________________...
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