Question # 2 (a) Calculate the linear atomic density in atoms per millimeter for the following...

   

Transcribed Image Text:

Question # 2 (a) Calculate the linear atomic density in atoms per millimeter for the following directions in FCC iridium, which has a lattice constant of 0.38389 nm: (i) [100], (ii) [110], (iii) [111].. [06] (b) A Debye-Scherrer powder diffraction experiment using incident copper (Cu) Ka radiation gave the following set of reflections expressed as 20: 38.40°; 44.50°; 64.85°; 77.90°; 81.85°; 98.40°; 111.20°. Investigate the followings: - (i) Determine the crystal structure. (ii) Calculate the lattice constant, a. (iii) Assume that the crystal is a pure metal and on the basis of the hard-sphere approximation calculate the atomic radius. (iv) Calculate the density of this element which has an atomic weight of 66.6 g/mol. [3+3+4+4] (c). Suppose you want to analyze/characterize a powder sample using X-ray diffraction. Which geometry you would prefer to use and why? Summarize it's parameters. [5] Question # 2 (a) Calculate the linear atomic density in atoms per millimeter for the following directions in FCC iridium, which has a lattice constant of 0.38389 nm: (i) [100], (ii) [110], (iii) [111].. [06] (b) A Debye-Scherrer powder diffraction experiment using incident copper (Cu) Ka radiation gave the following set of reflections expressed as 20: 38.40°; 44.50°; 64.85°; 77.90°; 81.85°; 98.40°; 111.20°. Investigate the followings: - (i) Determine the crystal structure. (ii) Calculate the lattice constant, a. (iii) Assume that the crystal is a pure metal and on the basis of the hard-sphere approximation calculate the atomic radius. (iv) Calculate the density of this element which has an atomic weight of 66.6 g/mol. [3+3+4+4] (c). Suppose you want to analyze/characterize a powder sample using X-ray diffraction. Which geometry you would prefer to use and why? Summarize it's parameters. [5]

Answer rating: 100% (QA)

Solution Considering the conditions po... View the full answer