1 A The Powder X Ray Diffraction Pattern For A Sample Of Metallic Silver Measured At Room Temperature Is Shown Below 1 (43.29 KiB) Viewed 25 times
1. (a) The powder X-ray diffraction pattern for a sample of metallic silver measured at room temperature is shown below. Each reflection is labelled with its Miller indices, (h k I). (111) (311) (220) Intensity (200) (222) O 18 27 36 45 54 63 72 81 90 20/
The first observed reflection in the powder X-ray pattern has a two- theta (20) value of 38.117° and a corresponding d-spacing of 2.359 Å. Determine: (i) The wavelength of the X-rays used in the diffraction experiment. (0.5 marks) (ii) The lattice parameter, a, for silver. (0.5 marks) (iii) What is the multiplicity of the set of {111} planes in the cubic system? List the equivalent reflections. (2 marks)
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