In X-ray Diffraction (XRD), what is the primary reason for the occurrence of 'extinctions' or systematically absent reflections for certain crystal planes?
Question 2
Consider a material undergoing a phase transformation from a body-centered cubic (BCC) to a face-centered cubic (FCC) structure upon heating. How would this transformation be observed in an in-situ X-ray Diffraction (XRD) experiment?
Question 3
When performing residual stress measurements using the $\sin^2\psi$ method, the stress-free lattice spacing ($d_0$) is a critical parameter. If an accurate $d_0$ value is not known, what is the most appropriate method to determine it for a given material?
Question 4
In the context of X-ray Diffraction (XRD) for crystallography analysis, what is the significance of the 'Lorentz-polarization factor' ($LP$) in calculating theoretical diffraction peak intensities?
Question 5
A material exhibits significant peak broadening in its X-ray Diffraction (XRD) pattern. If this broadening is primarily due to both crystallite size and microstrain, which of the following methods is most suitable for deconvoluting these two contributions?
