This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
 

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Mean-square atomic displacement <u²> values can be experimentally obtained from various measurements, such as thermal expansion, thermal conductivity, extended x-ray absorption fine structure (EXAFS) and the widths of the x-ray or neutron diffraction peaks.

Pair Distribution Function (PDF) analysis describes a probability of finding any two atoms at given inter-atomic distances r. Note that the RDF analysis is important for the study of non-crystalline solids. The RDFs can be experimentally measured after Fourier transformation of neutron or electron diffraction or X-ray diffraction (XRD) data.