Carbonate Minerals and Other Samples Studied by Far IR ATR Spectroscopy

The far IR or THz spectral region, which lies below 400 cm-1, is important for the study of inorganic substances which involve vibrations of heavier atoms. External or lattice vibrations, which are sensitive to crystal structure and polymorphism, can be seen also for both inorganic and organic solid samples. However it was not always that straightforward to obtain high quality far IR spectra, due to inherent weak sources and rather insensitive room temperature detectors, but the latest technical developments now make it much easier.