Approaches to modelling thermal diffuse scattering in triglycine sulfate, (NH₂CH₂COOH)₃·H₂SO₄

The thermal diffuse scattering in triglycine sulfate, (NH₂CH₂COOH)₃·H₂SO₄, has been modelled by treating the intermolecular interactions that give rise to the correlated atomic displacements like Hooke's law springs. To limit the number of variables in the model, the force constants for the interactions were parameterized in a number of ways, the most successful of which was an empirical interaction potential using an exponential function of the interatomic separations.