  We propose the new method of fluid structure investigation which is based on
numerical analytical continuation of structural correlation functions with Pade
approximants. The method particularly allows extracting hidden structural
features of non-ordered condensed matter systems from experimental diffraction
data. The method has been applied to investigating the local order of liquid
gallium which has non-trivial stricture in both the liquid and solid states.
Processing the correlation functions obtained from molecular dynamic
simulations, we show the method proposed reveals non-trivial structural
features of liquid gallium such as the spectrum of length-scales and the
existence of different types of local clusters in the liquid.

Materials Science;Soft Condensed Matter;Chemical Physics;Computational Physics