  Atom probe tomography enables precise quantification of the composition of
second phase particles from their early stages, leading to improved
understanding of the thermodynamic and kinetic mechanisms of phase formation
and quantify structure-property relationships. Here we demonstrate how
approaches developed for small-angle scattering can be adapted to atom probe
tomography. By exploiting nearest-neighbor distributions and radial
distribution function, we introduce a parameter free methodology to efficiently
extract information such as particle size, composition, volume fraction, number
density and inter-particle distance. We demonstrate the strength of this
approach in the analysis of a precipitation-hardened model Al-Zn-Mg-Cu
high-strength lightweight alloy.
