In this work, we outline a computational method for quantifying electronegativity, partial charge and volume of atoms and ions inside crystalline materials. Our approach follows previous efforts where these same conceptually important properties are calculated for atoms inside molecules. The quantification of concepts such as electronegativity, size and the disposition of electrons inside materials is fraught by difficult choices of how to do so. But quantify them we must, for they are often helpful for rationalizing aspects of observable chemistry. Challenges arise because there exist no one unique definition to either property, but a plethora of methods, scales, and principles. We note that relatively few approaches are computationally practical and applicable to extended (e.g., solid state) systems, as opposed to molecules. Among these approaches, the Quantum Theory of Atoms in Molecules (QTAIM) by Richard Bader, in primis, gave to theoreticians and experimentalists a unique tool to calculate, among several other properties, atomic charges and atomic volumes inside of materials from the electron density. Hirshfeld, instead, proposed an alternative way to decompose real space into atomic fragments based on the weighted contribution of each atoms to the total electron density of a system. Together with other types of geometrical partitions, like the Voronoi cells, those methods became useful and efficient ways to compute atomic charges in periodic systems.