where 𝐹 1-23 is the value of the atomic basin condensed property. In Figure we see that kinetic energy accumulates at and near bond paths (positive Δ𝒯 ./0 values), and that there is a precise boundary separating these regions from those of kinetic energy depletion. Like all closed paths through gradient bundle condensed property fields, the Δ𝒯 ./0 = 0 contour (separating blue from red in Figure ) specifies a precise zero-flux surface bounded region in 𝜌. Due to the virial theorem, we know that for systems where no forces are acting on the atoms, within regions bounded by zero-flux surfaces the total regional kinetic energy is equal and opposite to the total energy . So, in this case, the regions in 𝜌 specified by the Δ𝒯 ./0 = 0 contour separates regions of total energetic stabilization from those of destabilization. We note that our calculations use the non-interacting kinetic energy density, which recovers more than 99% of the total kinetic energy and is sufficient at this time.