  The transition from ordered to disordered structures in Voronoi tessellation
is obtained by perturbing the seeds that were originally identified with two
types of lattice in 2D and one type in 3D. The area in 2D and the volume in 3D
are modeled with the Kiang function. A new relationship that models the scaling
of the Kiang function with a geometrical parameter is introduced. A first
application models the local structure of sub- and supercritical ammonia as
function of the temperature and a second application models the volumes of
cosmic voids.
