  In the present paper we discuss the properties of Voronoi polygons in several
monatomic glass-forming systems and compare them with those of the Kob-Andersen
mixture. We show that two mechanisms of glass formation are possible: smearing
of Voronoi polygons or formation of polygons of two different shapes. Both
mechanisms lead to disturbance of the crystalline order in the system and glass
transition.

Soft Condensed Matter