Last Update 27/ 01/ 2002
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Objective
Aid the understanding of the dynamic equilibrium, by means of a simple artistic model of chemistry employing a program of graphical animation where the number of atoms in the solid state does not change but many morphological dispositions are possible. Three different arranges appear randomly.
Introduction
The animation shows a hypothetical situation of a small portion of 31 atoms of solid gold circled by 40 atoms of liquid gold in two dimensions. Each yellow disc represents a gold atom. The discs in movement represent a layer of pairs of atoms in the liquid state in ordered vibration, whose order is suggested by the fact of being too close to the crystal of gold. The stationary discs represent the atoms of gold of the face with Miller indices (1 0 0) of the crystal in dynamic equilibrium with the liquid at melting temperature (1064.18o C). The liquid material further from the crystal was not represented, but it will vibrate randomly, with no particular order. The vibration of the atoms in solid crystal was not represented, because its intensity is much smaller than the liquid.
The disposition of the atoms of gold in the solid crystal (in dynamic equilibrium with the liquid) is identical to a set of adjacent faces (1 0 0) of the gold unit cell, as represented by this application.
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