Structure of glass

Looking at glass, it is difficult to imagine that this material has a rather complex structure. It seems absolutely amorphous, although in fact this idea is wrong. Oddly enough, it took modern science centuries to understand this.

Not a crystal or liquid

Externally, glass is very similar to ice. Certain parallels can be drawn between them: both substances are formed from crystals (water or quartz), which first melt and then, quickly cooling, acquire such an unusual appearance.

In the 20s In the last century, the so-called “crystallite” theory appeared, which assumed that the basis of glass was submicroscopic crystals arranged in a chaotic order. To prove it, an entire laboratory was created exclusively to study this issue. X-ray scattering was used as the main research method. The results obtained could not confirm the hypothesis, but served as a serious impetus for the development of glass science in general.

Greater success was achieved by V. Zachariasen, who argued that the basis is based on structures inherent in crystals, but interconnected without strict periodicity. As a result, “bourgeois science” still prevailed: the ideas expressed by the Swedish researcher turned out to be closer to the truth and to modern ideas about how glass actually works . Without getting into the jungle of physics and chemistry, we can say that it is neither a crystalline solid whose atoms are arranged in a strict order, forming a so-called crystal lattice, nor a superviscous liquid in which only neighboring molecules are ordered relative to each other.

In this regard, there was even a need to introduce such a concept as a “glassy state,” which, despite a century of intense scientific research, still attracts the attention of many scientists (both theorists and practitioners). This is largely due to the fact that the very concept of “glass” is quite arbitrary. Various raw materials can be used to produce this material. You should also take into account additives designed to impart special properties to glass. The more components are included in the initial mixture (the so-called charge), the more complex the structure of the final product will be.