surfnturf
Member
Broomer, I delved a little farther on this subject and found that there is a great deal of uncertainty surrounding the properties of glass. Presently, they no longer refer to it as a supercooled liquid but now call it an amorphous substance. It is the most unstructured solid that we know of, and still retains some properties of liquids. Glass does not form the bonds that you would find in other solids such as crystals. The window sagging is thought to be a result of the processes used to form the glass and not due to the forces of gravity as we were all taught in school. Still, it is true that all tanks will bow over time, the bonds in the glass are short range order bonds instead of long range bonds as a result, the glass has a fair amount of elasticity. Broomer, thanks for asking for more info, I found this stuff fascinating.