The answer to my last blog, earlier today, 25th July 2012
When is a crystal not a crystal? Whan its a glass!
Glass is an amorphous solid and does not have a regular crystal lattice structure.
However, it is a solid and not a very viscous liquid as the urban legend about very old glass in the windows of churches might have it. Wikipedia gives a good account of the stories and the way early glass was manufactured and used.
So how come atoms go free, but ions don’t?