When it’s a glass

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.

Image

So how come atoms go free, but ions don’t?

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