Re: ice & water

[Leigh Palmer <palmer@SFU.CA>]

> As I teach about water's unusual properties, we always discuss how water
> expands as it freezes from 4ƒ C to 0ƒ C, and I have explained that the
> lattice framework of ice crystals is forming.  This structure has more
> volume than the liquid water.  I have thought that the extra volume is
> taken up by empty space, but I have seen numerous references in the
> textbooks which say the space is not space but is trapped air.
> Am I mistaken, or is this another case of textbook error?

It's called "nonsense". High school textbooks are full of it.
Oh yes, it goes by other, less acceptable names too.

Leigh