[Rockhounds] Another extinction impact-13 KYA

[donhalterman at verizon.net]

> The abstract mentions two 
> kinds of diamond particles found, and I think the terminology is a little 
> more technical than six-sided diamonds.


Hi,

Unfortunately
I don't have time to read these linked articles, but I've seen some
posted references to "hexagonal diamonds," and I'm thinking the
following might help (or maybe not...)

A hexagon is a
2-dimensional figure, which is Greek for "six sides." On the other
hand, a six-faced, equilateral, 3-dimensional solid is--a cube! Take a
look at a cube and count the faces. The crystallographic name for a
cube is a hexahedron. There are cubic diamonds; in fact, former list
member John Betts sells cubic diamond crystals on his website. These
form on earth as well.

I don't know if that helps with the discussion here, but at least it should be a fun fact.

Best,
Don





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