Anybody out there know how to describe a tetradecahedral grain?
or have a picture handy?
I can't seem to find one.
Ray
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Anybody out there know how to describe a tetradecahedral grain?
or have a picture handy?
I can't seem to find one.
Ray
Anybody out there know how to describe a tetradecahedral grain? :confused:
or have a picture handy?
I can't seem to find either.
Ray
This is the closest I can get. You be the judge.
OTOH, if it is doable, why don't you make one? :D Then you can show us the pix.
PE
Groobled it.
PE's 14 sided crystals are prettier than mine, though.
:(
After thinking about my own question, I think I came up with an answer.
I will give it a try anyway.
Octahedral grain can be derived from tetradecahedral grain by continued ripening....
The grain in your picture were supposed to be octahedra...
but had there portrait taken before they were completely mature.
They were "toddlers"!
Did you try Googleing "photos of a tetradecahedron grain"? I think I saw a drawing of one once but I cant remember where. I think it was a patent for a silver halide grain for photography held by a japanese fellow. Hope that helped.
Rick
Octahedra = 8 sided, Tetra deca hedra = 4 10 sided. An octahedron in emulsion parlance in the case above is a cube with clipped corners. A cube has 6 faces and 8 corners. If you look closely at my photomicrograph, you see that each side has 6 edges but there are 8 + 6 sides making 14. Go figure!
There are several possible shapes possible. AFAIK, there is nothing "golden" or special about them.
PE