On 2/16/2021 11:47 AM, Gerlind Sulzenbacher wrote:
Dear all,
I wonder whether any of you have ever encountered such strange crystals.
In the images you can download via the link below, crystal1 looks
hollow, crystal2 looks like a cubic crystal embedded within a hexagonal
arragement.
I don't know the cause of the overall appearance that your cubic
crystals are embedded within larger cubic objects. I do know that the
projection of a cube, down its three-fold axis, to a plane will create a
hexagon. I think that is the case in your second photo. The six-fold
symmetry is actually the result of a special view of the same cubes you
are seeing elsewhere.
Dale Tronrud
https://filesender.renater.fr/?s=download&token=71d70da4-5ea2-4cf3-ae5f-5d89545574ce
May be all this is just an optical Fata Morgana.
We are waiting for our next synchrotron beam time to see whether, and
what kind of diffraction they could provide.
In the meanwhile, I leave you with the beauty and may be somebody want's
to comment.
with best wishes,
Gerlind
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