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Beryl crystal structure (a.k.a. FCS nightmare) [message #82214] Sun, 29 December 2013 18:42 UTC Go to next message
avatar mkroeker  is currently offline mkroeker
Messages: 1719
Registered: June 2012
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This probably caused some headaches at shapeways, although it came out very nice in the end. I have not yet mustered the courage to inquire about the number of reprints necessary to achieve this, but I doubt that it was straightforward even though I made the connecting spheres bigger than I would have liked...
http://ruby.chemie.uni-freiburg.de/~martin/shapeways/beryll.jpg
The model shows a section of the crystal structure of the mineral beryl (named aquamarine or emerald as a gemstone) in the polyhedral representation commonly used in solid state chemistry where ball-and-stick models would quickly become too confusing. (The red tetrahedra each contain a silicon atom in the center, while there is an aluminum atom inside the blue octahedra and beryllium in the green polyhedra. All vertices are occupied by oxygen atoms - the red spheres.)
http://ruby.chemie.uni-freiburg.de/~martin/shapeways/beryll2.jpg
I have left off the oxygens on the outside of the model as they would have added more weight to the more or less free-standing polyhedra and would have had a high probability of breaking off or crumbling away themselves - hopefully recent developments like the ProJet4500 will make printing similar models easier in the near future.

[Updated on: Sun, 29 December 2013 18:43 UTC]

Re: Beryl crystal structure (a.k.a. FCS nightmare) [message #82224 is a reply to message #82214 ] Mon, 30 December 2013 01:44 UTC Go to previous messageGo to next message
avatar EricHo  is currently offline EricHo
Messages: 157
Registered: November 2013
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This is geometrically mesmerizing on the eyes. Very cool!


Social Media Specialist | Shapeways
Re: Beryl crystal structure (a.k.a. FCS nightmare) [message #82229 is a reply to message #82224 ] Mon, 30 December 2013 07:44 UTC Go to previous messageGo to next message
avatar MitchellJetten  is currently offline MitchellJetten
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Registered: June 2011
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Looks awesome!

Quote:

I have not yet mustered the courage to inquire about the number of reprints necessary to achieve this

I see this in the delta 3 times:

"Reprint as 853685B at SPE Reason: Broken Cleaning"

4th time it was fine :D


Kind regards,

Mitchell Jetten
Customer Service Coordinator
Shapeways
Re: Beryl crystal structure (a.k.a. FCS nightmare) [message #82327 is a reply to message #82229 ] Tue, 31 December 2013 17:53 UTC Go to previous message
avatar mkroeker  is currently offline mkroeker
Messages: 1719
Registered: June 2012
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Thank you for the feedback. Obviously I had not truely appreciated the "evil" sandcastle rule and the somewhat unexpected fragility of "raw" FCS prints before I tried this. And rest assured that I will not try to offer it for sale here, or otherwise try to bankrupt shapeways through repeat orders of it. :-)
Now if there was a multicolor material that did not require this diligent post-processing that seems diametrical to high-throughput printing...

 
   
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