[HN Gopher] A predicted quasicrystal is based on the 'einstein' ...
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A predicted quasicrystal is based on the 'einstein' tile known as
the hat
Author : thunderbong
Score : 41 points
Date : 2024-01-30 09:03 UTC (1 days ago)
(HTM) web link (www.sciencenews.org)
(TXT) w3m dump (www.sciencenews.org)
| WithinReason wrote:
| Related video from Veritasium:
|
| https://www.youtube.com/watch?v=48sCx-wBs34
| dang wrote:
| Related. Others?
|
| _Mathematicians discover shape that can tile a wall and never
| repeat_ - https://news.ycombinator.com/item?id=35273707 - March
| 2023 (156 comments)
| opello wrote:
| https://news.ycombinator.com/item?id=35264965
|
| I think I remember some others but didn't dig for them. Sorry.
| p1mrx wrote:
| > Although the material is entirely theoretical for now [...] For
| example, scientists could manually place molecules on a surface
| in a pattern matching the hat tiling.
|
| Does this even qualify as theoretical? It sounds more like "we
| did geometry and called it physics."
| neovialogistics wrote:
| Crystallography is basically just 3d geometry (with some DE)
| anyway.
| p1mrx wrote:
| The hat tiling is 2D. There are some 2D crystals like
| graphene, but those are interesting because they actually
| exist.
| jacobolus wrote:
| Many bits of physics start out as "did geometry". Will this
| particular idea pan out? Probably not. Should it be the
| subject of popular press at this stage? Probably not. But
| it's worth having scientists explore the possibilities. The
| paper might be interesting to specialists, once published,
| https://journals.aps.org/prl/accepted/33074Yb3Ufa1478fd33b0
| 4...
| pohl wrote:
| Quasicrystals is an excellent example. Penrose tiles were
| invented in 1974, but quasicrystals were discovered in
| 1982.
| peterlada wrote:
| A decade ago I would have agreed with you. But then I
| discovered the topic of five-symmetries and my absolute
| favorite non-toxic non-stick pans are coated with that
| alloy (not long ago deemed impossible) that has the five
| way symmetry.
|
| So the practical applications are not far behind for these
| "only 2D" crystals.
| p1mrx wrote:
| Looks like you're referring to
| https://en.wikipedia.org/wiki/Quasicrystal#Applications,
| marketed as Cybernox.
|
| But 5 to 13 is a huge jump.
|
| https://www.technologyreview.com/2011/10/12/190784/the-
| quasi... says "They closed the production line because
| they had a few problems in the reaction of the coating
| with salt. If people cook with a lot of salt it will etch
| the quasicrystalline coating. People didn't like it, so
| they did not continue."
|
| I see comments about Cybernox from 2001, so the patents
| might've expired by now.
| necubi wrote:
| One of the coolest things about the hat tile is that it was
| discovered by a hobbyist playing with puzzle software. There's a
| great Quanta story about this:
| https://www.quantamagazine.org/hobbyist-finds-maths-elusive-....
| yboris wrote:
| There's a great video explanation too with interviews of people
| behind the scenes:
|
| https://youtu.be/4HHUGnHcDQw?si=APHEQwVxTvcOfC5c&t=382
| m3kw9 wrote:
| Would be an expensive floor tiling project
| floatrock wrote:
| Anyone making hat ceramic tiles? Been thinking about
| remodelling my bathroom...
| opello wrote:
| I think you'd want the spectre to avoid needing reflections.
| zardo wrote:
| > How easy is it to assemble correctly, or, how many ways are
| there to assemble it incorrectly?
|
| The critical question for both creating self assembling
| quasi-crystals, and successfully tiling your bathroom on the
| first try.
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