Re:Ongoing compilation table of LK-99 reproduction claims
by Plankaluel on Monday August 07, 2023 @10:24AM
(#37034879)
Yeah, I think unless the authors are deliberatly misleading the public (which is of course a possibility, though not very likely I think) it is hard to imagine a scenario where all of this won't turn out to be highly interesting in one way or another (even if it might turn out to not be a superconductor)
Re:Ongoing compilation table of LK-99 reproduction claims
by harles on Monday August 07, 2023 @10:32AM
(#37034991)
I really doubt there’s intentional fraud here, but they were forced to publish (or pre-print to be pedantic) early. [0] This certainly led to less rigor.
[0]: https://twitter.com/8teAPi/status/1684385895565365248 apologies for the Twitter link, I didn’t have time to find a better source.
Re:Ongoing compilation table of LK-99 reproduction claims
by bestcoder69 on Monday August 07, 2023 @01:24PM
(#37037580)
That Twitter user is making up details and writing a fan-fic: https://twitter.com/8teAPi/status/1686217806298423299?s=20
So you won’t find any other sources, other than other people who have also been misled by @8teAPi.
Frustrating because it’s also chaotic, trying to keep the events straight.
Re:Ongoing compilation table of LK-99 reproduction claims
by xvector on Monday August 07, 2023 @08:53PM
(#37043083)
This is hilarious. I love that @8teAPi did this, hopefully it knocks some sense into people.
Re:Ongoing compilation table of LK-99 reproduction claims
by bschne on Monday August 07, 2023 @10:09AM
(#37034670)
> It's similarly unclear why the material seems to always float at an angle. It seems to track the field lines in some way.
I've seen some people talking about the LK-99 samples only having these properties locally due to internal structure or something like that, could that not explain the angle if one part of the sample had more "pockets" of material with these properties than another part?
Re:Ongoing compilation table of LK-99 reproduction claims
by carabiner on Monday August 07, 2023 @11:12AM
(#37035575)
Do highly diagmagnetic materials have any practical use?
Re:Ongoing compilation table of LK-99 reproduction claims
by sdenton4 on Monday August 07, 2023 @11:20AM
(#37035684)
Frogs provide a wide array of ecosystem services.
Re:Ongoing compilation table of LK-99 reproduction claims
by carabiner on Monday August 07, 2023 @11:34AM
(#37035894)
I eat frogs.
Re:Ongoing compilation table of LK-99 reproduction claims
by kjkjadksj on Monday August 07, 2023 @12:27PM
(#37036655)
Frictionless travel
Re:Ongoing compilation table of LK-99 reproduction claims
by topper-123 on Monday August 07, 2023 @11:30AM
(#37035826)
> If it's not a superconductor, it's the most diamagnetic room temperature material ever seen, by orders of magnitude.
If it’s not a superconductor, can it still be used for e.g. maglev trains?
The most strongly diamagnetic materials that aren't a superconductor are bismuth and pyrolytic carbon, a graphite-like material.
Bismuth has a density of about 10g/cm^3, and a diamagnetic strength (X) of -16.6 x 10^-5. It won't levitate above a magnet because it's just too heavy.
Pyrolytic carbon has a density of 2g/cm^3, and a diamagnetic strength of -40 x 10^-5. Thin sheets of this lightweight material will levitate over strong magnets, provided the magnetic field alternates in a chessboard pattern.
LK-99 must be similar in density to bismuth, and the videos (like below) show large chunks of it levitating. If it's not a superconductor, it's the most diamagnetic room temperature material ever seen, by orders of magnitude.
And on top of that, if pure diamagnetism were at work, the samples would have to slide off the magnet. They wouldn't stay there and float. It's similarly unclear why the material seems to always float at an angle. It seems to track the field lines in some way.
https://www.nytimes.com/2023/08/03/science/lk-99-superconduc...
My background: physics, but not superconductors.