So wil it be stable.... metallic hydrogen?

So wil it be stable.... metallic hydrogen?

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Pupp

Original Poster:

12,357 posts

279 months

RobDickinson

31,343 posts

261 months

Friday 27th January 2017
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sure, at insane pressures and near zero temps...

Simpo Two

87,092 posts

272 months

Saturday 28th January 2017
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You'd think a physicist would know that if you need 71.7 million psi and absolute zero to change the state of an element, it ain't gonna stay like it if you put it at STP.

Spend the time/money on nuclear fusion.

Beati Dogu

9,194 posts

146 months

Saturday 28th January 2017
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That's another bottomless tar pit. Spend it on thorium fission.

AW111

9,674 posts

140 months

Saturday 28th January 2017
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Simpo Two said:
You'd think a physicist would know that if you need 71.7 million psi and absolute zero to change the state of an element, it ain't gonna stay like it if you put it at STP.

Spend the time/money on nuclear fusion.
It's unlikely, but diamond is pretty stable, despite the pressure required to form it.

Simpo Two

87,092 posts

272 months

Saturday 28th January 2017
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AW111 said:
It's unlikely, but diamond is pretty stable, despite the pressure required to form it.
Interesting analogy; though what works for one element can be very different to what works for another.

'A key question is whether the pressurised hydrogen maintains its metallic properties at room temperature, which would make it extremely useful as a superconductor.'


idea They could put it at room temperature and see...

Look forward to collecting my Nobel Prize.!

Moonhawk

10,730 posts

226 months

Saturday 28th January 2017
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AW111 said:
It's unlikely, but diamond is pretty stable, despite the pressure required to form it.
Diamond is stable after formation because of the covalent bonds that are formed.

Metallic hydrogen would not have any covalent bonding.

annodomini2

6,914 posts

258 months

Monday 30th January 2017
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Some theorise it could be meta-stable and retain the form, until it's verified that we actually have metallic hydrogen it will remain to be seen.

RizzoTheRat

26,018 posts

199 months

Monday 30th January 2017
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Simpo Two said:
Spend the time/money on nuclear fusion.
Sadly it doesn't look like that will happen as we're pulling out of Eurotom, which probably means the end of JET.

Morningside

24,114 posts

236 months

Monday 30th January 2017
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Without wading through everything how much actual metal have they produced at the cost of what input required?

ATG

21,369 posts

279 months

Monday 30th January 2017
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Moonhawk said:
AW111 said:
It's unlikely, but diamond is pretty stable, despite the pressure required to form it.
Diamond is stable after formation because of the covalent bonds that are formed.

Metallic hydrogen would not have any covalent bonding.
Uhm ... obviously? If the binding was covalent, it wouldn't be metallic. But clearly you don't need covalent bonds to be a stable solid ... because plenty of metals are stable at room temperature and atmospheric pressure.

For all those lining up to say "it couldn't be stable", a big career in Physics beckons if you can explain why not. Because there are plausible theoretical reasons to suggest that it might be.

But let's not get ahead of ourselves. An awful lot of people who work in the field are saying the Harvard team's claims are implausible and that their paper shouldn't have been published.

P.s. I've just read the article in the OP. The reporting is "a bit naive", if we're being generous, in the light of what had been reported elsewhere.

Edited by ATG on Monday 30th January 14:47

andy_s

19,607 posts

266 months

Monday 30th January 2017
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It's got 'sexed up dossier' written all over it...

Einion Yrth

19,575 posts

251 months

Tuesday 31st January 2017
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Will metallic hydrogen be stable at STP? My money's on "no", but I'd be more than happy to be wrong.

Moonhawk

10,730 posts

226 months

Tuesday 31st January 2017
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ATG said:
Uhm ... obviously? If the binding was covalent, it wouldn't be metallic. But clearly you don't need covalent bonds to be a stable solid ... because plenty of metals are stable at room temperature and atmospheric pressure.

For all those lining up to say "it couldn't be stable", a big career in Physics beckons if you can explain why not. Because there are plausible theoretical reasons to suggest that it might be.

But let's not get ahead of ourselves. An awful lot of people who work in the field are saying the Harvard team's claims are implausible and that their paper shouldn't have been published.

P.s. I've just read the article in the OP. The reporting is "a bit naive", if we're being generous, in the light of what had been reported elsewhere.

Edited by ATG on Monday 30th January 14:47
I didn't say it wouldn't be stable - I was merely pointing out that the analogy being drawn (using diamond being formed at high pressure and being stable as a point of comparison) wasn't really valid due to the different bonding in diamond and metals.



Edited by Moonhawk on Tuesday 31st January 21:00