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#9434 - 10/05/06 05:23 PM 'Metallic Water' Alters Characteristics Of Neptune
DA Morgan Offline
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Registered: 10/17/04
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Supercomputer simulations by two Sandia researchers have significantly altered the theoretical diagram universally used by scientists to understand the characteristics of water at extreme temperatures and pressures.

The new computational model also expands the known range of water?s electrical conductivity.

The Sandia theoretical work showed that phase boundaries for ?metallic water? ? water with its electrons able to migrate like a metal?s ? should be lowered from 7,000 to 4,000 kelvin and from 250 to 100 gigapascals.

(A phase boundary describes conditions at which materials change state ? think water changing to steam or ice, or in the present instance, water ? in its pure state an electrical insulator ? becoming a conductor.)

For more:
http://www.sciencedaily.com/releases/2006/10/061004180104.htm
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#9435 - 10/20/06 10:14 PM Re: 'Metallic Water' Alters Characteristics Of Neptune
Carli Offline
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Registered: 08/30/06
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Loc: Texas
sweet
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#9436 - 10/21/06 03:21 AM Re: 'Metallic Water' Alters Characteristics Of Neptune
anyman Offline
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Registered: 12/18/04
Posts: 134
nice find; thanx dano

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#9437 - 10/22/06 01:03 AM Re: 'Metallic Water' Alters Characteristics Of Neptune
Pragmatist Offline
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Registered: 03/10/06
Posts: 84
Loc: N.W. U.S.
Since we're talking about neptune wouldn't we
be looking at polymorphic ice???
I remember a bit about this, (eight or more forms?),
but had trouble finding it.
Came up with this though:
http://cat.inist.fr/?aModele=afficheN&cpsidt=1096194

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#9438 - 10/22/06 04:05 AM Re: 'Metallic Water' Alters Characteristics Of Neptune
DA Morgan Offline
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Registered: 10/17/04
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Loc: Seattle, WA
Depends on the pressure. And Neptune is big enough that the density will cover a large range of values.
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#9439 - 10/22/06 04:12 AM Re: 'Metallic Water' Alters Characteristics Of Neptune
samwik Offline
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Loc: Colorado
The article mentions that the pressures found on Neptune do fall within the newly calculated phase limits. It sounds like they didn't before. ~samwik
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#9440 - 10/22/06 05:10 AM Re: 'Metallic Water' Alters Characteristics Of Neptune
DA Morgan Offline
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Registered: 10/17/04
Posts: 4136
Loc: Seattle, WA
That is my understanding.

Refined calculations changed the range of pressures believed to exist within the planet.
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