[url]http://www.sciencedaily.com/releases/2013/05/130520095404.htm[/url]
[QUOTE][B]Researchers have used a diamond anvil cell to squeeze iron at pressures as high as 3 million times that felt at sea level to recreate conditions at the center of Earth. The findings could refine theories of how the planet and its core evolved.[/B]
Through laboratory experiments, postdoctoral researcher Arianna Gleason, left, and Wendy Mao, an assistant professor of geological and environmental sciences and of photon science, determined that the iron in Earth's inner core is about 40 percent as strong as previously believed.
The massive ball of iron sitting at the center of Earth is not quite as "rock-solid" as has been thought, say two Stanford mineral physicists. By conducting experiments that simulate the immense pressures deep in the planet's interior, the researchers determined that iron in Earth's inner core is only about 40 percent as strong as previous studies estimated.
This is the first time scientists have been able to experimentally measure the effect of such intense pressure -- as high as 3 million times the pressure Earth's atmosphere exerts at sea level -- in a laboratory. A paper presenting the results of their study is available online in Nature Geoscience.
"The strength of iron under these extreme pressures is startlingly weak," said Arianna Gleason, a postdoctoral researcher in the department of Geological and Environmental Sciences, and lead author of the paper. Wendy Mao, an assistant professor in the department, is the co-author.
"This strength measurement can help us understand how the core deforms over long time scales, which influences how we think about Earth's evolution and planetary evolution in general," Gleason said.
Until now, almost all of what is known about Earth's inner core came from studies tracking seismic waves as they travel from the surface of the planet through the interior. Those studies have shown that the travel time through the inner core isn't the same in every direction, indicating that the inner core itself is not uniform. Over time and subjected to great pressure, the core has developed a sort of fabric as grains of iron elongate and align lengthwise in parallel formations.[/QUOTE]
That's an interesting property of iron.
"strength"
"weak"
"40% as strong"
I thought this is supposed to be a scientific article?
[editline]20th May 2013[/editline]
Extrapolated to core temperatures, ha!
You won't fool me!
[QUOTE=Killuah;40713564]"strength"
"weak"
"40% as strong"
I thought this is supposed to be a scientific article?
[editline]20th May 2013[/editline]
Extrapolated to core temperatures, ha!
You won't fool me![/QUOTE]
At first I thought they actually meant strong as in thick in relation to the rest.
Seriously this isn't well written at all.
Seriously this is pretty nice but probably not really representative, temperature-pressure relations go wild in the deeper parts of the Earth.
[editline]20th May 2013[/editline]
It's shear module. Gotta go 2 sources deeper.
for a second i thought my life was going to become this
[img]http://www.impawards.com/2003/posters/core.jpg[/img]
It doesn't make sense. Did they measure shear module under those pressures? Did they cool it down?
Because my universities pressure chamber needs to cool down samples to below ~130°C so we don't kill the piezoelectric elements and we can go to 200 MPa, much bigger(and thus more representative) samples too.
Wish I could read the full article.
Further reading for anyone interested:
[url]http://en.wikipedia.org/wiki/Allotropes_of_iron[/url]
[img]http://dao.mit.edu/8.231/PurePhases_files/img23.gif[/img]
Earth better start pumping a lot of iron if he wants to stand up to those mean gas giants
Fuck, are we gonna end up like krypton?
Lets get one of our babies from kansas, put him in a rocket, and fire him into space.
Scientists previously held the belief that the earths core was strong as fuck.
This claim has been refuted and scientists now believe the core to be strong as shit.
Why the friendlies? It's not like we're gonna perish or something, the core has been like that all the time, look how well we're doing.
Just don't tell the sun about it.
[QUOTE=Kfacat;40714026]Earth better start pumping a lot of iron if he wants to stand up to those mean gas giants[/QUOTE]
They're just big fat boys. Earth's the one that's lean and built
[QUOTE=Kfacat;40714026]Earth better start pumping a lot of iron if he wants to stand up to those mean gas giants[/QUOTE]
Jupiter: "Do you even lift?"
[quote](For this study, Gleason mathematically extrapolated from their pressure data to factor in the effect of temperature.)[/quote]
A.k.a. they don't know.
The experiment was for room-temperature high-pressure and is not in the slightest representative of the mechanical properties of iron at core temperatures, because that would be an entirely different phase.
[QUOTE=Angus725;40713834]Further reading for anyone interested:
[url]http://en.wikipedia.org/wiki/Allotropes_of_iron[/url]
[img]http://dao.mit.edu/8.231/PurePhases_files/img23.gif[/img][/QUOTE]
Something about this all reminds me of the "Triple Point" of water.
[QUOTE=LoneWolf_Recon;40719362]Something about this all reminds me of the "Triple Point" of water.[/QUOTE]
Surprise surprise that's not something unique to water. All substances have one triple point.
Soooo, that means we are going to die or not ?
[QUOTE=Fleskhjerta;40730087]Soooo, that means we are going to die or not ?[/QUOTE]
You are dying right now~
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