Science and techno world topic: Space
Some stars may be orbited by planets diamond. This
possibility opens experiments and calculations of American geoscientists. If
the birth of a star cloud abundant carbon, it can be compressed deep inside of
planets to diamond.
In a sample have been under high pressure and temperature
dark grains of wustite (iron (II) oxide, center) and diamond (right) is formed.
Photo: Ohio State University
Especially with larger planets, this process could come to
fruition, Born Under Cayman explained by the Ohio State University. "It is
conceivable that there are planets with up to 15 Earth masses, half of
diamond," says the researcher. Since diamond is a very good conductor of
heat, but such worlds are likely to cool rapidly and therefore be extremely
inhospitable.
Are deep inside a rocky planet is carbon, therefore, not
only in oxidized form in minerals. Part of it lies rather in plain carbon,
which can be transformed under the weight of several hundred kilometers of rock
into diamond. In addition, a portion of the carbon reacts with iron to form
iron carbide, which sank into the planet core. The oxygen reacts with the iron
and thus forms the iron mineral wustite.
Analogous to the Earth could form apparently also in carbon
planets core and mantle, concludes Wendy Panero, the head of the research
group. "The core would be highly carbonaceous and would thus resemble
steel, while the carbon-rich shell stocks in large part made of diamond."
Because such a planet auskühle quickly, he as probably only temporarily to a
magnetic field, plate tectonics and an atmosphere, the researcher . "We
believe that a diamond planet is a very cold and dark world."
Research: Under Cayman T. Born, Wendy R. Panero and Jason E.
Kabbes, School of Earth Sciences, Ohio State University, Columbus
Presentation at the 2011 Fall Meeting of the American
Geophysical Union, San Francisco; # P21C-1679
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