Вторник, 23 Октября, 2018


Scientists find cosmic ice on Earth

Image Barcroft Media via Getty Images Image Barcroft Media via Getty Images
Kristine Garrett | 11 Марта, 2018, 21:05

Rarer still, these diamonds make their way up through the mantle and crust to Earth's surface, with the water trapped inside is exposed to temperatures low enough to allow the formation of ice-VII.

Researchers first discovered on Earth the ice-VII.

Diamonds can form up to 400 miles beneath the Earth's surface, but materials trapped within them don't always survive up to the surface.

After scanning the diamond with an x-ray, the University of Nevada scientists realized that they had found ice-vii, for the first time ever in naturally occurring form. Ice-VII has been compressed, with oxygen atoms in a cubic structure as opposed to the hexagonal structure of Ice-I. This newly discovered water ice form is also approximately one-and-a-half times denser than conventional ice while differing from other phases of ice due to its ability to withstand increasing pressure and remain "fairly stable" under such conditions. They had, however, speculated that it might be common in other icy parts of the solar system, including Saturn's moons Enceladus and Titan and Jupiter's moon Europa. The pressure in the mantle is intense, causing diamonds to form from carbon. In extremely rare cases, when the diamonds travel through it closer to the surface, they retain their lattice structure and the water inside them is exposed to sufficiently low temperatures, it has formed ice-VII.

"They crack and whatever inclusions they had in them are lost". Thanks to the find, ice-VII has now officially been recognized as a mineral by the International Mineralogical Association.

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