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Opal-like crystals found for first time in meteorite

Washington , Thu, 04 Aug 2011 ANI

Washington, Aug 4 (ANI): Scientists have for the first time discovered opal-like crystals in the Tagish Lake meteorite, which fell to Earth in Canada in 2000.


The crystals may have formed in the primordial cloud of dust that produced the sun and planets of our solar system 4.6 billion years ago.


Katsuo Tsukamoto and colleagues say that colloidal crystals such as opals, which form as an orderly array of particles, are of great interest for their potential use in new electronics and optical devices.


Surprisingly, the crystals in the meteorite are composed of magnetite, which scientists thought could not assemble into such a crystal because magnetic attractions might pack the atoms together too tightly.


"We believe that, if synthesized, magnetite colloidal crystals have promising potential as a novel functional material," the article said.


The formation of colloidal crystals in the meteorite implies that several conditions must have existed when they formed.


"First, a certain amount of solution water must have been present in the meteorite to disperse the colloidal particles," it explained.


"The solution water must have been confined in small voids, in which colloidal crystallization takes place.


"These conditions, along with evidence from similar meteorites, suggest that the crystals may have formed 4.6 billion years ago," it stated.


The study has been reported in the Journal of the American Chemical Society. (ANI)


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