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      Self-assembled nanocrystals discovered in Chelyabinsk meteorite

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          Abstract

          Current interest in nanomaterials is focused mostly on artificial materials fabricated for various applications. However, naturally occurring nanocrystal arrays, like those recently found in the meteorite that fell near Chelyabinsk in Russia on 15 February, 2013, can provide some new insights into the nature of nanomaterials, including the conditions for their natural occurrence. Here we report the results of our spectroscopic investigation of a fragment of the Chelyabinsk meteorite. The atomic structure of a fragment of the Chelyabinsk meteorite was studied using high-resolution transmission electron microscopy. Elemental and phase analysis of the object that was carried out by energy dispersive X-ray spectroscopy and electron diffraction revealed the presence of crystalline phases of different chemical compounds specific to meteorites of the LL group. In addition to single-crystal inclusions, extensive areas with ferropericlase nanocrystals having characteristic sizes from 3 to 15 nm were found in the structure of the meteorite. The study of the meteorite employing combination scattering of light (Raman) and photoluminescence spectroscopy methods has revealed quantum effects of ferropericlase nanoparticles and related photoluminescence with a maximum in the range of 675–800 nm.

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          Chondritic meteorites

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            The crystal structures and the cation distributions of Mg and Fe of natural olivines

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              Physical mechanism of Chelyabinsk superbolide explosion

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                Author and article information

                Journal
                Sci Rep
                Sci Rep
                Scientific Reports
                Nature Publishing Group
                2045-2322
                05 March 2014
                2014
                : 4
                Affiliations
                [1 ]Department of Semiconductor Physics and Optoelectronics, Faculty of Physics, Lobachevsky State University of Nizhni Novgorod , Prospekt Gagarina 23, Nizhni Novgorod 603950, Russia
                Author notes
                Article
                srep04280
                10.1038/srep04280
                5394681
                24594587
                Copyright © 2014, Macmillan Publishers Limited. All rights reserved

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/

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