* Astronomy

Blobrana · L

RE: Novo-Urei meteorite

Blobrana · L

Title: The Novo Urei meteorite
Authors: Ringwood, A. E.

The occurrence of diamond in Novo Urei has been confirmed by X-ray diffraction. Chemical and mineralogical studies of this meteorite suggest that it is an intensely metamorphosed chondrite.

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Blobrana · L

Title: Diamonds in Ureilites
Authors: Tomasz Jakubowski, Anna Karczemska, Marcin Kozanecki

The presence of diamonds have been confirmed in different types of meteorites: carbonaceous chondrites, ureilites, and iron meteorites. Meteoritic diamonds are of particular interest for research as they exist in different polytypes (3C, 2H, 6H, 8H, 10H, 21R) (Phelps, 1999a), have different sizes (from nanometers up to millimeters), and are of different origin. As nanodiamonds contain isotopic anomalies, they are believed to have formed before our solar system and are thus called presolar. Phelps (1999b) underlines that the theories of meteoritic diamond genesis have been evolving in accordance with the development in diamond synthesis.