Sentences with word «ureilite»

The meteorites belong to a class called ureilites, which have compositions different from those in any of the known stony planets in the solar system.

The Almahata Sitta meteorites, a few hundred rock fragments that rained down on Sudan's Nubian Desert in 2008, included a number of coarse - grained, carbon - rich fragments known as ureilites.

The Almahata Sitta meteorites are mostly ureilites, a rare type of stony meteorite that often contains clusters of nano - sized diamonds.

The unanswered question, so far, has been the planetary origin of 2008 TC3 ureilites.

A large planetary body inferred from diamond inclusions in a ureilite meteorite.

These ureilites contain 100 - micrometer diamonds — too large to have been formed in the shock of two asteroids colliding.

Because this meteorite has high concentrations of carbon manifested as diamond and graphite, Almahata Sitta is a type of meteorite called a ureilite.

In the new study, lead author Farhang Nabiei, a materials scientist at École Polytechnique Fédérale de Lausanne, in Switzerland, and colleagues detailed what they found upon analyzing the inclusions inside the ureilite diamonds.

The authors write «This study provides convincing evidence that the ureilite parent body was one such large «lost» planet before it was destroyed by collisions some 4.5 billion years ago.»