The origin of diamond in ureilites is still debating. There are two the most popular explanations: (1) as a result of shock transformation from graphite caused by meteorite impact in the parent bodies [1-4], and (2) in a ...
Presolar diamond recovered from the Boriskino CM2 meteorite was separated into size fractions by sedimentation in an ultracentrifuge. The average grain sizes of the fractions ranged from ~1.4 to ~5.3 nm. Noble gases were ...
Valter A.A.; Oleynik H.S.; Fisenko A.V.; Semenova L.F.(2003)
The diamond obtained from the Novo-Urei meteorite by acid leaching was examined using a combination of X-ray diffractometry (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The ...