The results show that nano- and microdiamonds coexist with nanographite aggregates. In this work, we present X-ray diffraction and micro-Raman spectroscopy analyses performed on diamond and graphite occurring in the ureilite Yamato 74123 (Y-74123). For this purpose, the characterization of carbon phases can provide further information on diamond and graphite formation in ureilites, shedding light on the origin and history of this meteorite group.
The formation and shock history of ureilite meteorites, a relatively abundant type of primitive achondrites, has been debated for decades.
