A New Allotropic Form of Carbon from the Ries Crater

@article{Goresy1968ANA,
  title={A New Allotropic Form of Carbon from the Ries Crater},
  author={Ahmed El Goresy and Guy Donnay},
  journal={Science},
  year={1968},
  volume={161},
  pages={363 - 364}
}
A new allotropic form of carbon occurs in shock-fused graphite gneisses in the Ries Crater, Bavaria. The assemblage in which it occurs consists of hexagonal graphite, rutile, pseudobrookite, magnetite, nickeliferous pyrrhotite, and baddeleyite. Electron-probe analyses indicate that the new phase is pure carbon. It is opaque and much more strongly reflecting than hexagonal graphite. Measurement of x-ray diffraction powder patterns leads to cell dimensions a = 8.948 � 0.009, c = 14.078 � 0.017… 

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