HRTEM images of Permian coal samples collected from the Yongan Coalfield show onion-like carbon structures with single (a–c) or multiple (d–f) cores at their center. (IMAGE)

Science China Press

HRTEM images of Permian coal samples collected from the Yongan Coalfield show onion-like carbon structures with single (a–c) or multiple (d–f) cores at their center.

Caption

single-core natural carbon onions (Fig. a–c); multi-core natural carbon onions (Fig. d–f).

Credit

©Science China Press

Usage Restrictions

Use with credit.

License

Original content

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.