. 2015 Feb 19;10:78. doi: 10.1186/s11671-015-0767-9
© Krasnovyd et al.; licensee Springer. 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
Figure 1.
The surface of the shungite sample Sh-II-1.