Occurrence of natural fullerenes in low grade metamorphosed proterozoic shungite from Karelia, Russia
We report on the occurrence of fullerenes in Proterozoic shungite (˜2 Ga) from the shungite mine, Kondopoga, Karelia, Russia (62.12°N 34.17°E). The presence of fullerenes has been confirmed by mass spectrometry, with peaks at 360 and 720 amu (atomic mass unit), powder X-ray diffraction showing ten d...
| Main Authors: | , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | unknown |
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Elsevier Science
1998
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| Subjects: | |
| Online Access: | http://repository.ias.ac.in/55028/ http://www.sciencedirect.com/science/article/pii/S0016703798002427 |
| Summary: | We report on the occurrence of fullerenes in Proterozoic shungite (˜2 Ga) from the shungite mine, Kondopoga, Karelia, Russia (62.12°N 34.17°E). The presence of fullerenes has been confirmed by mass spectrometry, with peaks at 360 and 720 amu (atomic mass unit), powder X-ray diffraction showing ten diffraction peaks corresponding to the fullerite structure with a = 1.4201(5) nm, and 13 C nuclear magnetic resonance (NMR) spectroscopic studies, showing a peak at 143.2 ppm. In the Kondopoga shungite mine, fullerenes occur in silty shales that have experienced greenshist facies metamorphism. |
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