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shungite

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shungite [′shəŋ‚īt]
(geology)
A hard, black, amorphous, coallike material composed of more than 98% carbon.


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Fine Shungite powders--advanced fillers of polyfunctional action for elastomer composites," B.
Buseck and his collegues at Arizona State University in Tempe identified the first naturally occurring fullerenes in a rock from Russia called shungite (SN: 7/11/92, p.
Using high-resolution transmission electron microscopy, Tsipursky first noted that some shungite images contained the same array of white circles and black centers that characterized micrographs of synthetic fullerene samples.
 
 
 
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