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Synthesis of low density carbon crystal “carbolite” by quenching of carbon gas

Published online by Cambridge University Press:  03 March 2011

Sei-ichi Tanuma  and
Andrei Palnichenko
Sei-ichi Tanuma
Affiliation:
Department of Materials Science, Iwaki Meisei University, Iwaki Fukushima 970, Japan
Andrei Palnichenko*
Affiliation:
Department of Materials Science, Iwaki Meisei University, Iwaki Fukushima 970, Japan
*
a)On leave from the Institute of Solid State Physics. Academy of Sciences of Russia, 142432, Moscow District, Chernogolovka, Russia.
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Abstract

A new carbon crystal named carbolite has been synthesized by quenching high temperature carbon gas on a room temperature substrate. The crystal has a density as small as 1.46 g/cm3 and is transparent for visible light. The crystal structure is hexagonal, and the dimensions of the unit cell are 1.193 nm in the α-direction and 1.062 nm in the c-direction. Along the c-axis, a parallel array of carbon chains is proposed. The array is made up of a triangular lattice in which the interchain distance is 0.344 nm and the mean interatomic distance within a carbon chain is 0.133 nm. The former value is close to the van der Waals distance between the honeycomb planes of graphite, and the latter value is close to the C-C bond length in the honeycomb plane. Intercalations of potassium, sodium, and iodine atoms are performed.

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Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 5 , May 1995 , pp. 1120 - 1125
Copyright
Copyright © Materials Research Society 1995

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References

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