Poorly graphitized carbon as a new cosmothermometer for primitive extraterrestrial materials

Details Poorly graphitized carbon as a new cosmothermometer for primitive extraterrestrial materials Poorly graphitized carbon as a new cosmothermometer for primitive extraterrestrial materials

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.315..733r&link_type=abstract

Nature (ISSN 0028-0836), vol. 315, June 27, 1985, p. 733-736.

Computer Science

33

Carbon, Cosmochemistry, Extraterrestrial Matter, Graphite, Meteoritic Composition, Cosmic Dust, Cosmology, Geochemistry, Low Temperature, Solar System, Temperature Effects, Samples, Extraterrestrial, Graphite, Carbon, Geochemistry, Solar System, Stratosphere, Phases, Thermal Effects, Cosmic Dust, Interplanetary Dust, Comparisons, Temperature, Electron Microscopy, Analysis, Data

Scientific paper

A description is presented for the most common carbon phase in carbon-rich chondritic porous (CP) aggregate collected from the stratosphere by NASA researchers as part of the Cosmic Dust Program. An extraterrestrial origin was confirmed for the samples by microscopic examinations. The sample grains contained 45 percent carbon-rich phases and 30 percent low-temperature phases. Studies of the d002 interlayer spacing of the carbon clumps indicated that graphitization occurred at metamorphic temperatures after solar nebular condensation, yet early in solar system formation. Graphitized terrestrial materials served as a useful reference against which the CP materials were compared.

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