Interstellar diamonds in meteorites

Lewis, R. S.; Tang, Ming; Wacker, J. F.; Anders, Edward; Steel, Eric B.

doi:10.1038/326160a0

Cited by 684 publications

(399 citation statements)

References 20 publications

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“…A number of impurities have been identified in the meteoritic diamonds, including noble gases (He, Ne, Ar, Kr, and Xe), Ba and Sr (which are slightly enriched in r-process isotopes; Lewis et al 1991), H with 1 H/ 2 D = 5193 (Virag et al 1989; ( 1 H/ 2 D) terrestrial = 6667), N with 14 N/ 15 N = 406 (Russell et al 1991;( 14 N/ 15 N) terrestrial = 272). The 12 C/ 13 C ratio is only slightly higher than the terrestrial one (92 compared to 89; Lewis et al 1987).…”

Section: Properties Of the Meteoritic Nano-diamondsmentioning

confidence: 90%

Optical data of meteoritic nano-diamonds from far-ultraviolet to far-infrared wavelengths

Mutschke

Andersen

Jäger

et al. 2004

A&A

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Abstract.We have used different spectroscopic techniques to obtain a consistent quantitative absorption spectrum of a sample of meteoritic nano-diamonds in the wavelength range from the vacuum ultraviolet (0.12 µm) to the far infrared (100 µm). The nano-diamonds have been isolated by a chemical treatment from the Allende meteorite (Braatz et al. 2000, Meteorit. Planet. Sci., 35, 75). Electron energy loss spectroscopy (EELS) extends the optical measurements to higher energies and allows the derivation of the optical constants (n & k) by Kramers-Kronig analysis. The results can be used to restrain observations and to improve current models of the environment where the nano-diamonds are expected to have formed. We also show that the amount of nano-diamond which can be present in space is higher than previously estimated by Lewis et al. (1989, Nature, 339, 117).

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Section: Properties Of the Meteoritic Nano-diamondsmentioning

confidence: 90%

Optical data of meteoritic nano-diamonds from far-ultraviolet to far-infrared wavelengths

Mutschke

Andersen

Jäger

et al. 2004

A&A

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“…The first mineral type of presolar grains, diamond, was identified and isolated in 1987 [1]. The mineral types of presolar grains identified to date include diamond [1], SiC [2,3], graphite [4], oxides [5][6][7], Si 3 N 4 [8], silicates [9][10][11][12], and refractory carbides inside graphite or SiC host grains [13]. Their abundances range from a few hundred ppm to down to a few ppb [14,15].…”

Section: Introductionmentioning

confidence: 99%

Nucleosynthetic Signatures in Presolar SiC and Graphite Grains

Amari¹

2017

Proceedings of the 14th International Symposium on Nuclei in the Cosmos (NIC2016)

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Presolar SiC and graphite grains are the grain types whose isotopic signatures have been extensively studied. Isotopic compositions of light and intermediate elements in single grains have been analyzed mostly using secondary ion mass spectrometry. Detailed information about nucleosynthetic conditions can be obtained from isotopic compositions of heavy elements. Isotopic compositions of heavy elements in SiC and graphite grains have been analyzed using resonant ionization mass spectrometry. Analyses of heavy elements and noble gases are likely to produce new insights into presolar grains using newly-developed instruments.

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“…[50] However, it was subsequently found that these gases were actually contained in nanodiamonds. [51] Nevertheless, precisely because the nanodiamonds and the later discovered graphite and silicon carbide grains in meteorites are interstellar, it seemed logical to search for possibly interstellar fullerenes in meteorites also.…”

Section: Meteorites and Interplanetary Dust Particlesmentioning

confidence: 99%

Terrestrial and Extraterrestrial Fullerenes

Heymann

Jenneskens

Jehlička

et al. 2003

Fullerenes, Nanotubes and Carbon Nanostructures

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This paper reviews reports of occurrences of fullerenes in circumstellar media, interstellar media, meteorites, interplanetary dust particles (IDPs), lunar rocks, hard terrestrial rocks from Shunga (Russia), Sudbury (Canada) and Mitov (Czech Republic), coal, terrestrial sediments from the Cretaceous-Tertiary-Boundary and Permian-Triassic-Boundary, fulgurite, ink sticks, dinosaur eggs, and a tree char. The occurrences are discussed in the context of known and postulated processes of fullerene formation, including the suggestion that some natural fullerenes might have formed from biological (algal) remains.

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Interstellar diamonds in meteorites

Cited by 684 publications

References 20 publications

Optical data of meteoritic nano-diamonds from far-ultraviolet to far-infrared wavelengths

Optical data of meteoritic nano-diamonds from far-ultraviolet to far-infrared wavelengths

Nucleosynthetic Signatures in Presolar SiC and Graphite Grains

Terrestrial and Extraterrestrial Fullerenes

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