Studies on Al Kidirate and Kapoeta meteorites

A. M. Gismelseed, F. Khangi, A. Ibrahim, A. A. Yousif, M. A. Worthing, A. Rais, M. E. Elzain, C. K. Brooks, H. H. Sutherland

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Mössbauer spectroscopy (20-300 K), magnetic susceptibility measurements (77-350 K), scanning electron microscopy and X-ray diffraction experiments have been performed on two meteorite samples: one from an old fall (Kapoeta) and another from a very recent fall (Al Kidirate). The two specimens differ in their mineralogy. Chondrules appear to be absent in Kapoeta and it is probably a pyroxene-plagioclase achondrite with ferrohypersthene as the most abundant mineral. On the other hand, the Al Kidirate meteorite is an ordinary chondrite and the specimen consists of olivine, orthopyroxene, troilite and kamacite. The Mössbauer measurements confirm the above characterization, showing a paramagnetic doublet for the Kapoeta sample and at least two paramagnetic doublets and magnetic sextets for the Al Kidirate specimens. The former were assigned to Fe in pyroxene sites, while the latter was assigned to Fe in pyroxene, olivine, Fe-S and Fe-Ni alloys. The difference in the mineralogy of the two meteorites has also been reflected in the temperature-dependent magnetic susceptibility. The magnetization and the hyperfine interaction parameters will be discussed in relation to the mineralogy.

Original languageEnglish
Pages (from-to)551-555
Number of pages5
JournalHyperfine Interactions
Volume91
Issue number1
DOIs
Publication statusPublished - Dec 1994

Fingerprint

Meteorites
Mineralogy
mineralogy
meteorites
Olivine
Magnetic susceptibility
olivine
kamacite
achondrites
troilite
magnetic permeability
chondrule
chondrites
plagioclase
Minerals
Magnetization
minerals
Spectroscopy
X ray diffraction
magnetization

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Electronic, Optical and Magnetic Materials

Cite this

Gismelseed, A. M., Khangi, F., Ibrahim, A., Yousif, A. A., Worthing, M. A., Rais, A., ... Sutherland, H. H. (1994). Studies on Al Kidirate and Kapoeta meteorites. Hyperfine Interactions, 91(1), 551-555. https://doi.org/10.1007/BF02064569

Studies on Al Kidirate and Kapoeta meteorites. / Gismelseed, A. M.; Khangi, F.; Ibrahim, A.; Yousif, A. A.; Worthing, M. A.; Rais, A.; Elzain, M. E.; Brooks, C. K.; Sutherland, H. H.

In: Hyperfine Interactions, Vol. 91, No. 1, 12.1994, p. 551-555.

Research output: Contribution to journalArticle

Gismelseed, AM, Khangi, F, Ibrahim, A, Yousif, AA, Worthing, MA, Rais, A, Elzain, ME, Brooks, CK & Sutherland, HH 1994, 'Studies on Al Kidirate and Kapoeta meteorites', Hyperfine Interactions, vol. 91, no. 1, pp. 551-555. https://doi.org/10.1007/BF02064569
Gismelseed AM, Khangi F, Ibrahim A, Yousif AA, Worthing MA, Rais A et al. Studies on Al Kidirate and Kapoeta meteorites. Hyperfine Interactions. 1994 Dec;91(1):551-555. https://doi.org/10.1007/BF02064569
Gismelseed, A. M. ; Khangi, F. ; Ibrahim, A. ; Yousif, A. A. ; Worthing, M. A. ; Rais, A. ; Elzain, M. E. ; Brooks, C. K. ; Sutherland, H. H. / Studies on Al Kidirate and Kapoeta meteorites. In: Hyperfine Interactions. 1994 ; Vol. 91, No. 1. pp. 551-555.
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