Characterization of Northwest Africa 6286 and 7857 ordinary chondrites using X-ray diffraction, magnetization measurements and Mössbauer spectroscopy

A. A. Maksimova, M. I. Oshtrakh*, A. V. Chukin, I. Felner, G. A. Yakovlev, V. A. Semionkin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Northwest Africa (NWA) 6286 and 7857 meteorites were studied in detail by using optical microscopy, scanning electron microscopy with energy dispersion spectroscopy, X-ray diffraction, magnetization measurements and 57Fe Mössbauer spectroscopy with a high velocity resolution. The main and the minor iron-bearing phases were identified in both meteorites. The unit cell parameters as well as Fe2+ and Mg2+ cation distribution were determined for the M1 and M2 sites in silicate microcrystals. Saturation magnetic moments were obtained for both meteorites. Mössbauer parameters for the main and the minor iron-bearing microcrystals were estimated and compared for NWA 6286 and NWA 7857 LL6 ordinary chondrites. The Fe2+ and Mg2+ cation partitioning, distribution coefficient and temperature of cation equilibrium distribution were estimated for silicate microcrystals using X-ray diffraction and Mössbauer spectroscopy.

Original languageEnglish
Pages (from-to)275-284
Number of pages10
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume192
DOIs
StatePublished - 5 Mar 2018

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

  • Magnetization measurements
  • Mössbauer spectroscopy
  • Northwest Africa 6286 and 7857 ordinary chondrites
  • X-ray diffraction

Fingerprint

Dive into the research topics of 'Characterization of Northwest Africa 6286 and 7857 ordinary chondrites using X-ray diffraction, magnetization measurements and Mössbauer spectroscopy'. Together they form a unique fingerprint.

Cite this