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

被引：23

作者：

Maksimova, A. A. ^{[1
]}

Oshtrakh, M. I. ^{[1
]}

Chukin, A. V. ^{[1
]}

Felner, I. ^{[2
]}

Yakovlev, G. A. ^{[1
]}

Semionkin, V. A. ^{[1
]}

机构：

[1] Ural Fed Univ, Inst Phys & Technol, Ekaterinburg 620002, Russia

[2] Hebrew Univ Jerusalem, Racah Inst Phys, Jerusalem, Israel

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2018年 / 192卷

关键词：

Northwest Africa 6286 and 7857 ordinary chondrites; Mossbauer spectroscopy; X-ray diffraction; Magnetization measurements; FE-57; MOSSBAUER; TROILITE; METEORITES; MINERALS;

D O I：

10.1016/j.saa.2017.10.056

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

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 Fe-57 Mossbauer 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. Mossbauer 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 Miissbauer spectroscopy. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：275 / 284

页数：10

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