Natural linear dichroism in pyrite (FeS2):: experiments and calculations

被引：13

作者：

Cabaret, D

Brouder, C

Arrio, MA

Sainctavit, P

Joly, Y

Rogalev, A

Goulon, JE

机构：

[1] LMCP, UMR 7590, F-75252 Paris 05, France

[2] CNRS, Cristallog Lab, F-38042 Grenoble, France

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

JOURNAL OF SYNCHROTRON RADIATION | 2001年 / 8卷 / 02期

关键词：

electric quadrupole transitions; pyrite;

D O I：

10.1107/S0909049500016861

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Electric quadrupole transitions are revealed through the angular dependence of X-ray absorption spectra in a cubic crytal. Data collection was achieved at the iron K-edge in pyrite (FeS2) by using the angular moment method developed for X-ray Natural Circular Dichoism (XNCD) measurements. The natural linear dichroism (XNLD) was found to be around 0.5% of the edge jump. Experimental results are compared with monelectronic and multilectronic calculations. Calculations allow to quantitatively determine the proportion of quadrupolar transitions in the pre-edge structure and the anisotropy is explained in terms of structural and electronic parameters.

引用

收藏

页码：460 / 462

页数：3

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