The relationship between Al and Si in biogenic silica as determined by PIXE and XAS

被引:26
作者
Beck, L [1 ]
Gehlen, M
Flank, AM
Van Bennekom, AJ
Van Beusekom, JEE
机构
[1] CEA Saclay, DRECAM, INSTN, Lab Etud Mat Faisceau Ions, F-91191 Gif Sur Yvette, France
[2] CEA Saclay, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France
[3] Univ Orsay, CEA, CNRS,MEN, LURE, F-91405 Orsay, France
[4] Netherlands Inst Sea Res, NL-1790 AB Den Burg, Netherlands
[5] Alfred Wegener Inst Polar & Marine Res, Wattenmeerstn Sylt, D-25992 List Auf Sylt, Germany
关键词
Al; Si; PIXE; XANES; EXAFS; biogenic silica;
D O I
10.1016/S0168-583X(01)01035-7
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Biogenic silica. one of the major constituents of marine sediments, is a potentially powerful paleoceanographic tool, revealing information on past productivity. Interpreting the sedimentary records of the biogenic silica requires, however, an understanding of its preservation. Dissolution of biogenic silica is controlled by the presence of trace elements such as Al. The work in this paper focuses on the association of Al and Si in biogenic silica. The composition and the atomic structure of cultured and natural diatoms were determined by using PIXE and XAS techniques. This study provides the first evidence for a structural association of Al and Si in biogenic silica. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:180 / 184
页数:5
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