Raman spectroscopic investigation on Jarosite-Yavapaiite stability

被引：22

作者：

Chio, Chi Hong ^{[2
]}

Sharma, Shiv K. ^{[1
]}

Ming, Li-Chung ^{[1
]}

Muenow, David W. ^{[2
]}

机构：

[1] Univ Hawaii, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA

[2] Univ Hawaii, Dept Chem, Honolulu, HI 96822 USA

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2010年 / 75卷 / 01期

关键词：

Jarosite; Yavapaiite; Raman spectroscopy; Infrared spectroscopy; X-ray diffraction; CRYSTAL-STRUCTURE; MERIDIANI-PLANUM; HYDRONIUM JAROSITE; ALUNITE; SPECTRA;

D O I：

10.1016/j.saa.2009.10.006

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The stability of synthetic Jarosite (KFe3(SO4)(2)(OH)(6)) at low temperature and reduced atmospheric pressure has been Studied by Raman spectroscopy. Jarosite remains stable between 8 and 295 K. provided that the sample is not exposed to reduced atmospheric pressure. When exposed to reduced atmospheric pressure (2.0 x 10(-2) Tort), however, the conversion of Jarosite into a different mineral is readily detected at room temperature by the appearance of a new Raman peak. The Raman shift of this peak (1032 cm(-1)) matches with that of Yavapaiite (KFe(SO4)(2)), which can be obtained by thermal decomposition of Jarosite above 473 K. These Studies provide a better understanding of the stability of Jarosite subjected to conditions similar to that on the surface of Mars. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：162 / 171

页数：10

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