کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1234200 968824 2010 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Raman spectroscopic investigation on Jarosite–Yavapaiite stability
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Raman spectroscopic investigation on Jarosite–Yavapaiite stability
چکیده انگلیسی

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 × 10−2 Torr), 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 75, Issue 1, January 2010, Pages 162–171
نویسندگان
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