Comparison of the Raman spectra of natural and synthetic K- and Na-jarosites at 298 and 77 K
| العنوان: | Comparison of the Raman spectra of natural and synthetic K- and Na-jarosites at 298 and 77 K |
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| المؤلفون: | Wayde N. Martens, Ray L. Frost, Rachael-Anne Wills, Matt L. Weier |
| المصدر: | Journal of Raman Spectroscopy. 36:435-444 |
| بيانات النشر: | Wiley, 2005. |
| سنة النشر: | 2005 |
| مصطلحات موضوعية: | Stereochemistry, Hydrogen bond, Analytical chemistry, engineering.material, Spectral line, chemistry.chemical_compound, symbols.namesake, Halotrichite, chemistry, Jarosite, symbols, engineering, General Materials Science, Sulfate, Raman spectroscopy, Spectroscopy |
| الوصف: | Raman spectroscopy at 298 and 77 K was used to characterize synthetic and natural jarosites of formula M2(Fe3+)6(SO4)4(OH)12, where M = K or Na. The natural jarosites are characterized by a well-defined hydroxyl stretching pattern, in contrast to that of the synthetic jarosites. This difference is attributed to differences in hydrogen bonding in the mineral. Multiple Raman OH stretching bands are indicative of non-equivalent OH units in the structure. Jarosites are characterized by an intense, sharp band between 1007 and 1010 cm−1 attributed to the sulfate symmetric stretching mode. The bandwidth for K-jarosite is 4.4 cm−1 at 298 K and 3.6 cm−1 at 77 K in comparison with the values for synthetic jarosite of 10.0 (298 K) and 7.3 cm−1 (77 K). Differences in the spectra between the natural and synthetic jarosites are found. Reasons for these differences in the spectra are provided. Copyright © 2005 John Wiley & Sons, Ltd. |
| تدمد: | 1097-4555 0377-0486 |
| DOI: | 10.1002/jrs.1317 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::d2e561518309065d8f03e31bf50fc4a2 https://doi.org/10.1002/jrs.1317 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........d2e561518309065d8f03e31bf50fc4a2 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10974555 03770486 |
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| DOI: | 10.1002/jrs.1317 |