The crystal structure and vibrational spectroscopy of jarosite and alunite minerals

Spratt, Henry, Rintoul, Llewellyn, Avdeev, Maxim, & Martens, Wayde N. (2013) The crystal structure and vibrational spectroscopy of jarosite and alunite minerals. American Mineralogist, 98(10), pp. 1633-1643.

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The alunite supergroup of minerals is a large hydroxy-sulfate mineral group, which has seen renewed interest following their discovery on Mars. Numerous reviews exist concerning nomenclature, formation, and natural occurrence of this mineral group. Sulfate minerals in general are widely studied and their vibrational spectra are well characterized. However, no specific review concerning alunite and jarosite spectroscopy and crystal structure has been forthcoming. This review focuses on the controversial aspects of the crystal structure and vibrational spectroscopy of jarosite and alunite minerals. Inconsistencies regarding band assignments especially in the 1000–400 cm−1 region plague these two mineral groups and result in different band assignments among the various spectroscopic studies. There are significant crystallographic and magnetic structure ambiguities with regards to ammonium and hydronium end-members, namely, the geometry these two ions assume in the structure and the fact that hydronium jarosite is a spin glass. It was also found that the synthetic causes for the super cell in plumbojarosite, minamiite, huangite, and walthierite are not known.

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6 citations in Web of Science®

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ID Code: 70653
Item Type: Journal Article
Refereed: Yes
Keywords: Jarosite minerals, Alunite minerals, Vbrational spectroscopy, Raman spectroscopy, Infrared spectroscopy, Crystal structure, Magnetic structure, Super cell
DOI: 10.2138/am.2013.4486
ISSN: 0003-004X
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Mineralogy and Crystallography (040306)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Mineralogical Society of America
Deposited On: 30 Apr 2014 01:08
Last Modified: 03 May 2014 16:22

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