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Spectroscopic and magnetic studies of ferric iron hydroxy sulfates: the series Fe(OH)SO_4·nH_2O and the jarosites

Rossman, George R. (1976) Spectroscopic and magnetic studies of ferric iron hydroxy sulfates: the series Fe(OH)SO_4·nH_2O and the jarosites. American Mineralogist, 61 (5-6). pp. 398-404. ISSN 0003-004X.

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Optical and infrared absorption and magnetic susceptibility data are reported for the ferric iron hydroxy sulfate minerals and compounds: basic iron sulfate, Fe(OH)SO_4; butlerite, Fe(OH)SO_4.2H2_O; parabutlerite, Fe(OH)SO4_.2H_2O; fibroferrite, Fe(OH)SO_4.5H_2O; jarosite, KFe_3(SO_4)_2(OH)_6; and stewartite, MnFe_2(H_2O)_6(OH)_2(PO_4)_2. The relationships among intensity of color, indices of refraction, pleochroism, anti ferromagnetic interaction among Fe^(3+) ions, and structure are discussed for 7 Ā corner-linked chain structures and the two-dimensional Fe^(3+) sheets of the jarosites. For all of these compounds the greatest intensity of the Fe^(3+) absorption bands and the highest refractive index occur when the vibration direction of the incident light is aligned with the cation chains or in the plane of the jarosite sheets. The ligandfield absorption band intensities of all of these compounds are enhanced up to two orders of magnitude above what they are in magnetically dilute compounds.

Item Type:Article
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Rossman, George R.0000-0002-4571-6884
Additional Information:© 1976 Mineralogical Society of America. Manuscript received, July 18, 1975; accepted for publication, December 23, 1975. Thanks are due to P. B. Moore who provided the stewartite specimens, Miles Silberman and F. J. Baum, Jr. who provided samples of jarosite, Rock Currier who provided a group of parabutlerite crystals, and the National Museum of Natural History, Smithsonian Institution which provided the butlerite.
Group:UNSPECIFIED, Division of Geological and Planetary Sciences
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Caltech Division of Geological and Planetary Sciences2537
Issue or Number:5-6
Record Number:CaltechAUTHORS:20130513-101527784
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Official Citation: G. R. Rossman Spectroscopic and magnetic studies of ferric iron hydroxy sulfates; the series Fe(OH)SO 4.nH 2 O and the jarosites American Mineralogist, June 1976, v. 61, p. 398-404
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38444
Deposited By: Ruth Sustaita
Deposited On:13 May 2013 17:44
Last Modified:26 Nov 2019 11:15

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