Magnetic Behavior and Infrared Spectra of Jarosite, Basic Iron Sulfate, and Their Chromate Analogs
Abstract
The magnetic behavior and infrared spectroscopic features of KFe_3(SO_4)_2(OH)_6 (jarosite), (H_3O)Fe_3(SO_4)_2(OH)_6 (hydronium jarosite), KFe_3(CrO_4)_2(OH)_6, Fe(OH)SO_4 (basic iron sulfate) and Fe(OH)CrO_4 (basic iron chromate) are reported. Spectroscopic data are in accord with X-ray data which show that KFe_3(SO_4)_2(OH)_6, (H_3O)Fe_3(SO_4)_2(OH)_6, and KFe_3(CrO_4)_2(OH)_6 are isostructural with KAl_3(SO_4)_2(OH)_6 (akunite). All the species exhibit negative deviations from Curie-Weiss behavior over the temperature range 300-76°K. The compounds KFe_3(CrO_4)_2(OH)_6 and Fe(OH)CrO_4 undergo ferrimagnetic transitions at 73 and 71°K, respectively. Maxima occur in the susceptibilities of KFe_3(SO_4)_2(OH)_6 and (H_3O)Fe_3(SO_4)_2(OH)_6 at 45 and 50°K.
Additional Information
© 1975 Academic Press, Inc. Received February 22, 1974. Dana A. Powers would like to thank the Fannie and John Hertz Foundation for the award of a fellowship. This research was supported by the National Science Foundation.Additional details
- Eprint ID
- 37970
- DOI
- 10.1016/0022-4596(75)90075-4
- Resolver ID
- CaltechAUTHORS:20130416-112533291
- Fannie and John Hertz Foundation
- NSF
- Created
-
2013-04-16Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences
- Other Numbering System Name
- Caltech Division of Chemistry and Chemical Engineering
- Other Numbering System Identifier
- 4839