GIXAFS study of Fe3+ sorption and precipitation on natural quartz surfaces
Journal of Synchrotron Radiation
By: G. Waychunas, J. Davis, and R. Reitmeyer
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Abstract
Grazing-incidence EXAFS has been used to characterize the structure of Fe3+ sorbed onto natural single crystal quartz surfaces. Fe3+ sorption at ca. 5% monolayer coverage on a natural crystal allowed to equilibrate in air resulted in formation of hematite nuclei with strong texturing on r-and m-planes. EXAFS calculations suggests that both O and Fe backscattering is necessary to yield acceptable structural models, that about 50% of the sorbed iron resides in nuclei, and that the approximate dimensions of the nuclei can be estimated via Feff 7.0 calculations of various nuclei sizes and shapes.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | GIXAFS study of Fe3+ sorption and precipitation on natural quartz surfaces |
| Series title | Journal of Synchrotron Radiation |
| DOI | 10.1107/s0909049599001764 |
| Volume | 6 |
| Issue | 3 |
| Publication Date | May 01, 1999 |
| Year Published | 1999 |
| Language | English |
| Publisher | Scripts |
| Contributing office(s) | Toxic Substances Hydrology Program |
| Description | 3 p. |
| First page | 615 |
| Last page | 617 |