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Adatom Fe(III) on the hematite surface: Observation of a key reactive surface species by Carrick M. Eggleston; Andrew G. Stack; Kevin M. Rosso; Angela M. Bice is a Environmental Science article available to read on EtoBox.

What is Adatom Fe(III) on the hematite surface: Observation of a key reactive surface species about?

The reactivity of a mineral surface is determined by the variety and population of different types of surface sites (e.g., step, kink, adatom, and defect sites). The concept of "adsorbed nutrient" has been built into crystal growth theories, and many other studies of mineral surface reactivity appeal to ill-defined "active sites." Despite their theoretical importance, there has been little direct experimental or analytical investigation of the structure and properties of such species. Here, we use and scanning tunneling microcopy (STM) combined with calculated images based on a resonant tunneling model to show that observed nonperiodic protrusions and depressions on the hematite (001) surface can be explained as Fe in an adsorbed or adatom state occupying sites different from those that result from simple termination of the bulk mineral. The number of such sites varies with sample preparation history, consistent with their removal from the surface in low H solutions.

Who reads Adatom Fe(III) on the hematite surface: Observation of a key reactive surface species?

Author

Carrick M. Eggleston; Andrew G. Stack; Kevin M. Rosso; Angela M. Bice

Publisher

Chemistry Central; Springer (Biomed Central Ltd.); BioMed Central; Cambridge: Published by the Royal Society of Chemistry in collaboration with the Division of Geochemistry of the American Chemical Society, 2000-; London: 2006-; Springer Science and Business Media LLC (ISSN 1467-4866)

Published

2004

Language

EN

Field

Environmental Science (Physical Sciences)