Journal ArticleDOI
X-ray photoelectron studies of the mechanism of iron silicate dissolution during weathering
Jacques Schott,Robert A. Berner +1 more
TLDR
In the presence of dissolved O2, as would be the case in most weathering solutions, dissolution of bronzite and fayalite results in the formation of two surface layers whose compositions were deduced by measurements of XPS binding energies as mentioned in this paper.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1983-12-01. It has received 182 citations till now. The article focuses on the topics: Dissolution & Surface layer.read more
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Chemical weathering ,a tmospheric co 2 , and climate
TL;DR: There has been considerable controversy concerning the role of chemical weathering in the regulation of the atmospheric partial pressure of carbon dioxide, and thus the strength of the greenhouse effect and global climate.
Journal ArticleDOI
The coordination chemistry of weathering: I. Dissolution kinetics of δ-Al2O3 and BeO
Gerhard Furrer,Werner Stumm +1 more
TL;DR: In this article, the dissolution kinetics of slightly soluble oxides and silicates are controlled by chemical processes at the surface, and the reaction controlling steps can be interpreted in terms of a surface coordination model.
Journal ArticleDOI
The cycling of iron in natural environments : considerations based on laboratory studies of heterogeneous redox processes
Werner Stumm,Barbara Sulzberger +1 more
TL;DR: The various pathways for the oxygenation of ferrous iron and for the dissolution of Fe(III) (hydr) oxides, especially by reducing ligands with oxygen donor atoms in thermal and photochemical processes, are assessed on the basis of laboratory experiments for application to natural systems.
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A new kinetic approach to modeling water-rock interaction: The role of nucleation, precursors, and Ostwald ripening
TL;DR: In this paper, a new approach to water-rock interaction is developed which replaces the assumption of partial equilibrium with a complete calculation of the rates at which minerals form and dissolve, and the evolution of reaction-flow systems towards equilibrium with respect to secondary phases is examined in terms of the important processes which generate and modify reactive surface areas of minerals.
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Structure and bonding environments at the calcite surface as observed with X-ray photoelectron spectroscopy (XPS) and low energy electron diffraction (LEED)
TL;DR: In this paper, the exact electron binding energies for the atoms in calcite were determined with XPS using the gold dot method, and the results are 290.1 ± 0.1 eV for C1s, 347.7 and 351.2 ± 1.15 eV respectively.