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Article: The process of sulfide oxidation in some acid sulfate soil materials.
- Article from:
- Australian Journal of Soil Research
- Article date:
- July 1, 2004
- Author:
CopyrightCOPYRIGHT 2004 CSIRO Publishing. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Introduction
Acid sulfate soil (ASS) contains iron sulfides or the products of sulfide oxidation (White and Melville 1996). Pyrite (Fe[S.sub.2]) is the most common sulfide in ASS, although other sulfides including marcasite (Fe[S.sub.2]) (Sullivan and Bush 1997; Bush 2000) and iron monosulfides [i.e. amorphous sulfides, mackinawite, and greigite ([Fe.sub.3][S.sub.4])] (Bush and Sullivan 1997; Bush et al. 2000) occur in lesser amounts. These sulfide minerals are generally stable under reducing conditions below the watertable; however, on exposure to the atmosphere the acidity produced as a result of oxidation and the release of oxidation products can affect water ...
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Article: ON THE MAGIC CHARACTER OF Al^sub 6^Au^sup -^
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700+ words
... ... to oxygen. The only known exception to this oxidation are selected clusters2-5, for example, Al^sub 13^^sup -^, Al^sub 23^^sup -^, Al^sub 37^^sub -^, ... . These sizes, usually called the magic numbers6,7, owe their ...
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