Issue 0, 1971

Thermal behaviour of iron-containing micas in oxidising, reducing, and neutral atmospheres

Abstract

The reactions which occur on heating iron-containing micas depend on the ambient atmosphere. In vacuo, the principal reaction is dehydroxylation, accompanied by evolution of hydrogen according to the equation, 4Fe2++ 4OH- 4Fe3++ 4O2–+ 2H2. Between 500 and 600° in air or oxygen, dehydrogenation occurs before dehydroxylation. This involves simultaneous reaction of iron(II) and hydroxy-ions according to the equation, 4Fe2++ 4OH+ O2 4Fe3++ 4O2–+ 2H2O, and proceeds until either the iron(II) or the hydroxy-content of the mica has been consumed. Between 500 and 600° in hydrogen, reduction of iron(III) occurs according to the equations, 4Fe3++ 4O2–+ 2H2 4Fe2++ 4OH and 4Fe3++ 2O2–+ 2H2 4Fe2++ 2H2O. Similar reactions in deuterium provide a convenient method for introducing OD ions into iron-containing silicates.

Article information

Article type
Paper

J. Chem. Soc. A, 1971, 3062-3066

Thermal behaviour of iron-containing micas in oxidising, reducing, and neutral atmospheres

A. D. White and J. H. Sharp, J. Chem. Soc. A, 1971, 3062 DOI: 10.1039/J19710003062

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements