Title

Influence of Silicon and Phosphorus on Structural and Magnetic Properties of Synthetic Goethite and Related Oxides

Abstract

Very low level incorporation produced materials having structural and spectral properties similar to those of poorly crystalline synthetic or natural goethite. At higher incorporation levels, mixtures of noncrystalline materials were obtained which exhibited Mossbauer spectra typical of noncrystalline materials mixed with a superparamagnetic component. Microbeam electron diffraction indicated that these mixtures contained poorly crystalline goethite, poorly crystalline ferrihydrite, and a noncrystalline component. If the material was prepared with no aging of the alkaline Fe**3** plus solution before the addition of Na//2HPO//4 or Na//2SiO//3, materials were obtained containing little if any superparamagnetic component. If the alkaline Fe**3** plus solution was aged for 48 hr before the addition, goethite nuclei formed and apparently promoted the precipitation of a superparamagnetic phase. Additional study results are discussed.

Department(s)

Chemistry

International Standard Serial Number (ISSN)

0009-8604

Electronic OCLC #

747309393

Print OCLC #

2244738

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1988 The Clay Minerals Society, All rights reserved.


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