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Effect of Crystallinity and Al Substitution on the Applied‐Field Mössbauer Spectra of Iron Oxides and Oxyhydroxides
Author(s) -
de Grave Eddy,
de Bakker Paul M. A.,
Bowen Lawrence H.,
Vandenberghe Robert E.
Publication year - 1992
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19921550519
Subject(s) - crystallinity , mössbauer spectroscopy , characterization (materials science) , spectral line , substitution (logic) , materials science , analytical chemistry (journal) , metallurgy , crystallography , mineralogy , chemistry , nanotechnology , physics , environmental chemistry , computer science , astronomy , programming language
Applied‐field Mössbauer spectra are reported for selected synthetic samples of α‐Fe 1‐x Al x OOH, γ‐Fe 1‐x Al x OOH, δ‐FeOOH, α‐(Fe 1‐x Al x ) 2 O 3 and γ‐Fe 2 O 3 . Field strengths of up to 90 kOe were used at temperatures of mostly 4.2 K. The effects of the Al substitution and/or the crystallinity are discussed. Specific characteristics of the spectra are enlightened which might serve as complimentary sources of information for the characterization of soil oxides and oxyhydroxides. It is pointed out that several questions remain unanswered to date and that further systematic research is justified.