Critical review of analytical applications of Mössbauer spectroscopy illustrated by mineralogical and geological examples (IUPAC Technical Report)

Abstract

We have developed a new terminology for Mössbauer pattern analysis in order to enhance the performance of qualitative analysis by Mössbauer spectroscopy. In this approach, Mössbauer parameters are considered as a function of a number of externally adjusted experimental parameters at which the spectrum has been recorded. The basis of analytical classification is the microenvironment, which is determined by an assembly of atoms causing the same hyperfine interactions at one particular class of the Mössbauer probe atoms.Since Mössbauer spectroscopy measures hyperfine interactions very sensitively, the microenvironment presents itself as a fundamental concept for analytical purposes. Our approach can also help to systematize the Mössbauer data for the identification of individual physicochemical species from the corresponding patterns present in the spectrum.

Mössbauer, X-ray and Magnetic Studies of Black Sand from the Italian Mediterranean Sea

“…Also in this fit, the two sextets of larger area can be interpreted as the presence of magnetite in both tetrahedral (magnetite A) and octahedral (magnetite B) sites, in good agreement with the previous fit 1. Based on previously published results [10,11] and on the data base present in the Fit; o) program [8], the third sextet can be interpreted as due to hematite, a mineral very often present in volcanic soils. The fit indicates also the presence of small fractions of two other minerals.…”

Structural properties study of the magneto-dielectric composite: Cr0.75Fe1.25O3 (CRFO):Fe0.5Cu0.75Ti0.75O3(FCTO)

“…The CRFO100 spectrum (Fig. 6b) exhibits a more rounded peak with wider "shoulders", characteristic of a low kurtosis distribution [31,32]. For all others samples (CRFOW, W = 83, 66, 50, 34, 17) (Fig.…”

Dehydrogenation at the Fe/Lu2O3 interface upon rapid thermal annealing

“…To exclude the presence of any FeO x magnetic oxides, spectra with an even larger velocity scale were recorded (not shown). In fact, the presence of Fe 2 O 3 and/or Fe 3 O 4 could be easily detected as the CEM-spectra of these phases are characterized by magnetically split sextets having B hf around 50 T [10]. These phases are not detected at the Fe/Lu 2 O 3 interface either on the as-deposited or on the annealed samples.…”