Journal ArticleDOI
Mossbauer-effect study of natural greigite.
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TLDR
In this paper, the hyperline parameters of relatively well crystallized grelgite (Fe3S4) have been determined by Mossbauer spectroscopy on a natural greigite-smythite sample.Abstract:
The hyperline parameters of relatively well crystallized grelgite (Fe3S4) have been determined by Mossbauer spectroscopy on a natural greigite-smythite sample. Applied-field measurements confirm the ferrimagnetic behavior. Saturation values of the magnetic hyperfine fields are 31.8 and 33.0 T for the tetrahedral and octahedral Fe respectively. The temperature dependence implies a Curle temperature of at least 800K. In addition, the analyses of the spectra provide some information about smythite for which the spectra seem to be composed of at least three sextets.read more
Citations
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Magnetic properties of sedimentary greigite (Fe3S4)
TL;DR: In this paper, the previously poorly known magnetic characteristics of sedimentary greigite (Fe3S4) have been investigated and several diagnostic magnetic properties can be used in conjunction to rapidly screen sediments to detect the presence of Greigite.
Journal ArticleDOI
Magnetic properties of sedimentary greigite (Fe3S4): An update
Andrew P. Roberts,Andrew P. Roberts,Liao Chang,Christopher J. Rowan,Christopher J. Rowan,Chorng-Shern Horng,Fabio Florindo +6 more
TL;DR: In this paper, the authors systematically document the known magnetic properties of greigite (at high, ambient, and low temperatures and with alternating and direct fields) and illustrate how grain size variations affect magnetic properties.
Journal ArticleDOI
On the methodology of the analysis of Mössbauer spectra
TL;DR: In this article, a review of the direct fitting procedures used in the analysis of Mossbauer spectra is presented, including direct lineshape fitting with alternative profiles as well as shape-dependent, shapeindependent and quasi shapeindependent distribution fitting methods all can easily be incorporated in one computer program scheme yielding a large versatility for modification and/or extension of the programs according to specific spectra.
Journal ArticleDOI
Magnetic properties of hydrothermally synthesized greigite (Fe3S4)- II. High- and low-temperature characteristics
TL;DR: In this paper, the magnetic behavior of hydrothermally synthesized greigite was analyzed in the temperature range from 4 K to 700°C, with emphasis on the temperature ranges below 50 K.
Journal ArticleDOI
Fundamental magnetic parameters from pure synthetic greigite (Fe3S4)
TL;DR: In this article, the saturation magnetization of pure ferrimagnetic greigite (Fe3S4) was confirmed by X-ray diffraction, neutron diffraction and Mossbauer spectroscopy, coupled with magnetic measurements.
References
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Journal Article
Greigite, the thio-spinel of iron; a new mineral
Journal ArticleDOI
Mössbauer studies of some sulphide minerals
David J. Vaughan,M.S. Ridout +1 more
TL;DR: In this paper, the authors studied the Mossbauer spectra of the mineral sulphides mackinawite, greigite, and pentlandite at different temperatures and in external magnetic fields.
Journal ArticleDOI
Mössbauer studies of iron sulphides
TL;DR: The Mossbauer spectra of pyrite, marcasite, pyrrhotite, greigite and mackinawite have been taken at room temperature.
Journal ArticleDOI
The Magnetic Properties and Mössbauer Spectra of Synthetic Samples of Fe3S4
TL;DR: In this article, the magnetic properties of synthetic Fe3S4 have been studied using both static magnetization measurements and Mossbauer effect spectrometry and two alternative band schemes are proposed to account for this feature and explain the magnetic moment.
Journal ArticleDOI
The magnetic structure of the spinel Fe3S4
TL;DR: In this paper, the spinel form of Fe3S4 has been prepared hydrothermally and two distinct patterns associated with iron on antiparallel sublattices in A and B sites were identified.