Octahedral cation partitioning in Mg,Fe2+-olivine. Mössbauer spectroscopic study of synthetic (Mg0.5 Fe2+ 0.5)2SiO4 (Fa50)

Morozov, M. V.; Brinkmann, Christian; Grodzicki, Michael; Lottermoser, Werner; Tippelt, Gerold; Amthauer, Georg; Kroll, Herbert

doi:10.1007/978-3-540-49850-6_90

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…Measured and calculated spectra coincide with c 2 < 1. It is expected that at the absorber temperature of 300-C no cation exchange between M1 and M2 sites occurs within the measuring time of 5 days [10][11][12].…”

Section: Methodsmentioning

confidence: 99%

Octahedral cation partitioning in Mg,Fe2+-olivine. Mössbauer spectroscopic study of synthetic (Mg0.5 Fe2+ 0.5)2SiO4 (Fa50)

et al. 2006

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The high-temperature partitioning of Fe 2+ and Mg between the two nonequivalent octahedral M1 and M2 sites in synthetic olivine (Fa 50 ) was studied by Mö ssbauer spectroscopy. Powder samples have been equilibrated in annealing experiments performed under reducing oxygen fugacity at temperatures between 500 and 800-C followed by rapid quenching in order to prevent redistribution of cations. M-site ordering with Fe 2+ preferring M1, Mg preferring M2 sites increases continuously with rising equilibrium temperature. K D values increase from 1.21 at 500-C to 1.48 at 750-C. The results are consistent with both room temperature as well as in situ high temperature single crystal X-ray diffraction experiments of Heinemann et al. [8,9].

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Section: Methodsmentioning

confidence: 99%

Octahedral cation partitioning in Mg,Fe2+-olivine. Mössbauer spectroscopic study of synthetic (Mg0.5 Fe2+ 0.5)2SiO4 (Fa50)

et al. 2006

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“…The variations in the M1 and M2 sites cation partitioning are related to the thermal history of silicate crystals, therefore, the distribution of Fe 2+ among the M1 and M2 sites in silicates as well as its variations after thermal effects is of interest. Mössbauer spectroscopy is widely used to study various terrestrial (natural and synthetic) silicate crystals and demonstrates a superposition of two well-distinguished quadrupole doublets associated with 57 Fe in the M1 and M2 sites (see, e.g., [47][48][49]). However, in the case of ordinary chondrites, the spectra which consist of several magnetic sextets and paramagnetic quadrupole doublets and singlets, it is too difficult to distinguish spectral components which can be assigned to the M1 and M2 sites in corresponding silicate crystals due to the overlapping of these components.…”

Section: Silicate Crystalsmentioning

confidence: 99%

Advances in Analysis of the Fe-Ni-Co Alloy and Iron-Bearing Minerals in Meteorites by Mössbauer Spectroscopy with a High Velocity Resolution

Goryunov,

Maksimova,

Oshtrakh

2023

Minerals

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Meteorites are the space messengers bringing us the unique information about the Solar System formation and evolution as well as about the effects of various extreme space conditions on meteorites and their parent bodies. The main iron-bearing compounds in meteorites are Fe-Ni-Co alloy, olivine (Fe, Mg)2SiO4, orthopyroxene (Fe, Mg)SiO3, clinopyroxene (Ca, Fe, Mg)SiO3, troilite FeS, chromite FeCr2O4, hercynite FeAl2O4, ilmenite FeTiO3, daubréelite FeCr2S4, schreibersite (Fe, Ni)3P and some other compounds. Therefore, 57Fe Mössbauer spectroscopy was successfully applied for the analyses of various meteorites for about 60 years of experience. The development of Mössbauer spectrometers with a high velocity resolution, i.e., with a high discretization of the velocity reference signal up to 212, provides much better adjustment to resonance and significantly increases the spectra quality and analytical possibilities of Mössbauer spectroscopy. In fact, this permits us to decompose the complex Mössbauer spectra of meteorites using the larger number of spectral components related to reliable compounds in comparison with the results obtained using conventional Mössbauer spectrometers with discretization of the velocity reference signal up to 29. In the present review we consider the results and advances of various meteorites analyses by means of Mössbauer spectroscopy with a high velocity resolution.

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“…The Fe 2+ -Mg 2+ distribution between the two sites is of interest for mineral cooling history determination. Mössbauer spectroscopy was successfully used to distinguish M1 and M2 sites in pure synthetic olivines [1][2][3]. Recently, we demonstrated new possibilities of Mössbauer spectroscopy with a high velocity resolution in the study of ordinary chondrites and other meteorites [4][5][6].…”

Section: +mentioning

confidence: 99%

Study of olivines from Omolon and Seymchan meteorites using X-ray diffraction and Mössbauer spectroscopy with a high velocity resolution

Оштрах¹,

Petrova²,

Grokhovsky³

et al. 2012

AIP Conference Proceedings

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Articles you may be interested inStudy of Chelyabinsk LL5 meteorite fragment with a light lithology and its fusion crust using Mössbauer spectroscopy with a high velocity resolution AIP Conf. Proc. 1622, 24 (2014) Abstract. Study of olivine from Omolon and Seymchan meteorites was performed using X-ray diffraction and Mössbauer spectroscopy with a high velocity resolution. X-ray diffraction patterns were measured at room temperature while Mössbauer spectra were measured at 295 and 90 K. The orthorhombic crystal lattice parameters were evaluated for olivine from Omolon and Seymchan. These parameters appeared to be different for olivines from both meteorites. Mössbauer spectral components related to 57 Fe in crystallographically non-equivalent sites M1 and M2 in both olivines were determined and its Mössbauer hyperfine parameters were evaluated. Some differences in the tendencies of temperature dependence of spectral parameters and small variations of 57 Fe quadrupole splitting in both M1 and M2 sites of olivines from Omolon and Seymchan were found. On the basis of Mössbauer parameters and chemical data, the temperatures of equilibrium cation distribution were evaluated for both olivines.

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Octahedral cation partitioning in Mg,Fe2+-olivine. Mössbauer spectroscopic study of synthetic (Mg0.5 Fe2+ 0.5)2SiO4 (Fa50)

Cited by 3 publications

References 6 publications

Octahedral cation partitioning in Mg,Fe2+-olivine. Mössbauer spectroscopic study of synthetic (Mg0.5 Fe2+ 0.5)2SiO4 (Fa50)

Octahedral cation partitioning in Mg,Fe2+-olivine. Mössbauer spectroscopic study of synthetic (Mg0.5 Fe2+ 0.5)2SiO4 (Fa50)

Advances in Analysis of the Fe-Ni-Co Alloy and Iron-Bearing Minerals in Meteorites by Mössbauer Spectroscopy with a High Velocity Resolution

Study of olivines from Omolon and Seymchan meteorites using X-ray diffraction and Mössbauer spectroscopy with a high velocity resolution

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