Temperature dependent high velocity resolution Mössbauer spectroscopic study of iron nickel phosphide microcrystals (rhabdites) extracted from Sikhote-Alin iron meteorite

Оштрах, М. И.; Larionov, M. Yu.; Grokhovsky, V. I.; Semionkin, V. A.

doi:10.1016/j.jallcom.2010.10.039

Cited by 8 publications

(8 citation statements)

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“…Mössbauer spectroscopy (Figure 16) shows that the main element, Fe (39%), is only related to the abundance of maghemite and troilite. The RT spectrum is similar to that obtained for schreibersite pieces of Sikhote-Alin iron meteorite [40][41][42][43] but, in fact, in our case it shows superparamagnetic behavior with iron in trivalent coordination, as indicated in Table 5, and splits at 4.2 K. Most of the 4.2 K spectrum was fitted with the two sextets of maghemite expected at this temperature (see for instance [44]), plus a very small amount (1.1%) of troilite (FeS). Troilite was fitted with only one sextet, as explained in other works [45], instead of an octet.…”

Section: Stony Meteoritesupporting

confidence: 75%

57Fe Mössbauer Analysis of Meteorites and Tektites

et al. 2021

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This review presents studies on iron meteorites (Campo del Cielo fall and an unregistered iron meteorite), an unregistered stony meteorite from Northwest Africa, and 13 tektites from the American, European, and Australasian strewn fields. The main experimental technique used in the studies was Mössbauer spectroscopy, both in transmission and backscattering geometries. For the latter, a MIMOS II spectrometer was used. Additionally, optical and scanning electron microscopies and X-ray diffraction were used. In the studied iron meteorites, kamacite is found as the main mineral. Campo del Cielo meteorite exhibits Widmanstätten patterns and schreibersite inclusions. The unregistered iron meteorite has Neumann lines and schreibersite inclusions. We have assigned Campo del Cielo as an octahedrite and the unregistered iron meteorite as a hexahedrite. The unregistered stony meteorite is composed mainly of iron-free silicates; at 4.2 K, the spectrum indicates maghemite and 1% troilite. The Cambodian tektite appeared individualized from other australasites, unlike the moldavite, which tends to cluster with them. Our analyses do not allow dismissing doubts on the provenance of tibetanites. The Fe3+/Fe2+ ratio was found to be higher for Muong Nong-type tektites than for splash-form tektites, as expected from their morphology and solidification from melt at lower temperature.

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Section: Stony Meteoritesupporting

confidence: 75%

57Fe Mössbauer Analysis of Meteorites and Tektites

et al. 2021

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“…The separates of (Fe, Ni)3P inclusions from Sikhote-Alin IIAB in the forms of massive schreibersite and rhabdite microcrystals were studied by Mössbauer spectroscopy in [94][95][96][97]. These iron nickel phosphides had a crystal structure with three non-equivalent sites M1, M2, and M3 for the metal atoms, which presented different probabilities of occupation by Fe and Ni, as well as differences in these probabilities between schreibersite and Troilite extracted from the iron meteorites Cape York IIIAB, Nantan IAB-MG, and Sikhote-Alin IIAB was studied by Mössbauer spectroscopy in [87][88][89][90][91].…”

Section: Iron Meteoritesmentioning

confidence: 99%

Applications of Mössbauer Spectroscopy in Meteoritical and Planetary Science, Part II: Differentiated Meteorites, Moon, and Mars

2021

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Mössbauer (nuclear γ-resonance) spectroscopy is a powerful technique that is actively used in various fields, from physics and chemistry to biology and medicine. Rudolf L. Mössbauer, who observed nuclear γ-resonance and published his results in 1958, received a Nobel Prize in physics in 1961 for this discovery. The 57Fe is the most widely used nucleus in Mössbauer spectroscopy. Therefore, a large variety of compounds containing iron can be studied by Mössbauer spectroscopy. It is well known that planetary matter contains various iron-bearing phases and minerals. Therefore, the extraterrestrial material from different meteorites, asteroids, and planets can be studied using 57Fe Mössbauer spectroscopy as additional powerful technique. Two parts of this review consider the results of more than 50 years of experience of Mössbauer spectroscopy applied for the studies of various meteorites, soils, and rocks from the Moon and recent investigation of the Mars surface using two rovers equipped with miniaturized Mössbauer spectrometers. Part I will discuss known results on Mössbauer spectroscopy of undifferentiated meteorites, which are the most primitive and formed with the solar system.

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“…При исследовании микроструктуры претерпевших динамическое нагружение образцов метеорита Сихотэ-Алинь был отмечен вязкий характер деформаций. Об этом свидетельствует характер прохождения сдвигов через тонкие пластины роалдита (Fe,Ni) 4 N. Следы хрупкого разрушения хорошо проявляются на включениях стержневидных рабдитов (Fe,Ni) 3 Р, которые в недеформированном состоянии в шлифе представляют правильный прямоугольник или ромб [17]. На некоторых участках ограненные фосфиды переплавлялись полностью, либо частично, с образованием каймы вокруг непревращенного фосфида.…”

Section: результаты и их обсуждениеunclassified

An effect of contact melting in the Sikhote-Alin iron meteorite after isentropic spherical shock waves loading

Muftakhetdinova¹,

Grokhovsky²,

Yakovlev³

et al. 2015

LoM

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Представлены результаты изучения методами растровой электронной и оптической микроскопии особенностей структурных изменений образцов метеорита Сихотэ-Алинь, претерпевших сферическое взрывное нагружение. Подробно проанализированы участки метеорита Сихотэ-Алинь со структурой, связанной с проявлением контактного плавления на межфазной границе камасит (α-Fe(Ni,Co), Ni<7,5 %)-рабдит ((Fe,Ni) 3 P). Предполагается, что такие участки образовались при локальном повышении температуры на фазе сжатия. Ограненные фосфиды при этом либо полностью переплавляются, либо частично, с образованием каймы вокруг непревращенного фосфида. Целью работы было определение фазового и химического состава области контактного плавления (каймы). С помощью микрорентгеноспектрального анализа получено пространственное распределение элементов и определен химический состав области контактного плавления. Установлено, что в области контактного плавления наблюдается пониженное содержание фосфора и никеля в сравнении с неизмененной частью фосфида. Состав этой области соответствует составу тройной эвтектики и температура в областях контактного плавления превышала 950 ⁰С. Анализ фазовых и ориентационных карт, полученных методом EBSD, показал, что кайма имеет поликристаллическую структуру, образованную фазой с ОЦК решеткой, т. е. в области контактного плавления образуется пересыщенный твердый раствор фосфора в α-Fe(Ni,Co).

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Temperature dependent high velocity resolution Mössbauer spectroscopic study of iron nickel phosphide microcrystals (rhabdites) extracted from Sikhote-Alin iron meteorite

Cited by 8 publications

References 8 publications

57Fe Mössbauer Analysis of Meteorites and Tektites

57Fe Mössbauer Analysis of Meteorites and Tektites

Applications of Mössbauer Spectroscopy in Meteoritical and Planetary Science, Part II: Differentiated Meteorites, Moon, and Mars

An effect of contact melting in the Sikhote-Alin iron meteorite after isentropic spherical shock waves loading

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