Mössbauer Spectroscopy of Internal Interfaces in Metals

2013 ◽  
Vol 333 ◽  
pp. 157-173
Author(s):  
Vladimir V. Popov
Keyword(s):  
Mössbauer Spectroscopy ◽  
Nanocrystalline Materials ◽  
Mossbauer Spectroscopy ◽  
Coarse Grained ◽  
Resonance Spectroscopy ◽  
Multilayered Structures ◽  
Mößbauer Spectroscopy ◽  
Nuclear Gamma Resonance ◽  
Non Equilibrium

A brief review on various possibilities of studying internal interfaces in metals by various methods of Mössbauer (nuclear gamma-resonance) spectroscopy is presented. Specific features of investigations of different interfaces in various materials are considered, such as equilibrium boundaries of recrystallization origin in coarse-grained materials, non-equilibrium boundaries in submicro-and nanocrystalline materials and interlayer boundaries in multilayered structures.

Mushroom elbaite from the Kat Chay mine, Momeik, near Mogok, Myanmar: I. Crystal chemistry by SREF, EMPA, MAS NMR and Mössbauer spectroscopy

2008 ◽  
Vol 72 (3) ◽  
pp. 747-761 ◽  
Author(s):  
A. J. Lussier ◽  
P. M. Aguiar ◽  
V. K. Michaelis ◽  
S. Kroeker ◽  
S. Herwig ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Short Range ◽  
Mossbauer Spectroscopy ◽  
Structure Refinement ◽  
Magic Angle Spinning ◽  
Resonance Spectroscopy ◽  
Magic Angle ◽  
Mößbauer Spectroscopy ◽  
Two Samples ◽  
Angle Spinning

AbstractTourmaline from the Kat Chay mine, Momeik, near Mogok, Shan state, Myanmar, shows a variety of habits that resemble mushrooms, and it is commonly referred to as ‘mushroom tourmaline'. The structure of nine single crystals of elbaite, ranging in colour from pink to white to black and purple, extracted from two samples of mushroom tourmaline from Mogok, have been refined (SREF) to R indices of ~2.5% using graphite-monochromated Mo-Kα X-radiation. 11B and 27Al Magic Angle Spinning Nuclear Magnetic Resonance spectroscopy shows the presence of [4]B and the absence of [4]Al in samples with transition-metal content low enough to prevent paramagnetic quenching of the signal. Site populations were assigned from refined site-scattering values and unit formulae derived from electron-microprobe analyses of the crystals used for X-ray data collection. 57Fe Mössbauer spectroscopy shows that both Fe2+ and Fe3+ are present, and the site populations derived by structure refinement show that there is no Fe at the Z site; hence all Fe2+ and Fe3+ occurs at the Y site. The 57Fe Mössbauer spectra also show peaks due to intervalence charge-transfer involving Fe2+ and Fe3+ at adjacent Y sites. Calculation of the probability of the total amount of Fe occurring as Fe2+–Fe3+ pairs for a random short-range distribution is in close accord with the observed amount of Fe involved in Fe2+–Fe3+, indicating that there is no short-range order involving Fe2+ and Fe3+ in these tourmalines.

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

Minerals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 612 ◽  
Author(s):  
Alevtina A. Maksimova ◽  
Michael V. Goryunov ◽  
Michael I. Oshtrakh
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Planetary Science ◽  
Resonance Spectroscopy ◽  
Martian Surface ◽  
Powerful Technique ◽  
Mößbauer Spectroscopy ◽  
Nobel Prize In Physics ◽  
Extraterrestrial Material ◽  
Science Part

Mössbauer (nuclear γ-resonance) spectroscopy is a powerful technique which 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, got a Nobel Prize in physics in 1961 for this discovery. 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 an 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 a recent investigation of the Martian surface using two rovers equipped with miniaturized Mössbauer spectrometers. Part I considered the results of Mössbauer spectroscopy of undifferentiated meteorites. Part II discusses the results of Mössbauer spectroscopy of differentiated meteorites formed in asteroids and protoplanets due to matter differentiation, as well as Lunar and Martian matter.

Sign in / Sign up

Export Citation Format

Share Document