Applications of Mössbauer Spectroscopy by Richard L. Cohen (Eds.)

By Richard L. Cohen (Eds.)

Show description

Read Online or Download Applications of Mössbauer Spectroscopy PDF

Similar geochemistry books

Carbonate Cementation in Sandstones: Distribution Patterns and Geochemical Evolution (IAS Special Publication 26)

Carbonate cements are quite common and plentiful in clastic sequences. They profoundly effect the standard of hydrocarbon reservoirs and provide very important details on palaeoenvironments and the chemical composition and circulate styles of fluids in sedimentary basins. regardless of this value, their distribution styles in time and house and their geochemical evolution should not but deeply explored and elucidated.

Sedimentary Organic Matter: Organic facies and palynofacies

A valid realizing of the worldwide carbon cycle calls for an appreciation of a number of the physico-chemical and organic tactics that be sure the creation, distribution, deposition and diagenesis of natural topic within the typical surroundings. This e-book is a finished interdisciplinary synthesis of this data, coupled with an natural facies procedure in keeping with info from either microscopy and bulk natural geochemistry.

Bacterial Biogeochemistry

Bacterial Biogeochemistry, 3rd variation specializes in bacterial metabolism and its relevance to the surroundings, together with the decomposition of soil, meals chains, nitrogen fixation, assimilation and relief of carbon nitrogen and sulfur, and microbial symbiosis. The scope of the recent variation has broadened to supply a historic standpoint, and covers in larger intensity subject matters akin to bioenergetic procedures, features of microbial groups, spatial heterogeneity, delivery mechanisms, microbial biofilms, severe environments and evolution of biogeochemical cycles.

Semi-quantitative Approaches for Landslide Assessment and Prediction

Within the current authors tried to have a transparent perception into the interworking of geotectonic, geomorphic, hydrologic and anthropogenic components resulting in landslide within the Shiv khola Watershed, the main worst affected zone of Darjiling Himalaya. This ebook contains the parameters accountable for landslide occasions in mountainous components.

Additional resources for Applications of Mössbauer Spectroscopy

Example text

The ι « 1 « ι ' 1 1 1 ' ' I ' ι (a) ν Ί \ ν ι Ld < Source (b) Co 57 I . I -8 . 1 -4 . PD J pQrqriKWtic Hi •12 in v I 0 1 1 4 1 1 β Pmak. 1 ! 12 VELOCITY (mm/sec) Fig. 6. Mössbauer spectra of Vicalloy at room temperature in different phases—(a) rolled after quenching from ~ 9 5 0 ° C ; (b) after heat treatment for permanent magnet properties. The main changes observed in the heat-treated state (b) as compared with as-quenched (a) are the occurrence of a paramagnetic absorption peak, a higher interval field, and a narrowing 5 7 of the absorption lines.

And confirmed the microscopic evidence of decomposition of F e 2 M o along dislocations in the martensite phase, resulting in kinetics characteristic of cylindrical geometry. The alloy containing cobalt had been shown by microscopy to nucleate not at dislocations, but instead randomly throughout the matrix. The Mössbauer results showed depletion of molybdenum, causing changes in the matrix spectrum, but no iron-bearing precipitate even after 1024 hr at 350°C (an advanced stage of homogeneous precipitation).

This mixed fee and bec structure was confirmed by x-ray diffraction. Eliezer et al. suggest that due to rapid cooling of the melt in the water-cooled arc-melting crucible, regions of the matrix adjacent to the N i 3 S n 2 are richer in iron than the average for the F e - N i matrix. These regions contribute a paramagnetic component to the spectrum for the asquenched alloys as expected from the early Mössbauer work on F e - N i alloys of J o h n s o n et al. (1963). Subsequent plastic deformation may then transform these low-nickel regions to bec by a martensitic transformation (Klosterman, 1969).

Download PDF sample

Rated 4.72 of 5 – based on 31 votes