ISIS Neutron and Muon Source Data Journal

The lattice parameter displacements in kamacite and taenite phases in metallic meteorites. Are they generated by real strain?

Abstract: The bulk of metal meteorites consists of the Fe,Ni-alloys kamacite [α-(Fe,Ni), bcc structure] and taenite [γ-(Ni,Fe), fcc structure]. The chemical composition is dominated by Fe and Ni, which make up more than 95%. Nickel is always present with a concentration ranging between 5 and 25%. Previous Time-of-Flight Neutron Diffraction experiments using the INES beamline were carried out aiming to characterize the quantitative amount of the two main phases and their microstructure. The results were useful for the characterization of the samples but also evidenced some anomalous and very interesting trends in lattice paramter values. A possible explanation of this phenomenon requires the presence either of residual stress or of micro-structural phenomena. If confirmed, the presence of residual stresses in iron meteorites would tremendously affect the research on planetary science.

Principal Investigator: Dr Francesco Grazzi
Experimenter: Professor Giovanni Pratesi
Experimenter: Dr Stefano Caporali
Local Contact: Dr Joe Kelleher

DOI: 10.5286/ISIS.E.RB1610125

ISIS Experiment Number: RB1610125

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Francesco Grazzi et al; (2016): The lattice parameter displacements in kamacite and taenite phases in metallic meteorites. Are they generated by real strain?, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1610125

Data is released under the CC-BY-4.0 license.