Refractory metal particles in refractory inclusions in the Allende meteoriteSEM and X-ray analysis were used to study refractory metal particles in five calcium-aluminum-rich inclusions in the Allende meteorite, and a complex variety of compositions and large departures from equilibrium were found. It is suggested that these particles could have been primordial condensates which were isolated from the nebula and from each other at different times by cocondensing oxides. Selective diffusion and/or oxidation of the more oxidizable metals (Mo, W, Fe, and Ni), phase segregations into different alloy phases (fcc, bcc, hcp, and, possibly, ordered phases), and the formation of metastable condensates could have been involved in the genesis of these materials
Document ID
19820038767
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Fuchs, L. H. (Argonne National Lab. IL, United States)
Blander, M. (Argonne National Laboratory Argonne, IL, United States)