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Orientation relationships of carlsbergite in schreibersite and kamacite in the north Chile iron meteorite

Published online by Cambridge University Press:  05 July 2018

G. Nolze ,
G. Wagner ,
R. Saliwan Neumann ,
R. Skála  and
V. Geist
G. Nolze*
Affiliation:
Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany
G. Wagner
Affiliation:
Institute for Mineralogy, Crystallography and Materials Science, University of Leipzig, Scharnhorststrasse 20, 04275 Leipzig, Germany
R. Saliwan Neumann
Affiliation:
Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany
R. Skála
Affiliation:
Institute of Geology, Academy of Sciences of the Czech Republic, Rozvojová 135, CZ-16502 Prague, Czech Republic
V. Geist
Affiliation:
Institute for Mineralogy, Crystallography and Materials Science, University of Leipzig, Scharnhorststrasse 20, 04275 Leipzig, Germany
*
*E-mail: [email protected]
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Abstract

The crystallographic orientation of carlsbergite (CrN) in the north Chile meteorite (hexahedrite) was investigated using electron backscatter diffraction and transmission electron microscopy. These studies examined the CrN crystals in the rhabdites (idiomorphic schreibersite) and in kamacite. It was found that the CrN crystals embedded in rhabdite show a number of different orientation relationships with the host crystals. These orientations can be explained based on the lattice dimensions of both coexisting crystalline materials. It was also found that both carlsbergite and kamacite are characterized by a high dislocation density (≥ l09 cm-2) while rhabdite is free of dislocations. It is supposed that in spite of the deformed metallic matrix, a general connection between the orientation relation of all the phases involved exists.

Keywords

EBSDphosphidescarlsbergiteorientation relationshipiron meteorites
Type
Editorial
Information
Mineralogical Magazine , Volume 70 , Issue 4 , August 2006 , pp. 373 - 382
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2006

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