* Astronomy

Discontinuous precipitation from kamacite in the Sinai meteorite: first occurrence in an L-group chondrite

Hitherto most discussion of metal structures in meteorites, and their development, has centred on the plane interface model of perpendicular diffusion- controlled growth. More recently Axon and Grokhovsky (1982) have described the development of metal structures in the Richardton (H5) chondrite by the process of discontinuous precipitation. This is a process by which cells of duplex x + y structure grow from parent phase, a or y, by virtue of a moving cell interface between the parent and duplex structures with atomic migration along or parallel to the length of the moving interface. The present report is intended to record the presence of discontinuous precipitation structures in the Sinai (L6) stone
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