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10 February 2004 Framboidal structures in Earth rocks and in astromaterials
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Abstract
Framboidal structures are common in both Earth rocks and in meteorites - carbonaceous chondrites. The main methods of formation of these structures are discussed. The role of biologic factors in formation of framboids is elevated. Comparison of crystal forms comprising framboids formed in laboratory conditions and in nature is provided. On the basis of investigations of framboidal structures the proposition that pyritoidal form of crystals is typical for the formation of biogenic framboidal structures.
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Marina M. Astafieva, Alexei Yu. Rozanov, and Richard B. Hoover "Framboidal structures in Earth rocks and in astromaterials", Proc. SPIE 5163, Instruments, Methods, and Missions for Astrobiology VII, (10 February 2004); https://doi.org/10.1117/12.513434
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