Hello Aziz and Forum, http://www.flickr.com/photos/azizhabibi/page3/
Aziz asked: "what is the process that make it looking like that" Me too, I recall having seen that before but don't remember exactly where, when and what ... Willamette maybe ??? I can offer three [theoretical (!)] solutions to this gold coloration: 1) the result of an etching process in situ 2) an *extremely* phosphide-rich iron 3) a combination of (1) and (2) (1) and (3) might explain Aziz's question about "why the Widmanstätten pattern is showing on the surface". => a result of etching (in situ) (2) is a promising theory too because schreibersite is yellow in reflected light. To me it looks slightly brownish and Buchwald says that "compared to cohenite, [schreibersite] is distinctly more brownish." Buchwald also says that "when the phosphides happen to be located in the heat-affected alpha2 rim zone,...they will melt when rapidly reheated above 1100°C. Just a thought, no more, no less, Bernd ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
