"Ing. Christian ANGER" wrote: > Morasko IIICD - is it more related to IIIC or to IIID ?
Its bandwidth of 2.5 mm, its nickel content of 6.7 %, its gallium content of 98.9 ppm (only Tabarz has a higher value), and its ger- manium content of 496 ppm (only Burgavli has a higher value) would make it a group I iron and this is how Buchwald classified it. But it was reclassified as a IIICD iron by B.-G. CHOI et al. (1995) GCA 59, p. 593. Why, I don't know because most IIICD irons have a narrower bandwidth, a higher nickel content, lower gallium, germanium, and iridium values. > Mundrabilla IIICD - is it more related to IIIC or to IIID ? Its bandwidth of 0.6 mm would almost make it a IIIC, whereas its nickel content is too low for groups IIIC and IIID, and again, the Ga, Ge, and Ir values are too high although there are IIICDs with an iridium content of 2.1. Buchwald classified it as anomalous due to its unique structure. References: BUCHWALD V.(1975) Iron Meteorites, Vol. 3, pp. 836-838. WASSON J.T. (1974) Meteorites: Classification and Properties (Springer-Verlag, Berlin-Heidelberg-New York, p. 36). Best wishes, Bernd ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
