Inorganic chemistry Z 0100Magnetic and Structural Properties of Isolated and Assembled Clusters -[227 refs.]. -(BANSMANN, J.; BAKER, S. H.; BINNS, C.; BLACKMAN, J. A.; BUCHER, J.-P.; DORANTES-DAVILA, J.; DUPUIS, V.; FAVRE, L.; KECHRAKOS, D.; KLEIBERT, A.; et al.; Surf. Sci. Rep. 56 (2005) 6-7, 189-275; Inst. Phys., Univ. Rostock, D-18051 Rostock, Germany; Eng.) -Schramke 52-215

The design and operation of a gas aggregation source is described. The source combines the attributes of high-temperature operation (enabling preparation of transition metal clusters), mass selection, ultrahigh vacuum compatibility, and transportability. This makes it ideally suited to in situ studies such as scanning tunneling microscope or synchrotron radiation experiments. Data are presented to illustrate the performance of the source; recent results obtained in synchrotron radiation studies are highlighted.

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Abstract-The mineralogy of comet 81P/Wild 2 particles, collected in aerogel by the Stardust mission, has been determined using synchrotron Fe-K X-ray absorption spectroscopy with in situ transmission XRD and X-ray fluorescence, plus complementary microRaman analyses. Our investigation focuses on the terminal grains of eight Stardust tracks: