Goldschmidt2013 Conference Abstracts 2297 Compacted Nanoparticles for Evaporation behavior of forsterite Quantification in LA-ICPMS (Mg2SiO4) in a H2O-H2 gas DANIEL TABERSKY1, NORMAN LUECHINGER2, SAMUEL S. TACHIBANA1* AND A. TAKIGAWA2 2 2 1 , HALIM , MICHAEL ROSSIER AND DETLEF GÜNTHER * 1 Department of Natural History Sciences, Hokkaido 1ETH Zurich, Department of Chemistry and Applied University, N10 W8, Sapporo 060-0810, Japan. Biosciences, Laboratory of Inorganic Chemistry (*correspondence:
[email protected]) (*correspondence:
[email protected]) 2Carnegie Institution of Washington, Department of Terrestrial 2Nanograde, Staefa, Switzerland Magnetism, 5241 Broad Branch Road NW, Washington DC, 20015 USA. Gray et al. did first studies of LA-ICPMS in 1985 [1]. Ever since, extensive research has been performed to Forsterite (Mg2SiO4) is one of the most abundant overcome the problem of so-called “non-stoichiometric crystalline silicates in extraterrestrial materials and in sampling” and/or analysis, the origins of which are commonly circumstellar environments, and its evaporation behavior has referred to as elemental fractionation (EF). EF mainly consists been intensively studied in vacuum and in the presence of of laser-, transport- and ICP-induced effects, and often results low-pressure hydrogen gas [e.g., 1-4]. It has been known that in inaccurate analyses as pointed out in, e.g. references [2,3]. the evaporation rate of forsterite is controlled by a A major problem that has to be addressed is the lack of thermodynamic driving force (i.e., equilibrium vapor reference materials. Though the glass series of NIST SRM 61x pressure), and the evaporation rate increases linearly with 1/2 have been the most commonly reference material used in LA- pH2 in the presence of hydrogen gas due to the increase of ICPMS, heterogeneities have been reported for some sample the equilibrium vapor pressure.