Zinc Losses from and Zinc Isotopic Abundances in Residues Formed by Heating of Zn, ZnO, ZnS, and Zn-Doped Silicate Glass

Physics

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Chondrules, Fractionation: Mass-Dependent, Isotopes: Zinc, Zinc: Evaporation Of

Scientific paper

To find out whether 1) losses of Zn might occur and 2) leave an isotopic imprint under conditions relevant to the formation of chondrules, we carried out a set of controlled heating experiments. Silicate mixtures doped with zinc as metal, as oxide, or as sulfide lose appreciable quantities of that element --from 25% to more than 90%. When introduced as metal or as oxide, but not as sulfide, the Zn also undergoes mass-dependent fractionations up to 0.5%/AMU.

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