title: Trace Determination and Pressure Estimation of Fluorine F2Caused by Irradiation Damage in Minerals and Synthetic Fluorides.
abstract: Irradiated alkali and earth alkali halides can form metal colloids and halogen molecules, which stay trapped inside the crystal. In this paper we provide19F NMR spectroscopic evidence of trapped F2fluids in heavy ion-bombarded synthesized LiF crystals as well as in a variety of the mineral Villiaumite (NaF). This is the 2nd mineral in which F2is unambiguously detected in nature. The trace quantification of the latter is in the order of magnitude of 10-6mol g-1. Pressures and densities of the F2fluids are estimated based on the theory of nuclear spin relaxation in dilute gases.
authors.affiliation: Department für Chemie und Biologie, Universität Siegen, Adolf-Reichwein-Straße 2, 57080, Siegen, Germany.
authors.forename: Vinicius R
authors.initials: VR
authors.lastname: Celinski
authors.affiliation: Fachbereich Physik, Technische Universität Darmstadt, Hochschulstraße 6, 64289, Darmstadt, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Ditter
authors.affiliation: Fachbereich Chemie, Phillipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032, Marburg, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Kraus
authors.affiliation: Fachbereich Physik, Technische Universität Darmstadt, Hochschulstraße 6, 64289, Darmstadt, Germany.
authors.forename: Franz
authors.initials: F
authors.lastname: Fujara
authors.affiliation: Department für Chemie und Biologie, Universität Siegen, Adolf-Reichwein-Straße 2, 57080, Siegen, Germany.
authors.forename: Jörn
authors.initials: J
authors.lastname: Schmedt Auf der Günne
keywords: NMR spectroscopy; double-quantum excitation; fluorine; radiation damage; relaxation