title: Occurrence of difluorine F2 in nature--in situ proof and quantification by NMR spectroscopy.
abstract: The most reactive chemical element, F(2), has been claimed not to occur in nature. First direct evidence from in situ NMR spectroscopy now proves that elemental F(2) indeed occurs in nature as an occlusion in "antozonite" (right in the picture), a variant of fluorite (CaF(2), left).
authors: Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377 München, Germany.
authors: Jörn
authors: J
authors: Schmedt auf der Günne
authors: Martin
authors: M
authors: Mangstl
authors: Florian
authors: F
authors: Kraus