Dennis Harries, performed his Dr. rer. nat. thesis at the Bayerisches Geoinstitute of the University of Bayreuth and is now at the Institute of Geosciences of the University of Jena. He is honoured for his talk "Pyrrhotite oxidative dissolution: Crystallographic and microstructural controls observed by FIB-TEM and 3D-topometry" which he presented at the meeting of the German and Austrian and Mineralogical Societies and the German Crystallographic Society at Salzburg.