Theo Hahn

from Wikipedia, the free encyclopedia

Theo Hahn (born January 3, 1928 in Duisburg , † February 12, 2016 in Aachen ) was a German mineralogist and crystallographer.

Life

Hahn studied mineralogy and crystallography at the University of Marburg and the Goethe University Frankfurt am Main , where he received his doctorate in 1952 under Herbert O´Daniel ( fluoberyllate as a model for silicates ). As a post-doctoral student , he spent four years at the Massachusetts Institute of Technology with Martin J. Buerger . From 1956 he was back in Frankfurt as a senior assistant at the Mineralogical Institute, where he completed his habilitation in 1960 ( methods and results of exact crystal structure research ), where he dealt with computer methods of single crystal structure determination . In 1963 he became professor for crystallography at RWTH Aachen University and director of the institute for crystallography. 1970 to 1972 he was Dean of the Faculty of Mining, Metallurgy and Geosciences.

He investigated crystal structures with X-ray and neutron diffraction, for which he led a neutron diffraction research group at Forschungszentrum Jülich . Hahn was mainly concerned with the crystal chemistry of oxides such as silicates, germanates, sulfates, and stuffed tetrahedral compounds as models of silicates. He also dealt with polymorphism and twinning. He worked on the International Tables for Crystallography and was chairman of the "International Tables" commission from 1972 to 2009. For the new edition of Volume A of the International Tables (first published in 1983), he wrote the section on point groups and symmetry classes .

From 1982 to 1984 Hahn was chairman of the German Mineralogical Society and from 1984 to 1987 president of the International Union of Crystallography .

Honors

In 1997 Hahn received the Abraham Gottlob Werner Medal and in 2001 the Carl Hermann Medal . In 1997 he became an honorary member of the German Society for Crystallography .

Web links

literature

  • Obituary Theo Hahn . GMIT Geoscientific Communications No. 63 (March 2016), p. 105, ISSN  1616-3931
  • Helmut Klapper: Theo Hahn (1928-2016) , Acta Cryst., A72, 2016, pp. 294–295 (English, with photo) (Link to PDF file: 0.15 MB)
  • Institute for Crystallography at RWTH Aachen University: Prof. Dr. Theo Hahn 1928-2016 (German, with photo) (Link to PDF-File: 0.12 MB)

Individual evidence

  1. ^ Obituary notice Theo Hahn , FAZ , February 18, 2016


personal data
SURNAME Hahn, Theo
BRIEF DESCRIPTION German crystallographer and mineralogist
DATE OF BIRTH January 3, 1928
PLACE OF BIRTH Duisburg
DATE OF DEATH February 12, 2016
Place of death Aachen