| Abstract: | Dr. h.c. Rolf Hosemann, the “father of the ideal paracrystal,” passed away in Berlin on September 28, 1994, in his 83rd year. Rolf Hosemann was born in 1912 at Rostock on the Baltic Sea. He studied physics at Marburg and Freiburg, in Germany. In 1939 he obtained qualifications as a university teacher upon a “Habilitationsschrift” about the small-angle x-ray scattering of cellulose. In 1950 he laid the foundation to his theory of ideal paracrystals making wide use of convolution integrals as introduced into x-ray crystallography by P. P. Ewald. M. V. Laue was so much impressed by Hosemann's papers that he asked him to join the Fritz-Haber-Institut at Berlin-Dahlem as a staff member. It was there that Hosemann compiled his extensive work of more than 370 papers. Hosemann taught a large number of students. More than ten among them became university professors. |
