[John R. Helliwell]

Bragg Lecture 2001

X-ray crystal structure analysis and Manchester: from W. L. Bragg to the present day

Professor John R. Helliwell

Professor of Structural Chemistry at the University of Manchester

As part of the 150th anniversary celebrations of the University of Manchester, the Department of Physics and Astronomy organised a special lecture, delivered by Professor J. R. Helliwell, reviewing Lawrence Bragg's association with the university and the many consequent contributions to X-ray crystallography. A notable feature of this lecture was the live demonstrations and experiments illustrating some of the scientific principles discussed.

Helliwell, J. R. (2009). J. Appl. Cryst. 42, 365, doi: 10.1107/S0021889809002775

display area

Demonstration 1: simulation of powder diffraction pattern
[Demonstration 1]
(3 min 20 sec)

Demonstration 2: phases of reflections in crystallography via a 'viewgraphs' Fourier analysis simulator
[Demonstration 2]
(3 min 40 sec)

Demonstration 3: microwave analogue of diffraction
[Demonstration 3]
(3 min 05 sec)

Demonstration 4: double refraction in calcite
[Demonstration 4]
(4 min 06 sec)

Complete lecture
[Bragg Lecture 2001]
(46 min 36 sec)