‘Biggest ever’ crystal model built in Vienna

On the week of the hundredth anniversary of the Bragg’s Nobel prize in physics for originating the technique of X-ray crystallography, the world’s biggest crystal structure model is being assembled in Vienna’s city hall. It shows the repeating lattice of sodium and chloride ions found in a crystal of salt (NaCl). Standing more than three metres tall, the model shows the ionic (and iconic) structure that would make up a crystal of table salt 0.0000096mm across. The model builder, Dr Robert Krickl, has also been interviewed on the BBC’s Science in Action.