Max von Laue
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Max Theodor Felix von Laue was a German physicist who received the Nobel Prize in Physics in 1914 "for his discovery of the diffraction of X-rays by crystals."
Laue in 1929
One of the zincblende X-ray interference patterns published in Laue's 1912 paper
Laue's grave in the Stadtfriedhof
Deutsche Post (der DDR) Briefmarke (postage stamp), 1979
Aqua regia
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Aqua regia is a mixture of nitric acid and hydrochloric acid, optimally in a molar mixing ratio of 1:3. Aqua regia is a fuming liquid. Freshly prepared aqua regia is colorless, but it turns yellow, or
Max von Laue
…When Germany invaded Denmark in World War II, the Hungarian chemist George de Hevesy dissolved the Nobel Prize gold medals of Laue and James Franck in aqua regia to prevent the Nazis from discovering them. At the time, it was illegal to take gold out of the country, and if it had been discovered that Laue had…
Freshly prepared aqua regia to remove metal salt deposits
Freshly prepared aqua regia is colorless, but it turns orange within seconds. Here, fresh aqua regia has been added to these NMR tubes to remove all traces of organic material.
Pure gold precipitate produced by the aqua regia chemical refining process
Initial state of the transformation.