Great Britain

Great Britain Salt Stamp
Stamp Commemorating Salt Crystallography
from the "British Achievement in Chemistry" Issue of March 2, 1977
to Honour the Centenary of the Royal Institute of Chemistry

Observations of the well-defined shapes of crystals suggested to scientists that the particles of which the crystals were composed must also have a regular pattern to them. In 1912 this was proven and Sir William Henry Bragg and his son Lawrence Bragg figured out the arrangement of particles in common salt. They went on to win the 1915 Nobel Prize in Physics "for their services in the analysis of crystal structure by means of X-rays". The first mineral discovered using x-rays, braggite, is named after them.

Sources

"Braggite". Wikipedia. 12 Jul. 2022. Web. 23 Jan. 2023.
en.wikipedia.org/wiki/Braggite.

"Lawrence Bragg". Wikipedia. 17 Jan. 2023. Web. 23 Jan. 2023.
en.wikipedia.org/wiki/Lawrence_Bragg.

Robey, T.L.T. "Chemicals on Stamps." Gibbons Stamp Monthly. March 1978. Print:67-68.

"William Henry Bragg". Wikipedia. 17 Oct. 2022. Web. 23 Jan. 2023.
en.wikipedia.org/wiki/William_Henry_Bragg.

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