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gilleain
on Feb 7, 2023
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U-Bahn station in Berlin is decorated with radioac...
Specifically, Uranium Oxide (UO2, I guess? Or maybe the trioxide?):
https://blog.colornavigator.net/dangerous-colors
https://en.wikipedia.org/wiki/Uranium_trioxide
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Search:
https://blog.colornavigator.net/dangerous-colors
https://en.wikipedia.org/wiki/Uranium_trioxide