▲ 111 r/Radioactivestuff
Antique barium platinocyanide sample
We recently came across this beautiful little bottle from Carlo Erba, Milan, probably dating to the early 1900s.
It appears to contain barium platinocyanide, the fluorescent compound famously used in the screen that allowed Wilhelm Röntgen to discover X-rays in 1895.
The compound isn’t radioactive itself, but it played an important role in the early history of radiation detection.
The original glass stopper and paper label are still intact. I’d love to hear your thoughts on its possible age!
u/theperiodicmuseum — 5 days ago