abstract:A platinocyanide is a salt containing the anion Pt(CN)42-. Barium platinocyanide, BaPt(CN)4, was important in the discovery of X-rays, and in the development of the fluoroscope.
In 1895, Wilhelm Roentgenaccidentallydiscovered that a cathode-ray tube couldmakea sheet of paper coated with bariumplatinocyanideglow, evenwhen the tube and the paper werein separaterooms.