991. Barium Platinous Cyanide

Nomenclature

CAS number: 562-81-2
Barium tetracyanoplatinate(II); barium cyanoplatinate(II); barium platinocyanide; platinous barium cyanide.
C4BaN4Pt; mol wt 436.48.
C 11.01%, Ba 31.46%, N 12.84%, Pt 44.69%.
BaPt(CN)4.

Derivative

Tetrahydrate.

Properties

Large dichroic crystals; yellowish-green by transmitted, bluish-violet by reflected light. Poisonous. d 3.05. Sol in about 35 parts water; more sol in hot water.

Use

An aq soln mixed with some adhesive and painted on paper or wood exhibits luminescence when exposed to the invisible ultraviolet rays of the spectrum or to Roentgen, radium, or cathode rays; hence used in radiography for making x-ray screens.