A chemical compound containing platinum and cyanide ions, formed as a complex salt.
From cyano- (blue-green, from cyanide) + platinite (platinum compound). Cyano- comes from Greek kyanos meaning 'dark blue,' and platinite from platinum, named after Spanish plata (silver).
This compound was crucial in early color photography and metal plating industries—the beautiful blue color comes from the cyanide portion, which is toxic but becomes stable when bound to platinum, turning a deadly chemical into something safe and useful.
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