Potassium chromicyanide

The banc compound, Pb3[Cr(CN)gj2.5PbO, is obtained as a yellowish-white amorphous precipitate on adding ammoniacal lead acetate solution to a dilute solution of potassium chromicyanide in absence of carbon dioxide. 

Lead Chromicyanide, Pb3[Cr(CN)8l230H2O, is precipitated on the addition of alcohol to a solution of the basic salt in a limited quantity of dilute sulphuric acid. No precipitate is formed when potassium eliromicyanide is added to a solution of lead nitrate, but the basic acetate of lead yields a white precipitate. ... 

Mercury Chromicyanide.— The addition of potassium ehromi-cyanide to a solution of mercurous nitrate gives a yellowish-white precipitate, which rapidly darkens and finally becomes grey. The original precipitate is probably mercurous chromicyanide, Hg3[Cr(CN)g], which decomposes, yielding mercurous cyanide, which in its turn splits up into mercuric cyanide and mercury. 

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See also in sourсe #XX -- [ ]

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