Barium cuproferrocyanide, BaCu₂Fe(CN)₆

Barium cuproferrocyanide, BaCu₂Fe(CN)₆ and calcium cuproferrocyanide, CaCu₂Fe(CN)₆, are obtained by boiling copper cyanide with the corresponding ferrocyanides. They crystallise in colourless, hexagonal prisms which cannot be distinguished from one another.