Chemical elements
  Palladium
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Palladous Fluoride
      Palladous Chloride
      Dichlor-palladous Acid
      Tetrachlor-palladites
      Palladium Trichloride
      Pentachlor-palladates
      Hexachlor-palladates
      Palladous Bromide
      Brom-palladites
      Brom-palladates
      Palladous Iodide
      Palladous Oxide
      Hydrated Palladium Sesquioxide
      Hydrated Palladium Dioxide
      Palladium Subsulphide
      Palladium Monosulphide
      Potassium Thio-palladite
      Palladium Disulphide
      Sodium Thio-palladate
      Palladous Sulphate
      Palladous Selenide
      Palladous Selenate
      Palladous Nitrate
      Palladium Cyanide
      Potassium Palladocyanide
      Palladium Monosilicide
    Catalytic Activity
    Types
    PDB 1ks4-3np2

Palladous Selenide, PdSe






Berzelius found that palladium and selenium unite to form a refractory, grey Palladous Selenide, PdSe when heated together, their union being accompanied with evolution of heat.

Roessler obtained the selenide by igniting palladosammine chloride, PdCl2.2NH3, with half its weight of selenium, using borax as a flux. The product has a metallic appearance, with a fine-grained fracture. It melts at a lower temperature than silver (960° C.) without loss of selenium even in air. It dissolves completely in aqua regia, and serves to illustrate the observation that selenides are usually more readily attacked by acids than the corresponding sulphides.
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