Chemical elements
  Cadmium
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Cadmium Fluoride
      Cadmium Chloride
      Cadmium Bromide
      Cadmium Iodide
      Cadmium Chlorate
      Cadmium Perchlorate
      Cadmium Bromate
      Cadmium Iodate
      Cadmium Periodate
      Cadmium Suboxide
      Cadmium Oxide
      Cadmium Hydroxide
      Cadmic Hydroxide
      Cadmium Peroxide
      Cadmium Sulphide
      Cadmium Sulphite
      Cadmium Sulphate
      Cadmium Thiosulphate
      Cadmium Dithionate
      Cadmium Selenide
      Cadmium Selenites
      Cadmium Selenate
      Cadmium Telluride
      Cadmium Tellurite
      Cadmium Tellurate
      Cadmium Chromite
      Cadmium Chromate
      Cadmium Dichromate
      Cadmium Molybdate
      Cadmium Tungstate
      Cadmium Nitride
      Cadmium Azide
      Cadmium Amide
      Cadmium Nitrite
      Cadmium Nitrate
      Cadmium Phosphide
      Cadmium Hypophosphite
      Cadmium Orthophosphate
      Cadmium Pyrophosphate
      Cadmium Thiophosphates
      Cadmium Arsenide
      Cadmium Arsenite
      Cadmium Arsenates
      Cadmium Metantimonate
      Cadmium Carbonate
      Cadmium Thiocarbonate
      Cadmium Cyanide
      Cadmium Silicate
      Cadmium Borates
    PDB 1a4k-1exq
    PDB 1f48-1ihu
    PDB 1ii0-1mhu
    PDB 1mms-1qvg
    PDB 1qy0-1wb6
    PDB 1wje-2avp
    PDB 2b3p-2j6e
    PDB 2jdz-2x05
    PDB 2x09-3ccj
    PDB 3ccl-3ggf
    PDB 3h1u-3p5v
    PDB 3p5w-8ice

Cadmium Arsenide






The freezing-point, density, and atomic volume curves, supplemented by an examination of the microstructure, confirm the existence of Cd3As2 and CdAs2. Cd3As2 is reddish grey, of density 6.25, and it melts at 721° C. Its hardness is less than 3.5. CdAs2 is bluish grey, of density 5.86, and it melts at 621° C. Its hardness is 3.5–4.0.

Cd3As2 has been prepared by subjecting cadmium and arsenic, in appropriate proportions, to a pressure of 6500 atmospheres. Some Cd6As was formed when cadmium and arsenic were melted together, but Cd3As2 is readily formed by heating cadmium in arsenic vapour mixed with hydrogen or an inert gas. It was thus obtained in reddish octahedra of density 6.211 at 15° C. It reacts with acids and the halogens like the arsenides in general.

Descamps obtained Cd3As by reducing cadmium arsenate with potassium cyanide. It was white, with a slight reddish colour and a metallic lustre.


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