Chemical elements
    Physical Properties
    Chemical Properties
      Hypovanadous Oxide
      Vanadous Oxide
      Hypovanadic Oxide
      Vanadic Oxide
      Hypovanadous Fluoride
      Vanadous Fluoride
      Vanadium Tetrafluoride
      Vanadium Pentafluoride
      Vanadyl Difluoride
      Vanadium Oxytrifluoride
      Vanadium Dioxyfluoride
      Hypovanadous Chloride
      Vanadous Chloride
      Hypovanadic Chloride
      Divanadyl Chloride
      Vanadium Oxymonochloride
      Vanadyl Dichloride
      Vanadium Oxytrichloride
      Vanadium Oxydichloride
      Vanadous Bromide
      Hypovanadic Bromide
      Vanadium Oxymonobromide
      Vanadyl Dibromide
      Vanadium Oxytribromide
      Hydrated Vanadium Tri-iodide
      Vanadium Suboxide
      Hypovanadous Oxide
      Vanadous Oxide
      Hypovanadic Oxide
      Intermediate Vanadium Oxides
      Vanadium Pentoxide
      Sodium Stannovanadates
      Double Vanadates
      Heteropoly-Acids with Vanadium
      Pervanadic Acid
      Vanadium Monosulphide
      Vanadium Trisulphide
      Vanadium Pentasulphide
      Vanadium Oxysulphides
      Hypovanadous Sulphate
      Vanadous Sulphate
      Vanadyl Sulphites
      Vanadyl Sulphates
      Vanadic Sulphates
      Vanadyl Dithionate
      Ammonium Orthothiovanadate
      Ammonium Pyroxyhexathiovanadate
      Sodium Orthoxytrithiovanadate
      Sodium Orthoxymonothiovanadate
      Vanadium Selenides
      Vanadyl Selenite
      Vanadyl Selenates
      Vanadium Subnitride
      Vanadium Mononitride
      Vanadium Dinitride
      Alkali Vanadyl Nitrites
      Vanadium Nitrates
      Vanadyl Hypophosphite
      Vanadyl Phosphates
      Vanadous Pyrophosphate
      Vanadyl Arsenates
      Vanadium Carbide
      Vanadyl Cyanide
      Potassium Vanadocyanide
      Potassium Vanadicyanide
      Vanadium Ferrocyanides
      Ammonium Vanadyl Thiocyanate
      Vanadium Subsilicide
      Vanadium Disilicide
      Vanadium Boride
    Detection, Estimation
    PDB 1b8j-2i4e
    PDB 2jhr-6rsa

Vanadium Monosulphide, VS

The lowest oxide of vanadium which can be obtained by the reducing action of hydrogen is vanadium trioxide, V2O3. In the case of the sulphides, however, the reducing action of hydrogen appears to proceed still further, notwithstanding the fact that hydrogen sulphide is a much less stable compound at a red heat than water-vapour. By passing hydrogen over heated vanadium trisulphide, V2S3, at 1100° to 1200° C. for from four to eight days, the monosulphide, VS, has been obtained. Wedekind and Horst, however, were unable to obtain any of the sulphide by this method, but found that it resulted, more or less impure, from the action of hydrogen sulphide on hypovanadous oxide, VO. Vanadium monosulphide forms either glistening, black scales, of density 4.2, or a brownish-black, amorphous powder, density 4.4. Its magnetic susceptibility has been studied. On being heated in air it absorbs oxygen readily with formation of vanadium pentoxide and evolution of sulphur dioxide. It is attacked only very slightly by boiling hydrochloric acid, both strong and dilute, and boiling dilute sulphuric acid; hot concentrated sulphuric acid dissolves it slowly, while nitric acid, strong or dilute, attacks it readily. It is soluble in colourless ammonium sulphide, giving a purple solution, and in yellow ammonium sulphide, yielding a wine-red solution. Caustic soda and ammonium hydroxide have a slight solvent action on the sulphide.

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