1314-04-1

Hazard Information

Questions And Answer

• Occurrence and Uses

  Nickel sulfide crystalline particles occurs in nature as mineral millerite. Its principal use is as a source material for making nickel metal. ;

• Preparation

  Nickel sulfide crystalline particles is mined directly from natural deposits. Also, it can be prepared in the laboratory by precipitation from an aqueous solution of a nickel salt with ammonium sulfide, (NH4)2S, or by precipitation from an acetic acid solution with hydrogen sulfide. While the aqueous solution method yields an amorphous product (alpha-NiS) which rapidly changes on exposure to air and contact with the solution to a brown crystalline sulfide (beta-NiS), the acid solution method forms only crystalline beta-NiS.
  Nickel sulfide crystalline particles also can be prepared by reacting nickel powder with molten sulfur. ;