#chromium__Cr__atomic_number_24  a hard brittle blue-white multivalent metallic element; resistant to corrosion and tarnishing
  supertype:  #metallic_element__metal  any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
  substance of:  #chromite
  subtype:  #chrome  another word for chromium when it is used in dyes or pigments

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