#sulfide__sulphide  a compound of sulphur and some other element that is more electropositive
  supertype:  #chemical_compound__compound  (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
  substance:  #sulfur
  subtype:  #pyrites  any of various metallic-looking sulfides (of which pyrite is the commonest)
  subtype:  #hydrogen_sulfide  a sulfide having the unpleasant smell of rotten eggs
  subtype:  #iron_disulfide  a compound containing two atoms of sulfur combined with iron
  subtype:  #cadmium_sulfide__cadmiumsulfide  a yellow sulfide used chiefly as a pigment
     subtype:  #zinc_cadmium_sulfide  cadmium sulfide containing zinc

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