#calcium_carbonate__calciumcarbonate  a salt found in nature as chalk or calcite or aragonite or limestone
  supertype:  #salt  a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)
  substance of:  #chalk.calcite  #calcite
  subtype:  #dripstone  the form of calcium carbonate found in stalactites and stalagmites

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