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A naturally occurring green-color sand that contains carbonates and glauconite along with a large percentage of silica, potash, and alumina. Greensand is used for water filtration and water softening because it extracts calcium and magnesium from the water. It is also used as a refractory material in foundries. See also foundry sand.

Synonyms and Related Terms

Glaukonitsand (Deut.)

Sources Checked for Data in Record

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 238
  • Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942