Greensand

Description

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.)

Authority

• 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

• Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000