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NAL Agricultural Thesaurus
U.S. Department of Agriculture
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Concept Breadcrumbs

Research, Technology, Methods > chemical substances > chemical compounds > inorganic compounds > oxides > silica
Preferred Term:

silica

Definition:
Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, quartz, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid.
Concept Schemes:
NALT Core
https://lod.nal.usda.gov/nalt
Broader Concept:
oxides
Narrower Concepts:
Related Concepts:
Entry Terms:
  • silicon dioxide
  • cristobalite
URI:
https://lod.nal.usda.gov/nalt/56445
Download this Concept:
RDF/XMLCreated 2006-01-19, last modified 2018-10-22
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