Crocidolite
Description
A fibrous, blue-green mineral composed of sodium iron silicate. Crocidolite is a minor commercial form of asbestos, called blue asbestos. It is found in Europe, Africa, South America and the United States. Crocidolite fibers have a harsh texture. They have fair flexibility and are strong. Crocidolite fibers are used to reinforce polymers and as heat resistant textiles.
Synonyms and Related Terms
blue asbestos; riebeckite; crocidolite (Port.); Krokidolit (Deut.)
Other Properties
Fiber length = 12-300 mm (0.5 - 12 inches) Diameter = 300-350 angstroms. Luster = silky to dull.Cross section is polygonal or circular. Tensile strength = 80,000-200,00 psiResistant to alkalis and acids.
| Mohs Hardness | 4.0 |
|---|---|
| Density | 3.2-3.3 |
Hazards and Safety
Noncombustible. Unaffected by heat.Carcinogenic. Highly toxic by inhalation of dust.Skin contact cause irritation.
Authority
- G.S.Brady, G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
- Richard S. Lewis, Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
- Identification of Textile Materials, The Textile Institute, Manchester, England, 1985
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998