Asbestos

Frae Wikipedia
Jump to navigation Jump to search
Asbestos
Asbestos with muscovite.jpg
Fibrous tremolite asbestos on muscovite
General
Category Meeneral
Strunz clessification 09.ED.15
Dana clessification 71.01.02d.03
Creestal seestem Orthorhombic
Identification
Formula mass 277.11 g
Colour Green, reid, yellae, white, blue
Creestal habit Amorphous, granular, massive
Fractur Fibrous
Mohs scale haurdness 2.5–3
Skinkle Silky
Streak White
Optical properties Biaxial
Birefringence 0.008
2V angle 20° tae 60°
Dispersion relatively weak
Ultraviolet fluorescence Non-fluorescent

Asbestos is a set o sax naiturally occurrin silicate minerals,[1] which aw hae in common thair eponymous asbestiform habit: lang (roughly 1:20 aspect ratio), thin fibrous creestals, wi each veesible feebre componed o millions o microscopic "fibrils" that can be released bi abrasion an ither processes.[2] Thay are commonly kent bi thair colours, as blue asbestos, broun asbestos, white asbestos, an green asbestos.

References[eedit | eedit soorce]

  1. Alleman, James E.; Mossman, Brooke T (July 1997). "Asbestos Revisited" (PDF). Scientific American. 277: 54–57. Bibcode:1997SciAm.277a..70A. doi:10.1038/scientificamerican0797-70. Archived frae the oreeginal (PDF) on 3 June 2010. Retrieved 26 November 2010. 
  2. Gee, David; Greenberg, Morris (9 January 2002). "Asbestos: from 'magic' to malevolent mineral" (PDF). Late lessons from early warnings: the precautionary principle 1896–2000. Copenhagen: EEA (22): 52–63. ISBN 92-9167-323-4. Retrieved 20 April 2010.