Any of several silicate compounds containing magnesium. For example:
- Magnesium silicate, MgSiO2
- Magnesium metasilicate, MgSiO3, occurs in nature as enstatite and chinoenstatite.
- Magnesium orthosilicate, Mg2SiO4, occurs in nature as forsterite.
These minerals tend to be inert and many are used as a fillers in paints, papers and crayons. They may also be used as fireproofing materials and as abrasives.
Synonyms and Related Terms
magnesium metasilicate; magnesium orthosilicate; magnesium trisilicate; serpentine; hydrous magnesium silicate; silicate de magnésium (Fr;); Magnesiumsilikat (Deut.)
All are insoluble in water and ethanol.
|Refractive Index||MgSiO2=1.651, 1.654, 1.660|
Hazards and Safety
Respirable dust from these minerals is toxic. Noncombustible.
Sources Checked for Data in Record
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 5727
- CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. inde for MgSiO2=1.651, 1.654, 1.660