Difference between revisions of "Magnesium silicate"

Latest revision as of 14:12, 16 October 2022

Description

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.
Magnesium trisilicate, Mg2Si3O8, occurs in nature as Meerschaum, and Sepiolite.
Serpentine, 3MgSiO3-5H2O, occurs in nature as antigorite and Chrysotile (asbestos).
Hydrous magnesium silicate, Mg3Si4O10(OH)2, occurs in nature as Steatite, and Talc.

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.)

Risks

Respirable dust from these minerals is toxic.
Noncombustible.

Physical and Chemical Properties

All are insoluble in water and ethanol.
Refractive Index = MgSiO2=1.651, 1.654, 1.660

Comparisons

Properties of Common Abrasives

Resources and Citations

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

@@ Line 3: / Line 3: @@
 Any of several silicate compounds containing magnesium. For example:
-- Magnesium silicate, MgSiO2
+* Magnesium silicate, MgSiO2
+* Magnesium metasilicate, MgSiO3, occurs in nature as enstatite and chinoenstatite.
-- Magnesium metasilicate, MgSiO3, occurs in nature as enstatite and chinoenstatite.
+* Magnesium orthosilicate, Mg2SiO4, occurs in nature as forsterite.
+* Magnesium trisilicate, Mg2Si3O8, occurs in nature as [[meerschaum|meerschaum]], and [[sepiolite|sepiolite]].
-- Magnesium orthosilicate, Mg2SiO4, occurs in nature as forsterite.
+* [[Serpentine|Serpentine]], 3MgSiO3-5H2O, occurs in nature as antigorite and [[chrysotile|chrysotile]] (asbestos).
+* Hydrous magnesium silicate, Mg3Si4O10(OH)2, occurs in nature as [[steatite|steatite]], and [[talc|talc]].
-- Magnesium trisilicate, Mg2Si3O8, occurs in nature as [[meerschaum|meerschaum]], and [[sepiolite|sepiolite]].
-- [[Serpentine|Serpentine]], 3MgSiO3-5H2O, occurs in nature as antigorite and [[chrysotile|chrysotile]] (asbestos).
-- Hydrous magnesium silicate, Mg3Si4O10(OH)2, occurs in nature as [[steatite|steatite]], and [[talc|talc]].
 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.
@@ Line 21: / Line 16: @@
 magnesium metasilicate; magnesium orthosilicate; magnesium trisilicate; serpentine; hydrous magnesium silicate; silicate de magnésium (Fr;); Magnesiumsilikat (Deut.)
-== Other Properties ==
+== Risks ==
-All are insoluble in water and ethanol.
+* Respirable dust from these minerals is toxic.
+* Noncombustible.
-{| class="wikitable"
+== Physical and Chemical Properties ==
-|-
-! scope="row"| Refractive Index
-| MgSiO2=1.651, 1.654, 1.660
-|}
-== Hazards and Safety ==
+* All are insoluble in water and ethanol.
+* Refractive Index = MgSiO2=1.651, 1.654, 1.660
-Respirable dust from these minerals is toxic. Noncombustible.
 == Comparisons ==
-[[media:download_file_229.pdf|Properties of Common Abrasives]]
+[[media:download_file_209.pdf|Properties of Common Abrasives]]
-[[media:download_file_230.pdf|Properties of Common Abrasives]]
-== Authority ==
+==Resources and Citations==
 * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993