Difference between revisions of "Mica"

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[[File:13.4284-E3977CR-d1.jpg|thumb|]]
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[[File:13.4284-E3977CR-d1.jpg|thumb|Mica appliques<br>MFA# 13.4284]]
 
== Description ==
 
== Description ==
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[[File:41.262-C43305CR-d1.jpg|thumb|Japanese print<br>MFA# 41.262]]
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A group of silicate minerals that cleave into thin, flexible sheets. Mica minerals range in color from colorless to black. They are composed of potassium aluminum silicates ([[muscovite|muscovite]]) and may also contain magnesium ([[phlogopite|phlogopite]]), chromium ([[fuchsite|fuchsite]]), iron ([[biotite|biotite]]), and lithium ([[lepidolite|lepidolite]]). Mica is mined commercially in India, Canada, Malagasy Republic, Brazil, and Argentina. Ground mica is used in paper, paints, and ceramic glazes to increase gloss and add sparkle. It has been used as a replacement for bronze powder in some metallic paints. Mica is also used as a filler in plastics, wallboard, mortar, and asphalt shingles. Sheets of mica were at one time used as small windows for houses ([[Muscovy%20glass|Muscovy glass]]); now thin sheets are used as windows in electrical equipment. It is also used as a fireproofing material, an agent in fire extinguishers, and as an electrical insulator.
  
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A group of silicate minerals that cleave into thin, flexible sheets. Mica minerals range in color from colorless to black. They are composed of potassium aluminum silicates ([http://cameo.mfa.org/materials/fullrecord.asp?name=muscovite muscovite]) and may also contain magnesium ([http://cameo.mfa.org/materials/fullrecord.asp?name=phlogopite phlogopite]), chromium ([http://cameo.mfa.org/materials/fullrecord.asp?name=fuchsite fuchsite]), iron ([http://cameo.mfa.org/materials/fullrecord.asp?name=biotite biotite]), and lithium ([http://cameo.mfa.org/materials/fullrecord.asp?name=lepidolite lepidolite]). Mica is mined commercially in India, Canada, Malagasy Republic, Brazil, and Argentina. Ground mica is used in paper, paints, and ceramic glazes to increase gloss and add sparkle. It has been used as a replacement for bronze powder in some metallic paints. Mica is also used as a filler in plastics, wallboard, mortar, and asphalt shingles. Sheets of mica were at one time used as small windows for houses ([http://cameo.mfa.org/materials/fullrecord.asp?name=Muscovy%20glass Muscovy glass]); now thin sheets are used as windows in electrical equipment. It is also used as a fireproofing material, an agent in fire extinguishers, and as an electrical insulator.
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[[File:Mica necklace.jpg|thumb|Mica chain<br>MFA# 2006.414]]
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[[File:41.262-C43305CR-d1.jpg|thumb|]]
 
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  
 
Muscovy glass; isinglass stone; muscovite (colorless); phlogopite (brown); fuchsite (green); lepidolite (pink, lilac); biotite (black); glauconite (green); paragonite; apophyllite; Glimmer (Deut., Sven.); mika (Gr.); micare (Lat.); miki (Pol.); mica (Esp., Fr., It., Ned., Port.);
 
Muscovy glass; isinglass stone; muscovite (colorless); phlogopite (brown); fuchsite (green); lepidolite (pink, lilac); biotite (black); glauconite (green); paragonite; apophyllite; Glimmer (Deut., Sven.); mika (Gr.); micare (Lat.); miki (Pol.); mica (Esp., Fr., It., Ned., Port.);
  
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[[[SliderGallery rightalign|apophyliteRS.jpg~Raman|Muscovite micaj1.jpg~FTIR|PIG607.jpg~XRD|f607sem.jpg~SEM|f607edsbw.jpg~EDS]]]
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[[[SliderGallery rightalign|Kira Mica (607).TIF~FTIR (MFA)|apophyliteRS.jpg~Raman|PIG607.jpg~XRD|f607sem.jpg~SEM|f607edsbw.jpg~EDS|Slide26_F607.PNG~XRF]]]
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== Risks ==
  
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== Other Properties ==
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* May contain silica which could produce silicosis by inhalation.
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* Crystex Composites: [https://crystexcompositesllc.com/wp-content/uploads/2020/01/MM-Synthetic-Mica-SDS-Rev-3_09242019.pdf SDS]
  
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Tetragonal system with tabular, cube-like or prismatic crystals.   
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== Physical and Chemical Properties ==
  
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Perfect cleavage in one direction.  Fracture = uneven.  Luster = pearly, iridescent.  Streak = white to colorless
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* Tetragonal system with tabular, cube-like or prismatic crystals.   
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* Perfect cleavage in one direction.   
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* Fracture = uneven.   
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* Luster = pearly, iridescent.   
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* Streak = white to colorless
  
 
{| class="wikitable"
 
{| class="wikitable"
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|-
 
|-
 
! scope="row"| Density
 
! scope="row"| Density
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| 2.7-3.2
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| 2.7-3.2 g/ml
 
|-
 
|-
 
! scope="row"| Refractive Index
 
! scope="row"| Refractive Index
 
| 1.563; 1.604; 1.599
 
| 1.563; 1.604; 1.599
 
|}
 
|}
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== Hazards and Safety ==
 
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May contain silica which could produce silicosis by inhalation.
 
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Buckeye Fire Equipment: [http://hazard.com/msds/f2/cjw/cjwdc.html MSDS]
 
  
 
== Additional Images ==
 
== Additional Images ==
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File:Image3_802434.jpg|Mica
 
File:Image3_802434.jpg|Mica
 
File:Muskovit-Pilsak.jpg|Mica (muscovite)
 
File:Muskovit-Pilsak.jpg|Mica (muscovite)
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File:Kiramica C100x.jpg|Kira mica, powdered
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File:Kiramica C100x.jpg|Kira mica, powdered at 100x (visible light left; UV light right)
 
File:pa20607apophylite.jpg|Apophylite
 
File:pa20607apophylite.jpg|Apophylite
 
File:fuchsiteF5.jpg|Fuchsite
 
File:fuchsiteF5.jpg|Fuchsite
 
</gallery>
 
</gallery>
  
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== Resources and Citations ==
  
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== Authority ==
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* ''Encyclopedia Britannica'', http://www.britannica.com  Retrieved June 5, 2003.
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* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: Retrieved June 5, 2003, from Encyclopædia Britannica Premium Service.
 
  
 
* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966
 
* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966
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* Robert Fournier, ''Illustrated Dictionary of Practical Pottery'', Chilton Book Company, Radnor, PA, 1992
 
* Robert Fournier, ''Illustrated Dictionary of Practical Pottery'', Chilton Book Company, Radnor, PA, 1992
  
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* Wikipedia, the free encyclopedia, at http://www.wikipedia.com  Comment: http://en.wikipedia.org/wiki/Mica (Accessed Sept. 10, 2005)
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* Wikipedia: http://en.wikipedia.org/wiki/Mica (Accessed Sept. 10, 2005)
  
 
* Michael McCann, ''Artist Beware'', Watson-Guptill Publications, New York City, 1979
 
* Michael McCann, ''Artist Beware'', Watson-Guptill Publications, New York City, 1979

Latest revision as of 12:17, 21 September 2022

Mica appliques
MFA# 13.4284

Description

Japanese print
MFA# 41.262

A group of silicate minerals that cleave into thin, flexible sheets. Mica minerals range in color from colorless to black. They are composed of potassium aluminum silicates (Muscovite) and may also contain magnesium (Phlogopite), chromium (Fuchsite), iron (Biotite), and lithium (Lepidolite). Mica is mined commercially in India, Canada, Malagasy Republic, Brazil, and Argentina. Ground mica is used in paper, paints, and ceramic glazes to increase gloss and add sparkle. It has been used as a replacement for bronze powder in some metallic paints. Mica is also used as a filler in plastics, wallboard, mortar, and asphalt shingles. Sheets of mica were at one time used as small windows for houses (Muscovy glass); now thin sheets are used as windows in electrical equipment. It is also used as a fireproofing material, an agent in fire extinguishers, and as an electrical insulator.

Mica chain
MFA# 2006.414

Synonyms and Related Terms

Muscovy glass; isinglass stone; muscovite (colorless); phlogopite (brown); fuchsite (green); lepidolite (pink, lilac); biotite (black); glauconite (green); paragonite; apophyllite; Glimmer (Deut., Sven.); mika (Gr.); micare (Lat.); miki (Pol.); mica (Esp., Fr., It., Ned., Port.);

FTIR (MFA)

Kira Mica (607).TIF

Raman

ApophyliteRS.jpg

XRD

PIG607.jpg

SEM

F607sem.jpg

EDS

F607edsbw.jpg

XRF

Slide26 F607.PNG

Risks

  • May contain silica which could produce silicosis by inhalation.
  • Crystex Composites: SDS

Physical and Chemical Properties

  • Tetragonal system with tabular, cube-like or prismatic crystals.
  • Perfect cleavage in one direction.
  • Fracture = uneven.
  • Luster = pearly, iridescent.
  • Streak = white to colorless
CAS 12001-26-2
Mohs Hardness 2.0 - 5.0
Density 2.7-3.2 g/ml
Refractive Index 1.563; 1.604; 1.599

Additional Images

  • Mica

  • Mica (muscovite)

  • Kira mica, powdered at 100x (visible light left; UV light right)

  • Apophylite

  • Fuchsite

Resources and Citations

  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 505
  • Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
  • Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
  • Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
  • Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: density=2.6-3.2

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