Difference between revisions of "Tantalum"

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[[File:2006.139-SC177413.jpg|thumb|'''MFA Acc. #:''' 2006.139]]
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[[File:2006.139-SC177413.jpg|thumb|Mixed media necklace<br>MFA# 2006.139]]
 
== Description ==
 
== Description ==
  
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A bluish-gray metallic element. Tantalum was recognized as an element by Anders Ekeberg, a Swedish chemist, in 1802 but not isolated as a pure metal until 1907 by von Bolton. It occurs in nature with [http://cameo.mfa.org/materials/fullrecord.asp?name=niobium niobium] in minerals such as columbite, tantalite, and microlite and is mined primarily in western Australia, Manitoba and South Dakota. Tantalum is a hard, ductile metal that can be drawn into thin wires. Tantalum is used to make lightbulb filaments, electronic capacitors, pen nibs, surgical instruments, sutures and pins in broken bones. Tantalum oxide is used to make a high quality glass for telescope and camera lenses.
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A bluish-gray metallic element. Tantalum was recognized as an element by Anders Ekeberg, a Swedish chemist, in 1802 but not isolated as a pure metal until 1907 by von Bolton. It occurs in nature with [[niobium|niobium]] in minerals such as columbite, tantalite, and microlite and is mined primarily in western Australia, Manitoba and South Dakota. Tantalum is a hard, ductile metal that can be drawn into thin wires. Tantalum is used to make lightbulb filaments, electronic capacitors, pen nibs, surgical instruments, sutures and pins in broken bones. Tantalum oxide is used to make a high quality glass for telescope and camera lenses.
  
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
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Ta; Tantaal (Ned.); tantale (Fr.); Tantal (Deut., Sven., Pol.); tantalio (It.); Tântalo (Port.); tántalo (Esp.)
 
Ta; Tantaal (Ned.); tantale (Fr.); Tantal (Deut., Sven., Pol.); tantalio (It.); Tântalo (Port.); tántalo (Esp.)
  
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== Other Properties ==
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== Risks ==
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* Dust or powder may be flammable.
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* Toxic by inhalation.
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* Rembar: [https://www.rembar.com/wp-content/uploads/2019/12/SDS-Tantalum.pdf SDS]
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== Physical and Chemical Properties ==
  
 
Resistant to acids, ammonium hydroxide, sea water, chloride salts and sulfurous atmospheres.
 
Resistant to acids, ammonium hydroxide, sea water, chloride salts and sulfurous atmospheres.
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|-
 
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! scope="row"| Melting Point
 
! scope="row"| Melting Point
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| 2996
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| 2996 C
 
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! scope="row"| Density
 
! scope="row"| Density
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| 14.5-16.6
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| 14.5-16.6 g/ml
 
|-
 
|-
 
! scope="row"| Molecular Weight
 
! scope="row"| Molecular Weight
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|-
 
|-
 
! scope="row"| Boiling Point
 
! scope="row"| Boiling Point
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| 5425-5427
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| 5425-5427 C
 
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|}
  
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== Hazards and Safety ==
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==Resources and Citations==
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Dust or powder may be flammable. Toxic by inhalation.
 
  
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Sigma Chemical: [http://hazard.com/msds/f2/byl/bylnf.html MSDS]
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* Web Elements: [http://www.webelements.com/webelements/elements/text/Ta/key.html Website] - states discovered by Ekeberg in 1802 and von Bolton first purified tantalum in 1907
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== Additional Information ==
 
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Web Elements: [http://www.webelements.com/webelements/elements/text/Ta/key.html Website]
 
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== Authority ==
 
  
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 798
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 798
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* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 9223;  discovered by Ekeberg in 1802 and first purified by Bolton
 
* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 9223;  discovered by Ekeberg in 1802 and first purified by Bolton
  
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* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "tantalum" Encyclopædia Britannica Premium Service. [Accessed 28 Sept. 2005].
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* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "tantalum" [Accessed 28 Sept. 2005].
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* Website address 1  Comment: Web Elements at http://www.webelements.com/webelements/elements/text/Ta/hist.html states discovered by Ekeberg in 1802 and von Bolton first purified tantalum in 1907
 
  
 
* ''Chemical & Engineering News'', American Chemical Society, Washington DC, 81 (36) , Sept. 8, 2003  Comment: Richard Schrock, p. 140: discovered in 1802 by Swedish chemist Anders Gustav Ekeberg
 
* ''Chemical & Engineering News'', American Chemical Society, Washington DC, 81 (36) , Sept. 8, 2003  Comment: Richard Schrock, p. 140: discovered in 1802 by Swedish chemist Anders Gustav Ekeberg
  
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* Wikipedia, the free encyclopedia, at http://www.wikipedia.com  Comment: http://en.wikipedia.org/wiki/Tantalum (Accessed Sept. 28, 2005)
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* Wikipedia: http://en.wikipedia.org/wiki/Tantalum (Accessed Sept. 28, 2005)
  
 
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
 
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993

Latest revision as of 07:01, 8 June 2022

Mixed media necklace
MFA# 2006.139

Description

A bluish-gray metallic element. Tantalum was recognized as an element by Anders Ekeberg, a Swedish chemist, in 1802 but not isolated as a pure metal until 1907 by von Bolton. It occurs in nature with Niobium in minerals such as columbite, tantalite, and microlite and is mined primarily in western Australia, Manitoba and South Dakota. Tantalum is a hard, ductile metal that can be drawn into thin wires. Tantalum is used to make lightbulb filaments, electronic capacitors, pen nibs, surgical instruments, sutures and pins in broken bones. Tantalum oxide is used to make a high quality glass for telescope and camera lenses.

Synonyms and Related Terms

Ta; Tantaal (Ned.); tantale (Fr.); Tantal (Deut., Sven., Pol.); tantalio (It.); Tântalo (Port.); tántalo (Esp.)

Risks

  • Dust or powder may be flammable.
  • Toxic by inhalation.
  • Rembar: SDS

Physical and Chemical Properties

Resistant to acids, ammonium hydroxide, sea water, chloride salts and sulfurous atmospheres.

Composition Ta (atomic no. 73)
CAS 7440-25-7
Mohs Hardness 6.5
Melting Point 2996 C
Density 14.5-16.6 g/ml
Molecular Weight atomic wt = 180.9479
Refractive Index 2.05
Boiling Point 5425-5427 C

Resources and Citations

  • Web Elements: Website - states discovered by Ekeberg in 1802 and von Bolton first purified tantalum in 1907
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 798
  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976 Comment: pure form of tantalum made by Berzelius in 1820
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9223; discovered by Ekeberg in 1802 and first purified by Bolton
  • Chemical & Engineering News, American Chemical Society, Washington DC, 81 (36) , Sept. 8, 2003 Comment: Richard Schrock, p. 140: discovered in 1802 by Swedish chemist Anders Gustav Ekeberg
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998

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