Difference between revisions of "Gallium"
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== Description == | == Description == | ||
| − | A rare metallic element that occurs naturally in small amounts in the [ | + | A rare metallic element that occurs naturally in small amounts in the [[copper sulfide]] ore germanite, the aluminum oxide ore [[bauxite]], and in some [[zinc]] ores. Discovered in 1875, gallium is a grayish metal that is a liquid at temperatures slightly above ambient. It is used in solar batteries and as a semiconductor in [[laser]] diodes. Radioactive gallium is used in medical imaging particularly for bone cancer. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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Ga; gallio (It.); Gálio (Port.); galio (Esp.) | Ga; gallio (It.); Gálio (Port.); galio (Esp.) | ||
| − | == | + | == Risks == |
| + | |||
| + | * Combustible at 500C. | ||
| + | * Sensitive to moisture. | ||
| + | * Inhalation causes irritation. | ||
| + | * Fisher Scientific: [https://fscimage.fishersci.com/msds/99088.htm MSDS] | ||
| + | |||
| + | ==Physical and Chemical Properties== | ||
Soluble in aqua regia and some alkali. Slightly soluble in mercury. | Soluble in aqua regia and some alkali. Slightly soluble in mercury. | ||
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! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 29.78 | + | | 29.78 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 5.907 | + | | 5.907 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
| Line 29: | Line 36: | ||
|- | |- | ||
! scope="row"| Boiling Point | ! scope="row"| Boiling Point | ||
| − | | 2403 | + | | 2403 C |
|} | |} | ||
| − | == | + | ==Resources and Citations== |
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| − | + | * Web Elements: [http://www.webelements.com/webelements/elements/text/Ga/key.html Website] | |
* 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 | ||
| − | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "Gallium." | + | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "Gallium." Accessed 9 Sept. 2004. |
* ''Chemical & Engineering News'', American Chemical Society, Washington DC, 81 (36) , Sept. 8, 2003 Comment: Oliver Sacks, "Gallium" p. 88 | * ''Chemical & Engineering News'', American Chemical Society, Washington DC, 81 (36) , Sept. 8, 2003 Comment: Oliver Sacks, "Gallium" p. 88 | ||
Latest revision as of 11:25, 25 July 2022
Description
A rare metallic element that occurs naturally in small amounts in the Copper sulfide ore germanite, the aluminum oxide ore Bauxite, and in some Zinc ores. Discovered in 1875, gallium is a grayish metal that is a liquid at temperatures slightly above ambient. It is used in solar batteries and as a semiconductor in Laser diodes. Radioactive gallium is used in medical imaging particularly for bone cancer.
Synonyms and Related Terms
Ga; gallio (It.); Gálio (Port.); galio (Esp.)
Risks
- Combustible at 500C.
- Sensitive to moisture.
- Inhalation causes irritation.
- Fisher Scientific: MSDS
Physical and Chemical Properties
Soluble in aqua regia and some alkali. Slightly soluble in mercury.
| Composition | Ga (atomic no. 31) |
|---|---|
| CAS | 7440-55-3 |
| Melting Point | 29.78 C |
| Density | 5.907 g/ml |
| Molecular Weight | atomic wt=69.72 |
| Boiling Point | 2403 C |
Resources and Citations
- Web Elements: Website
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Encyclopedia Britannica, http://www.britannica.com Comment: "Gallium." Accessed 9 Sept. 2004.
- Chemical & Engineering News, American Chemical Society, Washington DC, 81 (36) , Sept. 8, 2003 Comment: Oliver Sacks, "Gallium" p. 88
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998