Difference between revisions of "Palladium"
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== Description == | == Description == | ||
| − | A silvery-white, metallic element. Palladium occurs in trace amounts in [ | + | A silvery-white, metallic element. Palladium occurs in trace amounts in [[gold]], [[nickel]], [[platinum]], and [[copper]] ores. Palladium was isolated in 1803 by an English chemist named William Hyde Wollaston. It is mined in Siberia, the Ural Mountains, Ontario, and South Africa. Palladium is soft, ductile, and malleable. It is resistant to tarnishing and unaffected by acids and pollutants. Palladium is alloyed with gold to form white gold. It is used for electrical contacts, jewelry, dental crowns, and surgical instruments. |
[[File:24.1728-SC48584.jpg|thumb|]] | [[File:24.1728-SC48584.jpg|thumb|]] | ||
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== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 14:50, 7 July 2014
Description
A silvery-white, metallic element. Palladium occurs in trace amounts in Gold, Nickel, Platinum, and Copper ores. Palladium was isolated in 1803 by an English chemist named William Hyde Wollaston. It is mined in Siberia, the Ural Mountains, Ontario, and South Africa. Palladium is soft, ductile, and malleable. It is resistant to tarnishing and unaffected by acids and pollutants. Palladium is alloyed with gold to form white gold. It is used for electrical contacts, jewelry, dental crowns, and surgical instruments.
Synonyms and Related Terms
Pd; palladium (Fr.); palladio (It.); Paládio (Port.); paladio (Esp.); Palladium (Deut.); palladium (Ned.); paládio (Port.)
| Composition | Pd (atomic no. 46) |
|---|---|
| CAS | 7440-05-3 |
| Mohs Hardness | 4.8 |
| Melting Point | 1554 |
| Density | 12.02 |
| Molecular Weight | atomic wt = 106.4 |
| Boiling Point | 3167 |
Hazards and Safety
Noncombustible except as dust.
Fisher Scientific: MSDS
Additional Information
Web Elements: Website
Authority
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 571
- Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
- Chemical & Engineering News, American Chemical Society, Washington DC, 81 (36) , Sept. 8, 2003 Comment: Larry Overman, p. 116