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Platinum - Papers

Platinum

, symbol Pt, is a relatively rare, chemically inert metallic
element that is more expensive than gold. The atomic number of is
78. is one of the transition elements in group 10 of the periodic
table. is the most important of the group of elements called the
metals, also included in this group is the metals: ruthenium,
rhodium, palladium, osmium, and iridium. Platinum metals were probably
used in alloyed forms in ancient Greece and Rome and were first mentioned
in European literature in the early 16th century. The separation of the
other platinum metals from platinum and from each other was accomplished in
the early 19th century.

An Italian scientist, Julius Scaliger, discovered ...

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ruthenium. The grains also
contain small amounts of iron, copper, chromium, and titanium. A large
nugget of platinum will be found only on occasion, like in 1843, a lump
weighing over 21 pounds was found in Russia. Russia produces the worlds
largest share of platinum-group metals. Other important sources of
platinum are located in the Transvaal province in South Africa and in
Sudbury, Ont. Colombia and the United States also have sources of platinum.
The United States uses about 475,000 troy ounces of platinum a year. About
1/5 of this comes from its own mines and from scrap. The rest is imported
largely from Canada, which recovers large quantities as a byproduct of the
nickel industry. In the United States, platinum is found in the gold
deposits in California, Nevada, and Oregon. Large amounts also come from
the process of refining gold and copper.

Platinum is a silverish metal with a hardness of 4.3. It has a high fusing
point, is malleable and ductile, it doesn't ...

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PAPER DETAILS

Added: 3/24/2004 05:33:17 PM
Category: Science & Nature
Type: Premium Paper
Words: 640
Pages: 3

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