View Single Post
Old 17-08-2012, 11:44 PM   #116
lightgiver
Senior Member
 
Join Date: Apr 2008
Location: Inactive
Posts: 36,483
Likes: 237 (190 Posts)
Lightbulb Platinum

Platinum is a chemical element with the chemical symbol Pt and an atomic number of 78...Platinum is a precious metal commodity; its bullion has the ISO currency code of XPT. Coins, bars, and ingots are traded or collected. Platinum finds use in jewelry, usually as a 90–95% alloy, due to its inertness and shine...The frame of the Crown of Queen Elizabeth the Queen Mother, manufactured for her coronation as Consort of King George VI, is made of platinum. It was the first British crown to be made of this particular metal...

This alchemical symbol for platinum was made by joining the symbols of silver and gold...



Its name is derived from the Spanish term platina, which is literally translated into "little silver". It is a dense, malleable, ductile, precious, gray-white transition metal...Of the 245 tonnes of platinum sold in 2010, 113 tonnes were used for vehicle emissions control devices (46%), 76 tonnes for jewelry (31%). The remaining 35.5 tonnes went to various other minor applications, such as investment, electrodes, anticancer drugs, oxygen sensors, spark plugs and turbine engines...In the 18th century, platinum's rarity made King Louis XV of France declare it the only metal fit for a king...
Quote:
[8/16/2012] South African riot police opened fire on striking miners armed with machetes and sticks at Lonmin's Marikana platinum mine...
Platinum exists in higher abundances on the Moon and in meteorites. Correspondingly, platinum is found in slightly higher abundances at sites of bolide impact on the Earth that are associated with resulting post-impact volcanism, and can be mined economically; the Sudbury Basin is one such example.According to the Centers for Disease Control and Prevention, short-term exposure to platinum salts may cause irritation of the eyes, nose, and throat, and long-term exposure may cause both respiratory and skin allergies.For example, in the United States, a musical album that has sold more than 1 million copies, will be credited as "platinum", whereas an album that sold more than 10 million copies will be certified as "diamond"...


http://www.davidicke.com/forum/showt...=65232&page=51
http://www.davidicke.com/forum/showp...0&postcount=66

Last edited by lightgiver; 18-08-2012 at 02:47 AM.
lightgiver is offline   Reply With Quote