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    Pure Platinum

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    Pure Platinum

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    Pure Platinum

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    Pure Platinum Buy Now From $ While fall is typically synonymous with dark, subdued tones, the Nike Dunk High “Pure Platinum” is a pristine iteration of the classic silhouette for the colder months. Debuting. New Nike Air Max GS Kids Pure Platinum Pink Shoes AQ Size Y. $ Free shipping. The main floor of Pure Platinum is a lively and fun party atmosphere with world-class hospitality and service on each and every visit. We offer a vast selection of bottle service, premium alcohols, and an array of champagnes; available upon request. We also offer free lunch daily with the purchase of a drink!. PURE PLATINUM is a collection of artists that work together to utilize everyone's strong points and knowledge of the current trends and classics. Pure Platinum® MC is a nonprofit organization that was formed to promote skilled motorcycle awareness and to serve as an advocate for motorcyclists on related issues and share camaraderie with other enthusiasts throughout the motorcycle community. Pure Platinum - Buy Platinum Jewellery Online in India with the latest jewellery designs from our online jewellery shopping store. Best Platinum Jewellery website for online jewellery shopping in India with Designer Rings, Chains, Bands, Kadas, Pendants, Earings and Bracelets. Pure Platinum offers the perfect balance of fitness, function and wellness classes weekly including strength and cardio, group fitness, group personal training, cycling, kickboxing, pilates, yoga, and meditation. So, go in with the thought that you’re going to accomplish something new . Pure platinum is a lustrous, ductile, and malleable, silver-white metal. Platinum is more ductile than gold, silver or copper, thus being the most ductile of pure metals, but it is less malleable than gold. The metal has excellent resistance to corrosion, is stable at .
    Pure Platinum

    Add Close. Commodity Snapshot 1, Popular Articles Business Insider 1 hrs ago. Business Insider 1 hrs ago. Corona Virus Precautions:. Wash your hands frequently Regularly and thoroughly clean your hands with an alcohol-based hand rub or wash them with soap and water.

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    Email required Address never made public. Name required. Firefighter boxing event! These compounds are capable of crosslinking DNA , and kill cells by similar pathways to alkylating chemotherapeutic agents.

    Archaeologists have discovered traces of platinum in the gold used in ancient Egyptian burials as early as BC.

    For example, a small box from burial of Shepenupet II was found to be decorated with gold-platinum hieroglyphics. It is quite possible they did not recognize there was platinum in their gold.

    The metal was used by pre-Columbian Americans near modern-day Esmeraldas, Ecuador to produce artifacts of a white gold-platinum alloy. Archeologists usually associate the tradition of platinum-working in South America with the La Tolita Culture circa BC - AD , but precise dates and location is difficult, as most platinum artifacts from the area were bought secondhand through the antiquities trade rather than obtained by direct archeological excavation.

    The resulting gold-platinum alloy would then be soft enough to shape with tools. It was often simply thrown away, and there was an official decree forbidding the adulteration of gold with platinum impurities.

    Ulloa and Juan found mines with the whitish metal nuggets and took them home to Spain. Antonio de Ulloa returned to Spain and established the first mineralogy lab in Spain and was the first to systematically study platinum, which was in His historical account of the expedition included a description of platinum as being neither separable nor calcinable.

    Ulloa also anticipated the discovery of platinum mines. After publishing the report in , Ulloa did not continue to investigate the new metal. In , he was sent to superintend mercury mining operations in Huancavelica.

    In , Charles Wood, [53] a British metallurgist , found various samples of Colombian platinum in Jamaica, which he sent to William Brownrigg for further investigation.

    In , after studying the platinum sent to him by Wood, Brownrigg presented a detailed account of the metal to the Royal Society , stating that he had seen no mention of it in any previous accounts of known minerals.

    In , Henrik Scheffer published a detailed scientific description of the metal, which he referred to as "white gold", including an account of how he succeeded in fusing platinum ore with the aid of arsenic.

    Scheffer described platinum as being less pliable than gold, but with similar resistance to corrosion. Carl von Sickingen researched platinum extensively in He succeeded in making malleable platinum by alloying it with gold, dissolving the alloy in hot aqua regia , precipitating the platinum with ammonium chloride , igniting the ammonium chloroplatinate, and hammering the resulting finely divided platinum to make it cohere.

    Franz Karl Achard made the first platinum crucible in He worked with the platinum by fusing it with arsenic, then later volatilizing the arsenic. Because the other platinum-family members were not discovered yet platinum was the first in the list , Scheffer and Sickingen made the false assumption that due to its hardness—which is slightly more than for pure iron —platinum would be a relatively non-pliable material, even brittle at times, when in fact its ductility and malleability are close to that of gold.

    Their assumptions could not be avoided because the platinum they experimented with was highly contaminated with minute amounts of platinum-family elements such as osmium and iridium , amongst others, which embrittled the platinum alloy.

    Alloying this impure platinum residue called "plyoxen" with gold was the only solution at the time to obtain a pliable compound, but nowadays, very pure platinum is available and extremely long wires can be drawn from pure platinum, very easily, due to its crystalline structure, which is similar to that of many soft metals.

    Chabaneau succeeded in removing various impurities from the ore, including gold, mercury, lead, copper, and iron.

    This led him to believe he was working with a single metal, but in truth the ore still contained the yet-undiscovered platinum-group metals.

    This led to inconsistent results in his experiments. At times, the platinum seemed malleable, but when it was alloyed with iridium, it would be much more brittle.

    Sometimes the metal was entirely incombustible, but when alloyed with osmium, it would volatilize. This started what is known as the "platinum age" in Spain.

    Platinum, along with the rest of the platinum-group metals , is obtained commercially as a by-product from nickel and copper mining and processing.

    During electrorefining of copper , noble metals such as silver, gold and the platinum-group metals as well as selenium and tellurium settle to the bottom of the cell as "anode mud", which forms the starting point for the extraction of the platinum-group metals.

    If pure platinum is found in placer deposits or other ores, it is isolated from them by various methods of subtracting impurities.

    Because platinum is significantly denser than many of its impurities, the lighter impurities can be removed by simply floating them away in a liquid.

    Platinum is paramagnetic , whereas nickel and iron are both ferromagnetic. These two impurities are thus removed by running an electromagnet over the mixture.

    Because platinum has a higher melting point than most other substances, many impurities can be burned or melted away without melting the platinum.

    Finally, platinum is resistant to hydrochloric and sulfuric acids, whereas other substances are readily attacked by them.

    Metal impurities can be removed by stirring the mixture in either of the two acids and recovering the remaining platinum.

    One suitable method for purification for the raw platinum, which contains platinum, gold, and the other platinum-group metals, is to process it with aqua regia , in which palladium, gold and platinum are dissolved, whereas osmium, iridium, ruthenium and rhodium stay unreacted.

    The gold is precipitated by the addition of iron II chloride and after filtering off the gold, the platinum is precipitated as ammonium chloroplatinate by the addition of ammonium chloride.

    Ammonium chloroplatinate can be converted to platinum by heating. The remaining The most common use of platinum is as a catalyst in chemical reactions, often as platinum black.

    It has been employed as a catalyst since the early 19th century, when platinum powder was used to catalyze the ignition of hydrogen.

    Its most important application is in automobiles as a catalytic converter , which allows the complete combustion of low concentrations of unburned hydrocarbons from the exhaust into carbon dioxide and water vapor.

    Platinum is also used in the petroleum industry as a catalyst in a number of separate processes, but especially in catalytic reforming of straight-run naphthas into higher-octane gasoline that becomes rich in aromatic compounds.

    PtO 2 , also known as Adams' catalyst , is used as a hydrogenation catalyst, specifically for vegetable oils. From to , the meter was defined as the length of a platinum-iridium alloy bar, known as the international prototype of the meter.

    The previous bar was made of platinum in Until May , the kilogram was defined as the mass of the international prototype of the kilogram , a cylinder of the same platinum-iridium alloy made in The resistance wire in the thermometer is made of pure platinum e.

    The NIST manufactured the wires from platinum bar stock with a chemical purity of The standard hydrogen electrode also uses a platinized platinum electrode due to its corrosion resistance, and other attributes.

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