No higher resolution available. tullahomaradio.com ( × pixels, file size: 4 KB, MIME type: image/png). File information. Structured data. Platinum Symbol Dateiversionen. Platin ist ein chemisches Element mit dem Elementsymbol Pt und der Ordnungszahl Es besitzt eine hohe. Suchen Sie nach Platinum Symbol-Stockbildern in HD und Millionen weiteren lizenzfreien Stockfotos, Illustrationen und Vektorgrafiken in der.
prism online casinoFinden Sie perfekte Stock-Fotos zum Thema Platinum Symbol sowie redaktionelle Newsbilder von Getty Images. Wählen Sie aus erstklassigen Inhalten. No higher resolution available. tullahomaradio.com ( × pixels, file size: 4 KB, MIME type: image/png). File information. Structured data. Platin ist ein chemisches Element im Periodensystem der Elemente mit dem Symbol Pt und der Ordnungszahl Platin ist ein schweres, schmiedbares.
Platinum Symbol Platinum Content Marks VideoBlue Nile - Jewelry Education, Platinum
Category: Alchemical Symbols. Platinum is part of the Mundane Elements group. Edit this symbol. Alchemical symbols, originally devised as part of alchemy, were used to denote some elements and some compounds until the 18th century.
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Co-authored by:. Co-authors: Updated: February 5, Categories: Authenticating Jewelry. Article Summary X If you want to identify whether a piece of jewelry is platinum or silver, first examine the jewelry for any etchings in the metal.
Italiano: Riconoscere Gioielli di Platino e d'Argento. Deutsch: Bestimmen ob ein Schmuckstück aus Platin oder Silber ist. Nederlands: Sieraden van platina en zilver herkennen.
Thanks to all authors for creating a page that has been read , times. Donna C Aug 27, I used the peroxide test, and unfortunately, no bubbles.
So to verify I was doing it the right way, I tried a couple of my rings and the silver ones bubbled almost immediately.
Thank you for the easiest, safest test. Rated this article:. Maggie Mae Oct 8, Helped me to understand markings on my jewellery and I looked up the makers and found who made the Jewellery.
Very informative. Lucylulu Magoo Jul 20, I thought it was white gold and your article confirmed this. Jo Anne Collins-Hatcher Apr 4, Wayne Dowdy Feb Great article!
Alan Day Aug 2, Deena Moore Jul 21, Anonymous Sep 8, Becky Elliott Arwood Apr 29, Anonymous Apr 11, Anonymous Apr 22, Gladys Meacock Oct 5, Anonymous Jul 30, Please choose another time period or contract.
Still have questions? Please Contact Us! Video not supported! All rights reserved. According to the FTC, it is unlawful to use the word "platinum," or the names of any of the other PGM metals or their abbreviations, to describe a ring if the marking or description misrepresents the product's true composition.
Misleading marks include: using "Platinum," "Plat," or "Pt. Hernandez has covered real estate topics since She is a licensed real estate salesperson in San Diego since The symbol incorporates the signs of the sun and moon, associated with these metals.
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,  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.This article provides a list of platinum stocks which have generated the highest returns in the year till date of writing. The list is prepared based on the percentage returns generated by the individual platinum stocks between the end of the previous and Dec 3, , and the top 10 return generating platinum stocks are listed below. Symbol: Pt; atomic no: 78; atomic wt: ; valency: 1–4; relative density: ; melting pt: °C; boiling pt: ±°C a medium to light grey colour (as adjective) a platinum carpet. Platinum is a chemical element with the symbol Pt and atomic number It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name is derived from the Spanish term platino, meaning "little silver". Platinum is a member of the platinum group of elements and group 10 of the periodic table of elements. Platinum is a chemical element with the chemical symbol Pt and an atomic number of 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. Platinum has six naturally occurring isotopes. Platinum Symbol. Quote Reply # Jun 01 at PM Rating: Decent __DEL__ 12 posts. any one have a clue who drops this one? Page top. Post Comment. Words nearby platinum platinocyanideplatinoidPlatinolplatinotypeplatinousplatinumplatinum blackplatinum-blondplatinum blondeplatinum discplatinum metal. As a member of the platinum group of elements, as well as of the group 10 of the periodic table of elements, platinum is generally non-reactive. Main articles: Platinum as an investment and Platinum coin.