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The platinum-group metals (PGMs), also known as the platinoids, platinides, platidises, platinum group, platinum metals, platinum family or platinum-group elements (PGEs), are six noble, precious metallic elements clustered together in the periodic table. These elements are all transition metals in the d-block (groups 8, 9, and 10, periods 5 ...
It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish platina, a diminutive of plata "little silver". [ 6 ][ 7 ] Platinum is a member of the platinum group of elements and group 10 of the periodic table of elements.
Platinum–iridium alloy. The international prototype of the kilogram (IPK) is an artifact standard of platinum–iridium alloy that was defined as having a mass of exactly one kilogram. Platinum–iridium alloys are alloys of the platinum group precious metals platinum and iridium. Typical alloy proportions are 90:10 or 70:30 (Pt:Ir).
Costco is again venturing into the precious metals market, expanding its offerings beyond the gold and silver bars it sold to great success. The retail giant now offers 1-ounce platinum bars for ...
Beginning in 1957, the company published the journal Platinum Metals Review with the support of the Rustenburg Platinum Mines. [7] [8] In the 1960s Johnson Matthey formed a subsidiary, Johnson Matthey Bankers (JMB), which took its seat in the London Gold Fixing. In the early 1980s the bank expanded its activities outside the bullion business ...
The only three verifications occurred in 1889, 1948, and 1989. For instance, the US owns five 90% platinum / 10% iridium (Pt‑10Ir) kilogram standards, two of which, K4 and K20, are from the original batch of 40 replicas distributed in 1884. [Note 4] The K20 prototype was designated as the primary national standard of mass for the US. Both of ...
Group 10 element. Group 10, numbered by current IUPAC style, is the group of chemical elements in the periodic table that consists of nickel (Ni), palladium (Pd), platinum (Pt), and darmstadtium (Ds). All are d-block transition metals. All known isotopes of darmstadtium are radioactive with short half-lives, and are not known to occur in nature ...
Platinum price 1970-2022 Platinum price 1880–2011 Platinum price 1968–2012. Platinum is traded as an ETF (exchange-traded fund) on the London Stock Exchange under the ticker symbol LSE: PHPT and on the New York Stock Exchange as ticker symbols PPLT and PLTM [13] There are also several ETNs (exchange-traded note) available, [14] some of which are inverse to the price of platinum.
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