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As of 2020, the most expensive non- synthetic element by both mass and volume is rhodium. It is followed by caesium, iridium and palladium by mass and iridium, gold and platinum by volume. Carbon in the form of diamond can be more expensive than rhodium. Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars.
As of 21 November 2022, the platinum spot price in New York was $980 per ounce, compared to $1,742 per ounce for gold and $20.84 per ounce for silver. Platinum is traded in the spot market with the code "XPT". When settled in United States dollars, the code is "XPTUSD". As the cost of platinum per ounce fell, the cost per ounce for other metals ...
Platinum is a member of the platinum group of elements and group 10 of the periodic table of elements. It has six naturally occurring isotopes. It is one of the rarer elements in Earth's crust, with an average abundance of approximately 5 μg /kg. It occurs in some nickel and copper ores along with some native deposits, mostly in South Africa ...
Rank Country/Region Platinum production (kilograms) Year World 180,000 2019 1: South Africa: 130,000 2019 2: Russia: 22,000 2019 3: Zimbabwe: 15,000 2019 4: Canada
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).
Platinum. 999.95: what most dealers would buy as if 100% pure; the most common purity for platinum bullion coins and bars; 999—three nines fine; 950: the most common purity for platinum jewelry; 900—one nine fine; 850; 750; Gold 1 troy ounce of four nines fine gold (999.9) 999.999—six nines fine: The purest gold ever produced.
The International Prototype of the Kilogram (referred to by metrologists as the IPK or Le Grand K; sometimes called the ur -kilogram, [1] [2] or urkilogram, [3] particularly by German-language authors writing in English [3] [4]: 30 [5] : 64 ) is an object whose mass was used to define the kilogram from 1889, when it replaced the Kilogramme des ...
The coin had a face value of 100 Estonian kroons, a platinum purity of 999/1000, a weight of 7.775 grams, and a diameter of 18.0 mm. The coin was designed by Tiit Jϋrna and produced by the Mint of Finland with a quantity of 3,000 pieces.