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Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars. ... Copper: 8.96: 60 (1.662 × 10 18 ... Rhenium: 21.02: 7×10 −4 (1.939 ...
Because of the low availability relative to demand, rhenium is expensive, with price reaching an all-time high in 2008–09 of US$10,600 per kilogram (US$4,800 per pound). As of 2018, its price had dropped to US$2,844 per kilogram (US$1,290 per pound) due to increased recycling and a drop in demand for rhenium catalysts. [12]
Because of the low availability relative to demand, rhenium is among the most expensive industrial metals, with an average price exceeding US$6,000 per kilogram, as of mid-2009. It first traded in 1928 at US$10,000 per kilogram of metal, but traded at US$250 per Troy ounce in mid-2010. [82] It traded in July 2010, at about US$4,000–4,500/kg. [83]
Some primary stocks of rare but useful metals are already running low. For example, rhenium only occurs at seven parts per billion in the Earth’s crust, making it one of the rarest elements on the planet. However, its high melting point of 3,186 °C makes it valuable in the manufacture of jet engines.
One of the largest bullion coins in the world was the 10,000-dollar Australian Gold Nugget coin minted in Australia, which consists of a full kilogram of 99.9% pure gold. In 2012, the Perth Mint produced a 1-tonne coin of 99.99% pure gold with a face value of $ 1 million AUD, making it the largest minted coin in the world with a gold value of ...
Kudriavy discharges up to 20–60 kg rhenium per year mostly in the form of rhenium disulfide. [100] [101] Named rheniite, this rare mineral commands high prices among collectors. [102] Ammonium perrhenate. Most of the rhenium extracted comes from porphyry molybdenum deposits. [103] These ores typically contain 0.001% to 0.2% rhenium. [6]
Rhenium(VI) oxide has an appearance similar to that of copper. Rhenium(IV) oxide (or rhenium dioxide) is an oxide of rhenium, with the formula ReO 2. This gray to black crystalline solid is a laboratory reagent that can be used as a catalyst. It adopts the rutile structure. It forms via comproportionation: [4] 2 Re 2 O 7 + 3 Re → 7 ReO 2
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