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They also found rhenium in gadolinite and molybdenite. [5] In 1928 they were able to extract 1 gram of the element by processing 660 kg of molybdenite. In 2020 a memorial medal of the discovery was issued by ISTR (art-designer: Igor Petrov).
Rhenium has one stable isotope, rhenium-185, which nevertheless occurs in minority abundance, a situation found only in two other elements (indium and tellurium). Naturally occurring rhenium is only 37.4% 185 Re, and 62.6% 187 Re, which is unstable but has a very long half-life (~10 10 years).
Rhenium resembles manganese chemically and is obtained as a by-product of molybdenum and copper ore's extraction and refinement. Rhenium shows in its compounds a wide variety of oxidation states ranging from −1 to +7. Discovered in 1925, rhenium was the last stable element to be discovered. It was named after the river Rhine in Europe.
The Arkansas Museum of Natural Resources is a museum and Arkansas state park in Smackover, Arkansas, in the United States. The museum was formed in the 1980s to tell the history of the petroleum industry and later the brine industry as key economic movements spurred by natural resources in South Arkansas .
The Museum of Discovery, formerly the Arkansas Museum of Natural History and Antiquities, is located in downtown Little Rock, Arkansas. The museum is housed in a historic building in the River Market District on the Arkansas River. The museum has a focus on STEM education, and all of the exhibits are interactive.
An Arkansas man who picked up what he thought was a piece of glass at a state park says he later learned his jelly bean-sized find was something much more valuable: It was a 4.87-carat diamond.
It is the raw material for all rhenium compounds, being the volatile fraction obtained upon roasting the host ore. [26] Rhenium, in addition to the +4 and +7 oxidation states, also forms a trioxide. It can be formed by reducing rhenium(VII) oxide with carbon monoxide at 200 C or elemental rhenium at 4000 C. [27] It can also be reduced with ...
It turns out he found a 4.87-carat diamond in the shape of a pyramid — the largest diamond registered there since 2020, officials say. “Mr. Evans’ diamond is spectacular to see.