group of scientists Discover a never-before-seen mineral inside a diamond taken from the depths of the earth. premeditated”DavimawetaIn honor of an outstanding geophysicist named Ho Kwang (Dave) Mao.
According to the post Live Science, the metal is the first example of a type of Pedra PerovskitaIt consists of high pressure calcium silicate.
For a long time, davemaoite was expected to be an abundant and geochemically important mineral in the Earth’s mantle. But scientists have not found any direct evidence of its existence. why? because It decomposes into other metals when it moves to the surface and the pressure drops.
however, analysis Diamonds Botswanaformed in the mantle around 660 km below the surface From our planet, a sample of an intact davemaoite is trapped inside. as a result of, The International Mineralogical Association has confirmed that davemaoite is a new mineral.
“The discovery of the davemaoite was a surprise,” the study’s lead author told Live Science. Oliver Chuner, a mineralogist at the University of Nevada, Las Vegas. Tschauner and colleagues discovered the davemaoite sample with a technique known as synchrotron X-ray diffraction, which focuses a beam of high-energy radiation at specific points within the diamond with microscopic resolution. “By measuring the angle and intensity of the returning light, researchers can tell what’s insideTschauner explained. “The davemaoite sample within the diamond was only a few micrometers (millionths of a meter) in size, so less robust sampling techniques would have been missed,” he added.
Davemaoite is believed to play an important geochemical role in the Earth’s mantle. Scientists think that the metal, too May contain other trace elements, including uranium and thorium, which releases heat through radioactive decay. Therefore, davemaoite can help Generates a large amount of heat in the Earth’s mantleTschauner said.
In a study published in 2014 in the journal Science, scientists described another theoretical high-pressure mineral from the mantle, known as Bridgemanita. However, the bridgmanite sample did not originate from the mantle but from within a meteorite. “The discovery of davemaoite shows that more diamonds may form below the mantle than previously thought, and suggests that it may be the best place to look for more new mantle minerals,” Zeschner added.
“Chonner’s work inspires hope for discovering other challenging high-pressure phases in nature,” he said. survive in, a geophysicist at the Carnegie Institution for Science in Washington, in a related scientific article. “Such direct samples from the inaccessible lower mantle would fill in our knowledge gap about the chemical composition of our entire planet’s mantle.“.
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