Latest news with #UniversityofGottingen
NDTV
6 days ago
- Science
- NDTV
The Earth Is Leaking Gold: Scientists Stunned To Find Precious Metals Emerging From Core
A groundbreaking study of Hawaiian volcanic rocks shows that Earth's core is leaking gold and other precious metals to the surface. It's estimated that over 99.99% of the Earth's gold and precious metals, such as Ruthenium, are trapped in the metallic core, buried beneath 3,000km of solid rock, Science Alert reported. These valuable resources have been locked away since the planet's formation 4.5 billion years ago. The research has been published in Nature. Recently, a team from the University of Gottingen conducted a study on Hawaiian volcanic rocks, employing advanced isotopic analysis techniques to detect trace elements. They found unusually high levels of a specific ruthenium isotope, which is more prevalent in the Earth's core than its mantle. This suggests that the lava material originated from deep within the planet. "When the first results came in, we realised that we had literally struck gold! Our data confirmed that material from the core, including gold and other precious metals, is leaking into the Earth's mantle above," says geochemist Nils Messling of Gottingen University in Germany. The study shows that Earth's core is less isolated than previously thought, with core material reaching the surface during volcanic eruptions, offering future research opportunities. Ruthenium isotopes could serve as a novel tracer for studying core-mantle interactions, according to the researchers. The analysis indicates that hundreds of quadrillion metric tonnes of superheated material from near the core-mantle boundary rise to form ocean islands like Hawaii. Professor Matthias Willbold, co-author of the study, emphasised the significance of the findings: "Our findings not only show that Earth's core is not as isolated as previously assumed. We can now also prove that huge volumes of super-heated mantle material, several hundred quadrillion metric tons of rock, originate at the core-mantle boundary and rise to Earth's surface to form ocean islands like Hawaii." The study's findings ALSO suggest that some of the world's gold and precious metal supplies may have originated from the Earth's core. However, researchers are still unsure if the core-leaking process observed in the study has been a consistent phenomenon throughout the planet's history. "Our findings open up an entirely new perspective on the evolution of the inner dynamics of our home planet," the study noted.
The Hindu
09-05-2025
- Science
- The Hindu
Three men in a lab (to say nothing of an element)
Bunsen, the burner German chemist Robert Bunsen was born on March 30, 1811 in Gottingen. His father taught modern languages at the University of Gottingen and Bunsen too went on to earn his doctorate there. Before he returned to this place as a lecturer, he travelled across Europe for three years. He also taught at the Universities of Marburg and Breslau, but it was as a professor at Heidelberg, where he taught from 1852 until his death in 1899, that he is best associated with. Bunsen never married, instead choosing to live for his students and his laboratory, setting up an excellent lab and remaining popular with his pupils throughout. Bunsen was first drawn towards organic chemistry and he was able to produce what remains one of the most effective antidotes for arsenic poisoning – iron oxide hydrate. Bunsen, however, lost one of his eyes when working with cacodyl cyanide, an arsenic compound, forcing him to move to other disciplines. In case you feel familiar with the name Bunsen, that's because you might have encountered the Bunsen burner in your chemistry labs. Along with his laboratory assistant Peter Desaga, he built the device that now bears his name in 1855. Part of chemistry labs across the world, Bunsen burners enabled its inventor to study emission spectra from heated elements. He put it to great effect and showcased the power of spectroscopy as a tool for scientific research. Kirchhoff's key contributions Born on March 12, 1824 – nearly 13 years after Bunsen – in Konigsberg, Prussia (now Kaliningrad, Russia), Gustav Robert Kirchhoff is a German chemist, mathematician, and physicist. He married the daughter of his mathematics professor and the couple moved to Berlin soon after their wedding. It was at the University of Breslau, where he'd become a professor at the young age of 26, that Kirchhoff first encountered Bunsen. The duo would go on to do great things together, but Kirchhoff has plenty of claims to fame on his own. Both Kirchhoff's laws of electrical circuits and Kirchhoff's laws of thermodynamics are, unsurprisingly, named after him in his honour. He made fundamental contributions in helping understand the emission of black-body radiation by heated objects, electrical circuits, and spectroscopy. The term 'black body,' in fact, was coined by Kirchhoff in 1860, the same year he discovered caesium with Bunsen. He also used emission spectra to study the sky and identified 30 elements in the sun. Bunsen-Kirchhoff partnership In 1854, Bunsen convinced Kirchhoff to move to Heidelberg in order to facilitate their collaboration further. They were working on research to try and prove that all pure elements have a distinct spectrum that they emit. While work in this field was already on for nearly a century, if not more, such studies lacked the systemic approach and careful examination that this duo wanted to bring to the table. Partnering for this work in 1859, Bunsen suggested using filters to block colours like the yellow of sodium compounds. He believed that such an arrangement would facilitate the detection of less intense colours that are also emitted by other elements. Kirchhoff, meanwhile, wanted to adapt a method that a couple of others – English mathematician and astronomer John Frederick William Herschel, and English scientist, inventor, and photography pioneer William Henry Fox Talbot – had employed a few decades earlier. He wanted to improve Bunsen's technique by adapting the Herschel/Talbot method wherein light was passed through a prism. Bunsen and Kirchhoff effectively came up with their version of the spectroscope. In 1860, the duo analysed the spectral lines of spring water from Durkheim. Known to be rich in lithium compounds, Bunsen noticed something different in the spectra. Apart from the expected spectral lines from sodium, lithium, and potassium, Bunsen also identified a new sky-blue doublet that he hadn't seen before. He named the new element caesium, naming it after the Latin word for 'sky blue.' The duo made their discovery public by announcing it on May 10, 1860. Having managed to get just 2 mg of caesium chloride from 10 litres of spa water, Bunsen commissioned a nearby chemical factory to evaporate 12,000 gallons of spring water in order to isolate caesium and study its properties. Even though he failed to obtain pure caesium, he was able to establish the relative atomic mass of the element as 128.4 (we know that 132.9 is the value now). Bunsen and Krichhoff went on to observe the presence of another alkali metal in spa water by observing dark red in the spectral lines. They named this element rubidium, again from the Latin for 'dark red.' While the duo were successful in isolating rubidium, they couldn't replicate the success in the case of caesium. Setterberg isolates caesium The credit for first isolating caesium goes to Swedish chemist Carl Theodor Setterberg. Born in 1853 in Skaraborg, Sweden, Setterberg set about living a lifetime as an industrial chemist. When doing research for his PhD, August Kekule – his supervisor and professor of chemistry at the University of Bonn – tasked him with isolating caesium. Following the extraction of lithium from lepidolite, an ore of the mica group, there's a lot of waste material that remains. Setterberg decided to use this as his starting point for isolating caesium. The waste ore was converted into a mixture of potash alum, along with those of rubidium and caesium. With the help of fractional crystallisation, Setterberg was sure he could separate the alum salts. This is exactly what happened as Setterberg started off with around 350 kg of the waste ore, before finishing with 10 kg of a caesium compound. This was more than Bunsen ever had, allowing Setterberg to try different techniques to isolate caesium. After a failed experiment when he tried the carbon reduction method that Bunsen had successfully used to obtain rubidium, Setterberg switched to electrolysis. Setterberg found that cyanide-based mixtures of caesium salts were ideal for his purpose as he successfully isolated the element in 1882. He went on to describe some of its properties in the same year, giving its melting point and density. Setterberg's contribution, however, is often missed out when talking about the discovery of caesium. The world of science can feel strange to many onlookers to the extent of seeming incongruous on occasions. The discovery of caesium is a case in point. Wherein Setterberg's isolation is often relegated to a footnote in the discovery story, the opposite rings true in the case of fluorine. Even though Swedish chemist Carl Wilhelm Scheele made significant contributions to the understanding of fluorine in the 18th Century, it is French chemist Henri Moissan, who first isolated the element over 100 years later in 1886, who is always immediately associated with it. Caesium facts A chemical element with symbol Cs and atomic number 55. It is highly reactive and is a soft, silvery-gold alkali metal. A liquid just above room temperature, caesium has a melting point of 28.4 °C. The current definition of a second is based on caesium. The most famous use of caesium is in the atomic clock.
