Search results for tantalite

Earth Sciences Aug 23, 2023

Study finds 21st century mining boom across the tropics is degrading rivers

Gold and mineral mining in and near rivers across the tropics is degrading waterways in 49 countries, according to a Dartmouth-led study. Published in Nature, the findings represent the first physical footprint of river mining ...

General Physics Oct 2, 2020

Two groups demonstrate designs for electrocaloric cooling that change temperature under an electric field

Two teams working independently of each other have demonstrated designs for electrocaloric cooling that can change temperatures under an electric field. Both groups used lead scandium tantalate capacitors in their systems, ...

Optics & Photonics Oct 26, 2018

Light-bending tech shrinks kilometers-long radiation system to millimeter scale

The DESY accelerator facility in Hamburg, Germany, goes on for miles to host a particle making kilometer-long laps at almost the speed of light. Now researchers have shrunk such a facility to the size of a computer chip.

Environment Dec 18, 2015

'Beaches' from illegal mining scar Colombia's Amazon

It's called a "beach", or "playa" in Spanish, but the swath of sand and polluted water in a remote part of the Amazon jungle in Colombia is not a place of leisure by any means.

Earth Sciences Apr 30, 2014

How life could have produced most minerals on Earth

While astronomers are trying to figure out which planets they find are habitable, there are a range of things to consider. How close are they to their parent star? What are their atmospheres made of? And once those answers ...

Earth Sciences May 2, 2012

Beyond 'blood diamonds:' Fingerprinting other conflict minerals

Blood diamonds may get the most attention. But they are not the only minerals sold on the world market to finance wars and other conflicts in sub-Saharan Africa, according to an article in the current issue of Chemical & ...

Earth Sciences Dec 8, 2010

Tracking conflict minerals in Congo

Eastern Congo's hillsides are rich in an element that most people have never heard of, a metal that is inside most of the mobile phones, laptops, and other electronics that we use every day.