IIT Kharagpur researchers investigate the light side of Earth's inner core
GeoSpace (August 23, 2017)
Scientists can generally agree that Earth's inner core, located more than 5,000 kilometers (3,000 miles) beneath the surface, is a dense ball of iron with a small amount of nickel. It likely contains lighter elements as well, such as silicon, oxygen, sulfur, carbon, or hydrogen, but researchers have yet to come to a consensus on the identities and quantities of these lighter elements.
Researchers report in a new study that a carbon compound called iron carbide, combined with small amounts of silicon impurities, may be an important component of the inner core. (Read More)