May 4, 2016
DTM Weekly Seminar Series
Alex Halliday, a professor of geochemistry at Oxford University, will give a talk titled "Terrestrial core formation and the origin of the Moon" at 11 a.m. on Wednesday, 4 May 2016, in the Greenewalt Lecture Hall as part of DTM's Weekly Seminar Series.
Halliday received his Ph.D. in physics from the University of Newcastle in 1977. He uses isotope geochemistry to understand the origins of planets and the present day natural behaviour of the Earth by utilising mass spectrometry to measure small natural variations in atomic abundance.
Coffee, tea, and a continental breakfast will be served before the lecture at 10:30 a.m.
April 28, 2016
Neighborhood Lecture Series
Alexander Goncharov, senior staff scientist at the Geophysical Laboratory, will give a talk titled "High-Pressure Alchemy" at 6:30 p.m. on Thursday, April 28, 2016 as part of Carnegie's Neighborhood Lecture Series.
A major focus of the field of chemistry is predicting how various atoms form bonds, hence molecules, and how such bonding controls the structure and properties of molecular matter. Historically, almost all chemistry has been performed at ambient pressure - the atmospheric pressure at the Earth’s surface. However, the majority of matter in the universe resides at extreme pressures and temperatures that force atoms into extremely close contact, where chemical behavior can become surprising, and where very exotic compounds can become stable.
During this lecture, Goncharov will explain how we do experiments at extreme pressures, in some cases exceeding one million atmospheres. He will present some recent discoveries of unusual “salts,” and stable compounds with noble gases. These exotic materials hold a promise of potentially unparalleled physical and chemical properties. Many of these newly discovered extreme materials are made of the most abundant elements in the universe and thus are likely to be present in the interiors of giant planets such as Jupiter and Saturn.
Lectures are free, but registration is encouraged. Click here to RSVP.