MacArthur Fellows Program

MacArthur Fellows / Meet the Class of 1988

Raymond Jeanloz


Age: 36

Published August 1, 1988

Raymond Jeanloz is a solid-earth geoscientist whose contributions have linked mineral physics, chemistry, and materials science.

Jeanloz’ high-temperature, high-pressure experiments have resulted in a better understanding of the interiors of the Earth and other planets.  He and his students found that the Earth’s core is as hot as the surface of the Sun, and demonstrated that magnesium-silicate perovskite (a material formed only at high pressures) is the main constituent making up our planet.  They have worked to create new materials that cannot be synthesized at ordinary pressures, such as ultra-hard, diamond-like substances, and very dense amorphous materials with unusual mechanical and electronic properties.

Jeanloz is a professor in the Department of Earth and Planetary Science and the Department of Astronomy at the University of California, Berkeley.  He also serves as an advisor to the U.S. government and the University of California in the areas of Earth science, resources and the environment, national and international security, and arms control. 

Jeanloz received a B.A. (1975) from Amherst College and a Ph.D. (1979) from the California Institute of Technology.

Last updated January 1, 2005.

Raymond Jeanloz In the Media

About the Fellows Program

The MacArthur Fellows Program awards unrestricted fellowships to talented individuals who have shown extraordinary originality and dedication in their creative pursuits and a marked capacity for self-direction. Learn More

Steve Coleman, Jazz Composer and Saxophonist

Class of 2014

Review Affirms Impact and Inspiration of MacArthur Fellows Program thumbnail

Review Affirms Impact and Inspiration of MacArthur Fellows Program

“We are proud of the Fellows Program and its impact on the lives of not just those selected but people all over the world." Cecilia Conrad, Vice President, MacArthur Fellows program. Read More
"Five Myths About the MacArthur ‘Genius Grants’" thumbnail

"Five Myths About the MacArthur ‘Genius Grants’"

Commentary by Cecilia Conrad originally published in the Washington Post Read More