Featured Research

from universities, journals, and other organizations

New finding on key element of Earth's lower mantle

Date:
January 25, 2010
Source:
American Geophysical Union
Summary:
The electronic spin state of iron in perovskite, a major component of Earth's lower mantle, can influence the physical and chemical properties of the mantle. However, previous studies have presented an unclear picture of the spin state of iron in perovskite, with some experiments contradicting computational results. In a new experiment designed to better control the conditions under which perovskite is synthesized, researchers measured the spin state of iron in perovskite.

The electronic spin state of iron in perovskite, a major component of Earth's lower mantle, can influence the physical and chemical properties of the mantle. However, previous studies have presented an unclear picture of the spin state of iron in perovskite, with some experiments contradicting computational results.

Related Articles


In a new experiment designed to better control the conditions under which perovskite is synthesized, Grocholski et al. measured the spin state of iron in perovskite. They found the dominant spin state at pressures below 50 gigapascals (7.25 million pounds per square inch) to be high spin but observed a transition to a possible mixed spin state at higher pressures.

These results indicate that perovskite is in a mixed or high spin state at least to 2,000 kilometers (1,242 miles) depth in the mantle, consistent with computational results.

The research appears in the journal Geophysical Research Letters.

Authors include B. Grocholski and S. H. Shim, Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology; W. Sturhahn and J. Zhao, Sector 3, Advanced Photon Source, Argonne National Laboratory; Y. Xiao and P. C. Chow, HPCAT, Advanced Photon Source, Argonne National Laboratory.


Story Source:

The above story is based on materials provided by American Geophysical Union. Note: Materials may be edited for content and length.


Journal Reference:

  1. Grocholski et al. Spin and valence states of iron in (Mg0.8Fe0.2)SiO3 perovskite. Geophysical Research Letters, 2009; 36 (24): L24303 DOI: 10.1029/2009GL041262

Cite This Page:

American Geophysical Union. "New finding on key element of Earth's lower mantle." ScienceDaily. ScienceDaily, 25 January 2010. <www.sciencedaily.com/releases/2010/01/100121164355.htm>.
American Geophysical Union. (2010, January 25). New finding on key element of Earth's lower mantle. ScienceDaily. Retrieved January 28, 2015 from www.sciencedaily.com/releases/2010/01/100121164355.htm
American Geophysical Union. "New finding on key element of Earth's lower mantle." ScienceDaily. www.sciencedaily.com/releases/2010/01/100121164355.htm (accessed January 28, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Wednesday, January 28, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Aquaponics Turn Suburban Industrial Park Into Farmland: Hume

Aquaponics Turn Suburban Industrial Park Into Farmland: Hume

The Toronto Star (Jan. 27, 2015) — Ancient techniques of growing greens with fish and water are well ahead of Toronto bylaws. Video provided by The Toronto Star
Powered by NewsLook.com
Madagascar Locust Plague Could Mean Famine For Millions

Madagascar Locust Plague Could Mean Famine For Millions

Newsy (Jan. 27, 2015) — The Food and Agriculture Organization says millions could face famine in Madagascar without more funding to finish locust eradication efforts. Video provided by Newsy
Powered by NewsLook.com
Storm Slams New England, Spares Mid-Atlantic

Storm Slams New England, Spares Mid-Atlantic

AP (Jan. 27, 2015) — A howling blizzard with wind gusts over 70 mph heaped snow on Boston along with other stretches of lower New England and Long Island on Tuesday, but failed to live up to the hype in Philadelphia and New York City. (Jan. 27) Video provided by AP
Powered by NewsLook.com
Mexico's Volcano of Fire Erupts Again

Mexico's Volcano of Fire Erupts Again

Reuters - News Video Online (Jan. 26, 2015) — A huge plume of smoke shoots into the air as activity in Mexico&apos;s Volcano of Fire picks up again. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins