JSHPREVIEW : Vol. 21 (2011) , No. 2 69

第一原理計算から予測される地球内核における鉄および鉄-軽元素合金の結晶構造と弾性特性

石河孝洋¹⁾, 土屋卓久²⁾

1) 大阪大学　極限量子科学研究センター
2) 愛媛大学　地球深部ダイナミクス研究センター

(受付 2010/12/27)
(受理 2011/04/08)

Solving enigmas of the Earth's inner core is a grand challenge in mineral physics, and first-principles studies play a significant role for our understanding. Iron is expected to be a major component of the inner core, and first-principles calculations have shed new light on the stable crystal structure and elasticity of iron at the inner core conditions. In this article, reviewing recent first-principles studies, we discuss the stable crystal structure and the elasticity of pure iron at the inner conditions, the effect of light element on them, and an outlook for the future direction.

first-principles calculation, Earth's inner core, crystal structure, elasticity, iron, iron-light element alloy