dhcp as a possible new epsilon' phase of iron at high pressures and temperatures

被引：37

作者：

Yoo, CS ^{[1
]}

Soderlind, P ^{[1
]}

Moriarty, JA ^{[1
]}

Cambell, AJ ^{[1
]}

机构：

[1] CARNEGIE INST WASHINGTON,GEOPHYS LAB,WASHINGTON,DC 20015

来源：

PHYSICS LETTERS A | 1996年 / 214卷 / 1-2期

关键词：

D O I：

10.1016/0375-9601(96)00160-0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using in-situ X-ray diffraction and ab initio theoretical calculations, we have identified a possible new phase of iron, epsilon'-Fe, in the stability field of what was previously known for epsilon(hcp)- and gamma(fcc)-Fe, The crystal structure of epsilon'-Fe is indexed to a dhcp structure with an ABAC stacking sequence. The epsilon'-phase exists at temperatures lower than the gamma-phase and at pressures between 15 and 40 GPa, which differs from the stability field previously suggested for beta-Fe above 40 GPa.

引用

页码：65 / 70

页数：6

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