Pressure-induced phase transition in Mg0.8Fe0.2O ferropericlase

被引：24

作者：

Kantor, I

Dubrovinsky, L

McCammon, C

Kantor, A

Pascarelli, S

Aquilanti, G

Crichton, W

Mattesini, M

Ahuja, R

Almeida, J

Urusov, V

机构：

[1] Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany

[2] European Synchrotron Radiat Facil, F-38043 Grenoble 9, France

[3] Uppsala Univ, Condensed Matter Theory Grp, S-75105 Uppsala, Sweden

[4] Univ Autonoma Madrid, Dept Fis Mat Condensada, Madrid, Spain

[5] Moscow MV Lomonosov State Univ, Dept Crystallog, Moscow 119992, Russia

来源：

PHYSICS AND CHEMISTRY OF MINERALS | 2006年 / 33卷 / 01期

关键词：

diamond anvil cell; ferropericlase; high pressure;

D O I：

10.1007/s00269-005-0052-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Combined X-ray powder diffraction, Mossbauer, and XANES spectroscopy in situ experiments revealed the transformation of cubic (Mg0.8Fe0.2)O ferropericlase to a rhombohedrally distorted phase at 35( 1) GPa and room temperature. The Mossbauer spectroscopy results show that the rhombohedral distortion does not involve magnetic ordering. Combined with data from the literature, our results imply that the cubic to rhombodedral transition occurs in (Mg, Fe) O under conditions of non- hydrostatic stress over a wide range of composition (0.2 <= x(Fe) <= 1).

引用

页码：35 / 44

页数：10

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[1] Real-space multiple-scattering calculation and interpretation of x-ray-absorption near-edge structure [J].