Pressure-induced phase transition study of magnesiochromite (MgCr2O4) by Raman spectroscopy and X-ray diffraction

被引：50

作者：

Yong, Wenjun ^{[1
]}

Botis, Sanda ^{[1
]}

Shieh, Sean R. ^{[1
,2
]}

Shi, Weiguang ^{[1
]}

Withers, Anthony C. ^{[3
]}

机构：

[1] Univ Western Ontario, Dept Earth Sci, London, ON N6A 5B7, Canada

[2] Univ Western Ontario, Dept Phys & Astron, London, ON N6A 5B7, Canada

[3] Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA

来源：

PHYSICS OF THE EARTH AND PLANETARY INTERIORS | 2012年 / 196卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Phase transition; Magnesiochromite; Spinel; Raman; X-ray diffraction; High pressure; EQUATION-OF-STATE; DETRITAL CHROMIAN SPINEL; CRYSTAL-CHEMISTRY; HEAT-CAPACITY; LUOBUSA OPHIOLITE; THERMAL-EXPANSION; SINGLE-CRYSTAL; SYSTEM; STABILITY; FECR2O4;

D O I：

10.1016/j.pepi.2012.02.011

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Pressure-induced phase transition in magnesiochromite (MgCr2O4) was studied by in situ Raman spectroscopy and X-ray diffraction to 50 and 60 GPa, respectively. A polymorphic phase transition from cubic Fd (3) over barm structure to tetragonal I4(1)/amd structure was observed at pressures above 20 GPa and this transition is complete at 23.5 GPa. The volume data for magnesiochromite fitted to Birch-Murnaghan equation of state (EOS) yield K-0 = 189(2) GPa, K-0', = 7.2(3) and V-0 = 578.68(4) angstrom(3), consistent with theoretical calculations. The EOS of the high pressure tetragonal phase was also obtained as K0 = 191(8) GPa and V-0 = 279(1) angstrom(3) when K-0', = 4 (fixed). The volume reduction at phase transition is about 4.4%. The high pressure phase is unquenchable and transformed back to magnesiochromite with little hysteresis upon release of pressure. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：75 / 82

页数：8

共 87 条

[1] High pressure transitions in the system MgAl2O4-CaAl2O4:: a new hexagonal aluminous phase with implication for the lower mantle [J].

Akaogi, M ;

Hamada, Y ;

Suzuki, T ;

Kobayashi, M ;

Okada, M .

PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 1999, 115 (01) :67-77

[2] High-pressure phase transformations in the MgFe2O4 and Fe2O3-MgSiO3 systems [J].

Andrault, D ;

Bolfan-Casanova, N .

PHYSICS AND CHEMISTRY OF MINERALS, 2001, 28 (03) :211-217

[3] Effective hydrostatic limits of pressure media for high-pressure crystallographic studies [J].

Angel, Ross J. ;

Bujak, Maciej ;

Zhao, Jing ;

Gatta, G. Diego ;

Jacobsen, Steven D. .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2007, 40 :26-32

[4]

[Anonymous], REFRACT IND CERAM

[5]

[Anonymous], REFRACT IND CERAM

[6]

[Anonymous], 1967, THEORY CAN J EARTH 1, DOI DOI 10.1139/E65-046

[7] Spinel to CaFe2O4 Transformation: Mechanism and Properties of β-CdCr2O4 [J].

Arevalo-Lopez, Angel M. ;

Dos santos-Garcia, Antonio J. ;

Castillo-Martinez, Elizabeth ;

Duran, Alejandro ;

Alario-Franco, Miguel A. .

INORGANIC CHEMISTRY, 2010, 49 (06) :2827-2833

[8] High-pressure phase transition and properties of spinel ZnMn2O4 [J].

Åsbrink, S ;

Waskowska, A ;

Gerward, L ;

Olsen, JS ;

Talik, E .

PHYSICAL REVIEW B, 1999, 60 (18) :12651-12656

[9] High-pressure phase of the cubic spinel NiMn2O4 [J].

Asbrink, S ;

Waskowska, A ;

Olsen, JS ;

Gerward, L .

PHYSICAL REVIEW B, 1998, 57 (09) :4972-4974

[10] THE EFFECT OF PRESSURE-INDUCED SOLID-SOLID PHASE-TRANSITIONS ON DECOMPRESSION MELTING OF THE MANTLE [J].

ASIMOW, PD ;

HIRSCHMANN, MM ;

GHIORSO, MS ;

OHARA, MJ ;

STOLPER, EM .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1995, 59 (21) :4489-4506

← 1 2 3 4 5 6 7 8 9 →