Post-spinel transformations and equation of state in ZnGa2O4: Determination at high pressure by in situ x-ray diffraction

被引：88

作者：

Errandonea, D. ^{[1
]}

Kumar, Ravhi S. ^{[2
]}

Manjon, F. J. ^{[3
]}

Ursaki, V. V. ^{[4
]}

Rusu, E. V. ^{[4
]}

机构：

[1] Univ Valencia, Fdn Gen, MALTA Consolider Team, ICMUV,Dept Fis Aplicada, E-46100 Valencia, Spain

[2] Univ Nevada, High Pressure Sci & Engn Ctr, Dept Phys & Astron, Las Vegas, NV 89154 USA

[3] Univ Politecn Valencia, MALTA Consolider Team, Dept Fis Aplicada, IDF, Valencia 46022, Spain

[4] Moldavian Acad Sci, Inst Appl Phys, Kishinev 2028, Moldova

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 02期

关键词：

equations of state; high-pressure solid-state phase transformations; X-ray diffraction; zinc compounds; PHASE-TRANSITION; POWDER DIFFRACTION; ORDER-DISORDER; ZINC ALUMINATE; TEMPERATURE; CRYSTALS; OXIDES; COMPRESSIBILITY; GALLATE;

D O I：

10.1103/PhysRevB.79.024103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Room-temperature angle-dispersive x-ray diffraction measurements on spinel ZnGa2O4 up to 56 GPa show evidence of two structural phase transformations. At 31.2 GPa, ZnGa2O4 undergoes a transition from the cubic spinel structure to a tetragonal spinel structure similar to that of ZnMn2O4. At 55 GPa, a second transition to the orthorhombic marokite structure (CaMn2O4-type) takes place. The equation of state of cubic spinel ZnGa2O4 is determined: V-0=580.1(9) A(3), B-0=233(8) GPa, B-0(')=8.3(4), and B-0(')=-0.1145 GPa(-1) (implied value); showing that ZnGa2O4 is one of the less compressible spinels studied to date. For the tetragonal structure an equation of state is also determined: V-0=287.8(9) A(3), B-0=257(11) GPa, B-0(')=7.5(6), and B-0(')=-0.0764 GPa(-1) (implied value). The reported structural sequence coincides with that found in NiMn2O4 and MgMn2O4.

引用

页数：6

共 38 条

[1] 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

[2] 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

[3] FINITE STRAIN ISOTHERM AND VELOCITIES FOR SINGLE-CRYSTAL AND POLYCRYSTALLINE NACL AT HIGH-PRESSURES AND 300-DEGREE-K [J].

BIRCH, F .

JOURNAL OF GEOPHYSICAL RESEARCH, 1978, 83 (NB3) :1257-1268

[4] Pseudo-potential calculations of structural and elastic properties of spinel oxides ZnX2O4 (X = Al, Ga, In) under pressure effect [J].

Bouhemadou, A. ;

Khenata, R. .

PHYSICS LETTERS A, 2006, 360 (02) :339-343

[5] Natural occurrence and synthesis of two new postspinel polymorphs of chromite [J].

Chen, M ;

Shu, JF ;

Mao, HK ;

Xie, XD ;

Hemley, RJ .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2003, 100 (25) :14651-14654

[6] Pressure-induced α→ω transition in titanium metal:: a systematic study of the effects of uniaxial stress [J].

Errandonea, D ;

Meng, Y ;

Somayazulu, M ;

Häusermann, D .

PHYSICA B-CONDENSED MATTER, 2005, 355 (1-4) :116-125

[7] High-pressure x-ray diffraction study on the structure and phase transitions of the defect-stannite ZnGa2Se4 and defect-chalcopyrite CdGa2S4 [J].

Errandonea, D. ;

Kumar, Ravhi S. ;

Manjon, F. J. ;

Ursaki, V. V. ;

Tiginyanu, I. M. .

JOURNAL OF APPLIED PHYSICS, 2008, 104 (06)

[8] High-pressure electronic structure and phase transitions in monoclinic InSe:: X-ray diffraction, Raman spectroscopy, and density functional theory [J].

Errandonea, D. ;

Martinez-Garcia, D. ;

Segura, A. ;

Haines, J. ;

Machado-Charry, E. ;

Canadell, E. ;

Chervin, J. C. ;

Chevy, A. .

PHYSICAL REVIEW B, 2008, 77 (04)

[9] Structural studies of gadolinium at high pressure and temperature [J].

Errandonea, D. ;

Boehler, R. ;

Schwager, B. ;

Mezouar, M. .

PHYSICAL REVIEW B, 2007, 75 (01)

[10] Structural stability of Fe5Si3 and Ni2Si studied by high-pressure x-ray diffraction and ab initio total-energy calculations [J].

Errandonea, D. ;

Santamaria-Perez, D. ;

Vegas, A. ;

Nuss, J. ;

Jansen, M. ;

Rodriguez-Hernandez, P. ;

Munoz, A. .

PHYSICAL REVIEW B, 2008, 77 (09)

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