α-PbO2-type high-pressure polymorph of GeO2 -: art. no. 132101

被引：41
作者：
Prakapenka, VB [1 ]
Dubrovinsky, LS
Shen, G
Rivers, ML
Sutton, SR
Dmitriev, V
Weber, HP
Le Bihan, T
机构：
[1] Univ Chicago, Chicago, IL 60637 USA
[2] Univ Bayreuth, D-95440 Bayreuth, Germany
[3] European Synchrotron Radiat Facil, SNBL, F-38043 Grenoble, France
来源：
PHYSICAL REVIEW B | 2003年 / 67卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.67.132101
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have studied the high pressure polymorphism of GeO2 at pressures up to 60 GPa and temperatures to similar to1800 K in a laser-heated diamond anvil cell. We have synthesized an alpha-PbO2-type (space group Pbcn) phase of GeO2 and demonstrated that it is the stable post-CaCl2-type (space group Pnnm) polymorph at pressures above 44 GPa. The alpha-PbO2-structured GeO2, with a bulk modulus of 256(5) GPa, is denser than CaCl2 type by 1.6% at 60 GPa. Our study shows that group-IV element dioxides (SiO2, GeO2, SnO2, and PbO2) have a common sequence of high-pressure structural transformations: rutile-type-->CaCl2-type-->alpha-PbO2-type.
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相关论文
共 38 条
[1]  
Anderson O., 1995, EQUATIONS STATE SOLI
[2]   Structural studies of rutile-type metal dioxides [J].
Bolzan, AA ;
Fong, C ;
Kennedy, BJ ;
Howard, CJ .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 1997, 53 :373-380
[3]   Martensitic transition in single-crystalline α-GeO2 at compression [J].
Brazhkin, VV ;
Tat'yanin, EV ;
Lyapin, AG ;
Popova, SV ;
Tsiok, OB ;
Balitskii, DV .
JETP LETTERS, 2000, 71 (07) :293-297
[4]   MULTISTAGE DIFFUSIONLESS PATHWAYS FOR RECONSTRUCTIVE PHASE-TRANSITIONS - APPLICATION TO BINARY COMPOUNDS AND CALCIUM-CARBONATE [J].
CHRISTY, AG .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1993, 49 :987-996
[5]  
Dera P, 2002, AM MINERAL, V87, P1018
[6]   Experimental and theoretical identification of a new high-pressure phase of silica [J].
Dubrovinsky, LS ;
Saxena, SK ;
Lazor, P ;
Ahuja, R ;
Eriksson, O ;
Wills, JM ;
Johansson, B .
NATURE, 1997, 388 (6640) :362-365
[7]   Pressure-induced transformations of cristobalite [J].
Dubrovinsky, LS ;
Dubrovinskaia, NA ;
Saxena, SK ;
Tutti, F ;
Rekhi, S ;
Le Bihan, T ;
Shen, GY ;
Hu, J .
CHEMICAL PHYSICS LETTERS, 2001, 333 (3-4) :264-270
[8]   Study of laser heated iron using third generation synchrotron X-ray radiation facility with imaging plate at high pressures [J].
Dubrovinsky, LS ;
Lazor, P ;
Saxena, SK ;
Häggkvist, P ;
Weber, HP ;
Le Bihan, T ;
Hausermann, D .
PHYSICS AND CHEMISTRY OF MINERALS, 1999, 26 (07) :539-545
[9]  
DUBROVINSKY LS, IN PRESS HIGH PRESSU
[10]   Structural evolution of rutile-type and CaCl2-type germanium dioxide at high pressure [J].
Haines, J ;
Léger, JM ;
Chateau, C ;
Pereira, AS .
PHYSICS AND CHEMISTRY OF MINERALS, 2000, 27 (08) :575-582
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