STRUCTURE OF COVALENTLY BONDED GLASS-FORMING MELTS - A FULL PARTIAL-STRUCTURE-FACTOR ANALYSIS OF LIQUID GESE2

被引：142

作者：

PENFOLD, IT

SALMON, PS

机构：

[1] School of Physics, University of East Anglia

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.67.97

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The first full partial-structure-factor analysis of molten GeSe2 is made using the method of isotopic substitution in neutron diffraction. It is shown that the melt comprises roughly equal numbers of edge- and corner-sharing tetrahedra which give rise to a highly connected or network liquid. Concentration fluctuations extend over distances characteristic of the intermediate-range order, contrary to the results obtained from recently developed effective potentials for covalently bonded glass-forming melts. The problem as to whether or not GeSe2 forms a chemically ordered continuous random network is examined.

引用

页码：97 / 100

页数：4

共 24 条

[1] Structural aspects of the electrical resistivity of binary alloys [J].

Bhatia, A. B. ;

Thornton, D. E. .

PHYSICAL REVIEW B-SOLID STATE, 1970, 2 (08) :3004-3012

[2] MICROSCOPIC ORIGIN OF THE COMPANION A1 RAMAN LINE IN GLASSY GE(S,SE)2 [J].

BRIDENBAUGH, PM ;

ESPINOSA, GP ;

GRIFFITHS, JE ;

PHILLIPS, JC ;

REMEIKA, JP .

PHYSICAL REVIEW B, 1979, 20 (10) :4140-4144

[3] CRYSTAL-STRUCTURE OF GERMANIUM DISELENIDE [J].

DITTMAR, G ;

SCHAFER, H .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1976, 32 (SEP15) :2726-2728

[4] STRUCTURE OF MOLTEN SODIUM-CHLORIDE [J].

EDWARDS, FG ;

ENDERBY, JE ;

HOWE, RA ;

PAGE, DI .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1975, 8 (21) :3483-3490

[5] COMMENT ON REVERSE MONTE CARLO SIMULATION [J].

Evans, R. .

MOLECULAR SIMULATION, 1990, 4 (06) :409-411

[6] X-RAY-SCATTERING STUDIES OF INTERMEDIATE-RANGE ORDER IN AMORPHOUS GESE2 [J].

FISCHERCOLBRIE, A ;

FUOSS, PH .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1990, 126 (1-2) :1-34

[7] ASSIGNMENT OF THE COMPANION-A1C LINE IN GEX(S,SE)1-X GLASSES [J].

GRIFFITHS, JE ;

PHILLIPS, JC ;

ESPINOSA, GP ;

REMEIKA, JP ;

BRIDENBAUGH, PM .

PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1984, 122 (01) :K11-K15

[8] INTEGRAL-EQUATION APPROACH TO MEDIUM-RANGE ORDER IN MOLTEN AND GLASSY CHALCOGENIDES [J].

IYETOMI, H ;

VASHISHTA, P ;

KALIA, RK .

PHYSICAL REVIEW B, 1991, 43 (02) :1726-1734

[9] RAMAN-SCATTERING AND STRUCTURAL ORDER IN LIQUID GESE2 [J].

MAGANA, JR ;

LANNIN, JS .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1983, 59-6 (DEC) :1055-1058

[10] CONFIGURATIONS OF A CHEMICALLY ORDERED CONTINUOUS RANDOM NETWORK TO DESCRIBE THE STRUCTURE OF GESE2 GLASS [J].

NEMANICH, RJ ;

GALEENER, FL ;

MIKKELSEN, JC ;

CONNELL, GAN ;

ETHERINGTON, G ;

WRIGHT, AC ;

SINCLAIR, RN .

PHYSICA B & C, 1983, 117 (MAR) :959-961

← 1 2 3 →