THE PHASE-DIAGRAM AND THERMODYNAMICS OF SODIUM FULLERIDE FROM ELECTROCHEMICAL MEASUREMENTS

被引：8

作者：

KIM, JH ^{[1
]}

PETRIC, A ^{[1
]}

UMMAT, PK ^{[1
]}

DATARS, WR ^{[1
]}

机构：

[1] MCMASTER UNIV,DEPT PHYS & ASTRON,HAMILTON L8S 4M1,ONTARIO,CANADA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1994年 / 6卷 / 28期

关键词：

D O I：

10.1088/0953-8984/6/28/013

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Phase relations and thermodynamic properties of sodium fulleride (NaxC60) have been measured up to x = 6 by the electromotive force (EMF) method. Na beta-alumina was used as the solid electrolyte and Na was added to the cell containing a fixed amount of fullerene by coulometric titration. The phase diagram is characterized by alternate single-phase regions (EMF varying with composition) and two-phase regions (EMF plateaus). At 599 K, the Gibbs energies of formation of Na3C60 and Na6C60 are 113.2 and 94.7 kJ/mole of Na, respectively. A model is proposed for the Na activity (or EMF) as a function of composition based on nearest-neighbour interactions, orientational disorder and a random distribution of Na ions. The ionic size and the hindrance of rotation of C60 accounts for the miscibility gap in alkali fullerides in this model.

引用

页码：5387 / 5396

页数：10

共 18 条

[1]

Belosludov V. R., 1992, Modern Physics Letters B, V6, P1209, DOI 10.1142/S0217984992002106

[2] ELECTROCHEMICAL INTERCALATION OF LITHIUM INTO SOLID C60 [J].

CHABRE, Y ;

DJURADO, D ;

ARMAND, M ;

ROMANOW, WR ;

COUSTEL, N ;

MCCAULEY, JP ;

FISCHER, JE ;

SMITH, AB .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (02) :764-766

[3] SYNCHROTRON X-RAY STUDY OF ORIENTATIONAL ORDER IN SINGLE-CRYSTAL C-60 AT ROOM-TEMPERATURE [J].

CHOW, PC ;

JIANG, X ;

REITER, G ;

WOCHNER, P ;

MOSS, SC ;

AXE, JD ;

HANSON, JC ;

MCMULLAN, RK ;

MENG, RL ;

CHU, CW .

PHYSICAL REVIEW LETTERS, 1992, 69 (20) :2943-2946

[4] RELATION OF STRUCTURE AND SUPERCONDUCTING TRANSITION-TEMPERATURES IN A3C60 [J].

FLEMING, RM ;

RAMIREZ, AP ;

ROSSEINSKY, MJ ;

MURPHY, DW ;

HADDON, RC ;

ZAHURAK, SM ;

MAKHIJA, AV .

NATURE, 1991, 352 (6338) :787-788

[5] RAMAN-STUDY OF A STRUCTURAL PHASE-TRANSITION IN C-60 CRYSTALS [J].

HAMANAKA, Y ;

NAKASHIMA, S ;

HANGYO, M ;

SHINOHARA, H ;

SAITO, Y .

PHYSICAL REVIEW B, 1993, 48 (11) :8510-8513

[6] STRUCTURE, DYNAMICS AND ORDERING TRANSITION OF SOLID C-60 [J].

HEINEY, PA .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1992, 53 (11) :1333-1352

[7] CRYSTAL-FIELD AND MOLECULAR-STRUCTURE IN SOLID C-60 [J].

LAMOEN, D ;

MICHEL, KH .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1993, 92 (03) :323-330

[8]

LUPIS CHP, 1983, CHEM THERMODYN, P165

[9]

MCQUARRIE DA, 1976, STATISTICAL MECHANIC, P137

[10] SYNTHESIS AND CHARACTERIZATION OF ALKALI-METAL FULLERIDES - AXC60 [J].

MURPHY, DW ;

ROSSEINSKY, MJ ;

FLEMING, RM ;

TYCKO, R ;

RAMIREZ, AP ;

HADDON, RC ;

SIEGRIST, T ;

DABBAGH, G ;

TULLY, JC ;

WALSTEDT, RE .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1992, 53 (11) :1321-1332

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