Crystal structure and ionic conductivity of crystalline and glassy Na2PbP2O7

被引：39

作者：

Dridi, N

Boukhari, A

Réau, JM

Arbib, E

Holt, EM

机构：

[1] Univ Mohammed Agdal 5, Lab Associe Francophone 501, Lab Chim Solide Appl, Rabat, Morocco

[2] Inst Chim Mat Condensee Bordeaux, F-33608 Pessac, France

[3] Fac Sci, Dept Chem, Kenitra, Morocco

[4] Oklahoma State Univ, Dept Chem, Stillwater, OK 74078 USA

来源：

SOLID STATE IONICS | 2000年 / 127卷 / 1-2期

关键词：

phosphate structure; ceramic and glass; ionic conductivity; sodium;

D O I：

10.1016/S0167-2738(99)00277-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Single crystals of the double phosphate Na2PbP2O7 have been prepared by melting using phosphate flux. Na2PbP2O7 is of triclinic symmetry with the space group P (1) over bar (Z = 2), the unit cell parameters are a = 5.533(4) Angstrom, b = 6.942(4) Angstrom, c = 9.440(4) Angstrom, alpha = 105.58(2)degrees, beta = 97.03(4)degrees, gamma = 108.32(4)degrees, d(cal) = 4.386 g cm(-3). The lattice of Na2PbP2O7 consists of corner-shared structural units [Pb2P4O14](4-) which form ribbons parallel to the [010] direction. The [Pb2P4O14](4-) units result from the association of corner-shared PbO5 polyedra and P2O7 pyrophosphate groups. The Na+ ions are located between ribbons. Glasses with the same composition as the crystalline phase have been also isolated. A study of transport properties of Na2PbP2O7 in the crystalline and glassy forms is reported. (C) 2000 Elsevier Science BN. All rights reserved.

引用

页码：141 / 149

页数：9

共 39 条

[1] THE ACTIVATION ENTROPY FOR TRANSPORT IN IONIC CONDUCTORS [J].