Calcium insertion in the Na4Mn9O18 tunnel structure:: Na1.1Ca1.8Mn9O18

被引：12

作者：

Floros, N ^{[1
]}

Michel, C ^{[1
]}

Hervieu, A ^{[1
]}

Raveau, B ^{[1
]}

机构：

[1] Inst Sci Mat & Rayonnement, Lab CRISMAT, UMR CNRS 6508, F-14050 Caen, France

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2001年 / 162卷 / 01期

关键词：

D O I：

10.1006/jssc.2001.9338

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new mixed valent manganese oxide, Na1.1Ca1.8Mn9O18, with a tunnel structure closely related to that of Na4Mn9O18 has been synthesized. It crystallizes in the Pnma space group with a 26.418(2) Angstrom, b = 5.6468(4) Angstrom, and c = 9.1384(8) Angstrom. Its structural study, combining X-ray powder diffraction and electron microscopy, shows that the [Mn9O18](infinity) framework is similar to that of Na4Mn9O18, forming large S-shaped and six-sided tunnels running along b. In contrast, the positions and distributions of calcium in the tunnels are different from those obtained for sodium in Na4Mn9O18, explaining the doubling of the periodicity along the tunnel axis direction. The insulating properties of these oxides agree with a tendency to ordering of the Mn3+ and Mn4+ species indifferent sites. (C) 2001 Academic Press.

引用

页码：34 / 41

页数：8

共 14 条

[11] STRUCTURE OF NA4MN4TI5O18 [J].

MUMME, WG .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL CRYSTALLOGRAPHY AND CRYSTAL CHEMISTRY, 1968, B 24 :1114-&

[12] DEFECTS AND PHASE-TRANSITION IN MONOCLINIC NATURAL HOLLANDITE - BAXMN8O16 [J].

NISTOR, LC ;

VANTENDELOO, G ;

AMELINCKX, S .

JOURNAL OF SOLID STATE CHEMISTRY, 1994, 109 (01) :152-165

[13] NEW PHASES OF FORMULA NA(X)MNO2 (X LESS THAN OR EQUAL TO 1) [J].

PARANT, JP ;

OLAZCUAG, R ;

DEVALETT, M ;

FOUASSIE.C ;

HAGENMUL.P .

JOURNAL OF SOLID STATE CHEMISTRY, 1971, 3 (01) :1-+

[14] THE CRYSTAL STRUCTURE OF PSILOMELANE, (BA, H2O)2MN5O10 [J].

WADSLEY, AD .

ACTA CRYSTALLOGRAPHICA, 1953, 6 (06) :433-438

← 1 2 →