Synthesis, crystal structure, and optical properties of CeMn0.5OSe

被引：27

作者：

Ijjaali, I ^{[1
]}

Mitchell, K ^{[1
]}

Haynes, CL ^{[1
]}

McFarland, AD ^{[1
]}

Van Duyne, RP ^{[1
]}

Ibers, JA ^{[1
]}

机构：

[1] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2003年 / 176卷 / 01期

基金：

美国国家科学基金会;

关键词：

cerium manganese oxyselenide; synthesis and X-ray structure; band gap;

D O I：

10.1016/S0022-4596(03)00385-2

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The new quaternary selenide CeMn0.5OSe has been synthesized by the reaction of Ce, Mn, Se, and SeO2 at 1223 K. This compound crystallizes in space group P4/nmm of the tetragonal system with two formula units in a cell of dimensions at 153 K of a = 4.0260(7) Angstrom, c = 9.107(2) Angstrom. CeMn0.5OSe has the LaAgOS structure type. It is built from [CeO] fluorite-like layers where Ce4O tetrahedra share Ce-Ce edges that alternate with [MnSe] anti-fluorite like layers along [001]. An optical band gap of 2.01 eV has been derived from absorption measurements on the (100) crystal face of a CeMn0.5OSe single crystal. (C) 2003 Elsevier Inc. All rights reserved.

引用

页码：170 / 174

页数：5

共 47 条

[1] CRYSTAL STRUCTURE OF TERNARY SILICIDES THM2SI2 (M-CR,MN,FE,CO,NI AND CU) [J].