CHARACTERIZATION OF NOVEL TERNARY URANIUM SILICIDES AND GERMANIDES WITH THE U2MO3SI4 STRUCTURE TYPE IN THE U-(MO,W,V)-(SI,GE) SYSTEMS

被引：10

作者：

LE BIHAN, T

NOEL, H

机构：

[1] Laboratoire de Chimie du Solide et Inorganique Moléculaire, URA CNRS 1495, Université de Rennes I, 35042 Rennes Cédex, Avenue du General Leclerc

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1995年 / 227卷 / 01期

关键词：

CRYSTAL STRUCTURE; MAGNETIC PROPERTIES; TERNARY URANIUM SILICIDES; TERNARY URANIUM GERMANIDES;

D O I：

10.1016/0925-8388(95)01628-7

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：

Novel compounds, U2W3Si4, U(0)2Mo(3)Ge(4) and U2V3Ge4, have been synthesised by argon are melting, using the correct elemental compositions. The crystal structures of U2W3Si4 (a=6.847(5) Angstrom, b=6.858(1) Angstrom, c=6.767(9) Angstrom, beta=109.77(1)degrees) and of U2Mo3Ge4 (a=7.016(4) Angstrom, b=6.995(2) Angstrom, c=6.949 Angstrom, beta=110.21(2)degrees) have been determined from single-crystal X-ray data. They have been shown to be isotypic with U2Mo3Si4 (a=6.876(3) Angstrom, b=6.883(1) Angstrom, c=6.760(3) Angstrom, beta=109.79(2)degrees, space group P2(1)/c, Z=2). From X-ray powder intensity data, U2V3Ge4 (a=6.986(1) Angstrom, b=6.976(1) Angstrom, c=6.927(1) Angstrom, beta=109.94(2)degrees) was found to crystallize in the same structure type. U2V3Ge4 is ferromagnetic below T-c=60 K whereas U2W3Si4, U2Mo3Si4 and U2Mo2Ge4 do not show any ferromagnetic transition at low temperature.

引用

页码：44 / 48

页数：5

共 5 条

[1]

BODAK OI, 1984, IAN SSSR NEORG MATER, V20, P853

[2]

Frenz B.A, 1978, COMPUTING CRYSTALLOG, P64

[3]

Hill H. H., 1970, PLUTONIUM 1970 OTHER, P2

[4]

SIKIRITSA LG, 1978, 3RD C UN INT COMP CR, P11

[5] AN EMPIRICAL-METHOD FOR CORRECTING DIFFRACTOMETER DATA FOR ABSORPTION EFFECTS [J].

WALKER, N ;

STUART, D .

ACTA CRYSTALLOGRAPHICA SECTION A, 1983, 39 (JAN) :158-166

← 1 →