SYNTHESIS AND CHARACTERIZATION OF NOVEL TERNARY URANIUM GERMANIDES WITH NIOBIUM AND TANTALUM

Authors
LEBIHAN T NOEL H ROGL P
Citation
T. Lebihan et al., SYNTHESIS AND CHARACTERIZATION OF NOVEL TERNARY URANIUM GERMANIDES WITH NIOBIUM AND TANTALUM, Journal of alloys and compounds, 213, 1994, pp. 540-544
Citations number
8
Categorie Soggetti
Chemistry Physical","Metallurgy & Mining","Material Science
Journal title
Journal of alloys and compounds → ACNP
ISSN journal
09258388
Volume
213
Year of publication
1994
Pages
540 - 544
Database
ISI
SICI code
0925-8388(1994)213:<540:SACONT>2.0.ZU;2-X
Abstract
Novel compounds, U2Nb3Ge4 and U2Ta3Ge4, have been synthesized by argon are melting the elemental combinations. The crystal structure of U2Nb 3Ge4 (a=7.0178(6) Angstrom, b=13.473(2) Angstrom, c=7.1500(7) Angstrom ; space group, Pnma; Z = 4) has been determined from single-crystal X- ray counter data to be isotypic with the ordered Sm5Ge4 type. U2Ta3Ge4 (a=7.015(2) Angstrom, b=13.454(3) Angstrom, c=7.139(2) Angstrom) from X-ray powder intensity data was found to crystallize with the same at om order as U2Nb3Ge4. U2Nb3Ge4 and U2Ta3Ge4 are ferromagnets below T-c =130 K and 105 K respectively.