Crystal and magnetic structure of new ternary uranium intermetallics: U{sub 3}TiX{sub 5} (X = Ge, Sn)
- Univ. de Rennes 1 (France). Lab. de Chimie du Solide et Inorganique Moleculaire
- CEA/Saclay, Gif-sur-Yvette (France). Lab. Leon Brillouin
New compounds with the formula U{sub 3}TiX{sub 5} have been synthesized for X = Ge, Sn. The crystal structure of U{sub 3}TiGe{sub 5} has been refined from single crystal X-ray diffraction data to R(F) = 0.032, R{sub w} = 0.037, and was found to crystallize with the hexagonal U{sub 3}TiSb{sub 5} structure type, with a = 8.495(1) {angstrom} and c = 5.711(1) {angstrom}. Isotypism was found from X-ray powder diffraction analysis for the stannide U{sub 3}TiSn{sub 5}, with a = 9.200(2) {angstrom} and c = 6.128(3) {angstrom}. Magnetic susceptibility measurements carried out on polycrystalline powder samples reveal ferromagnetic type ordering at {Tc} = 76 and 65 K for U{sub 3}TiGe{sub 5} and U{sub 3}TiSn{sub 5}, respectively. Neutron powder diffraction studies of U{sub 3}TiGe{sub 5} show that the uranium magnetic moments have two components: a ferromagnetic component (M{sub F} = 0.9 {mu}{sub B} at 1.4 K) along the c axis and a triangular component (M{sub T} = 0.4 {mu}{sub B} at 1.4 K) in the hexagonal plane antiferromagnetically ordered along the c axis.
- OSTI ID:
- 351512
- Journal Information:
- Journal of Solid State Chemistry, Vol. 144, Issue 2; Other Information: PBD: May 1999
- Country of Publication:
- United States
- Language:
- English
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