Wydział Chemii

Mirosław Karbowiak

Janusz Drożdżyński

1998

Journal of Alloys and Compounds

271-273

863-866

10.1016/S0925-8388(98)00235-7

Naukowa

Angielski

Artykuł

Uranium(III) chloro complexes of the formulas SrUCl₅ and Ba₂UCl₇ were synthesized and characterized by electronic absorption spectra, X-ray powder diffraction and magnetic susceptibility investigations. Ba₂UCl₇ crystallizes in the monoclinic system, P2₁/c, with a=7.20 Å, b=15.61 Å, c=10.66 Å, β=91.1° and Z=4. Magnetic susceptibilities of polycrystalline samples of the compounds were measured on a SQUID magnetometer in the 1.7–300 K range. The inverse magnetic susceptibility versus temperature plots of SrUCl₅ and Ba₂UCl₇ follow the Curie–Weiss law above 90 and 105 K, respectively. The following paramagnetic constants from the Curie–Weiss law C=χ_M(T−Θ) have been obtained: C=1.653 emu·K·mol⁻¹, Θ=−127 K, μ_eff=2.84=3.65 B.M. (for SrUCl₅) and C=1.310 emu·K·mol⁻¹, Θ=−95 K, μ_eff=3.25 B.M. (for Ba₂UCl₇). Solid state electronic spectra of the compounds have been recorded in the 4000–30 000 cm⁻¹ range and are discussed.

Uranium(III) chloro complexes, Synthesis, Magnetic susceptibilities, Electronic absorption spectra, X-ray powder diffraction data

https://doi.org/10.1016/S0925-8388(98)00235-7

http://www.elsevier.com