SYNTHESIS, SPECTROSCOPIC, AND MAGNETIC-PROPERTIES OF RUBIDIUM HEPTACHLORODIURANATE(III)

The synthesis of rubidium heptachlorodiuranate(III) together with some of its structural, spectroscopic, and magnetic properties are reporte d, Unit cell parameters were determined from X-ray powder diffraction data, Uranium(3+) doped single crystals of RbY2Cl7 have been grown by the Bridgman-Stockbarger method. The Raman and infrared spectra of RbU 2Cl7 as well as the electronic absorption spectrum of RbY2Cl7: U3+ (1% ) at 4.2 K have been recorded and are discussed. Magnetic susceptibili ty measurements were carried out by the Faraday method in the 4.2-300 K range. The Curie-Weiss law is followed in the 210-300 K range with t he paramagnetic constants mu(eff) = 3.74 mu(B), C = 1.750 emu . K . mo le(-1), and theta = -80 K. (C) 1996 Academic Press, Inc.