Uranium pentafluoride an inorganic chemical consisting of uranium and fluorine. The compound exists both as individual UF 5 molecular entities and with extended order in several crystal-lattice forms. The monomer, formed by photolysis of uranium hexafluoride, has a square pyramidal geometry. The α form is a linear [1 ] coordination polymer consisting of chains in which one of the five fluoride atoms forms a bridge to the next uranium atom. Uranium pentafluoride can be synthesized in the α form by [2 ] reducing uranium hexafluoride with sulfur dioxide at 160 °C. The β form, which gradually converts to the α form at 180 °C, [3 ] has a [2 ] square antiprismatic lattice structure. [4 ]
References [ edit ]
^ Onoe, J.; Nakamatsu, H.; Mukoyama, T.; Sekine, R.; Adachi, H.; Takeuchi, K. (1997). "Structure and Bond Nature of the UF 5 Monomer". Inorg. Chem. 36 (9): 1934–1938. doi: 10.1021/ic961237s.
^ a b Howard, C. J.; Taylor, J. C.; Waugh, A. B. (1982). "Crystallographic parameters in α-UF 5 and U 2F 9 by multiphase refinement of high-resolution neutron powder data". Journal of Solid State Chemistry 45 (3): 396–398. Bibcode: 1982JSSCh..45..396H. doi: 10.1016/0022-4596(82)90185-2.
^ Eller, P. G.; Larson, A. C.; Peterson, J. R.; Ensor, D. D.; Young, J. P. (1979). "Crystal structures of α-UF 5 and U 2F 9 and spectral characterization of U 2F 9". Inorganica Chimica Acta 37 (2): 129–133. doi: 10.1016/S0020-1693(00)95530-0.
^ Taylor, J. C.; Waugh, A. B. (1980). "Neutron diffraction study of β-uranium pentafluoride between 77 and 403 K". Journal of Solid State Chemistry 35 (2): 137–147. Bibcode: 1980JSSCh..35..137T. doi: 10.1016/0022-4596(80)90485-5.