作者:P. Melnikov、M. Nalin、Y. Messaddeq
DOI:10.1016/s0925-8388(97)00407-6
日期:1997.11
A new modification of scandium fluoride has been synthesised. The compound is deficient in fluorine, with the composition ScF276. It belongs to the tetragonal system, lattice parameters being a = 3.792 and c = 6.740 Angstrom and may be obtained at low temperatures by the decomposition of the precursor NH4ScF4. The reaction is topotactic, tetragonal parameters of the precursor are a = 4.021 and c = 6.744 Angstrom. Structural relationships with various fluorides and ammonium aminofluorides are discussed. This synthesis route with IR-assisted decomposition should be considered as a soft-chemistry approach. (C) 1997 Elsevier Science S.A.