Über Oxoplumbate(IV). Die Kristallstruktur von TT-Li₂PbO₃ [1] .On Oxoplumbates(IV) The Crystal Structure of LT-Li₂PbO₃ [1]

Abstract

For the first time single crystals of LT-Li 2 PbO 3 have been prepared by decomposition of K 2 Li 6 [Pb 2 O 8 ] [Incompletely closed Ag cylinders, sealed in Supremax-glass ampoule, vacuum, 690 °C, 100 d]. The structure determination [533Io(hkl); four-circle-diffractometer PW 1100, ω - scan, Mo - K α , R = 4,86%, R w = 4,93% confirms space group C2/c with a = 544.52(7), b = 926.12(7), c = 547,56(8) pm, β = 111.216(13)°, Z = 4, d rö = 6.94 g · cm -3 , d pyk = 6.89 g · cm -3 . The NaCl-type structure variant is characterized by alternating layers of Li(2) + and Li(l) + /Pb 4+ cations. All atoms have octahedral coordination. The Madelung Part of Lattice Energy, MAPLE, Effective Coordination Numbers, ECoN, these via Mean Fictive Ionic Radii, MEFIR, are calculated.