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-Li₂PbO₃ have been prepared by decomposition of K₂Li₆[Pb₂O₈] [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)⁺/Pb⁴⁺ 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.