| Abstract: | On Oxothorates of the Alkaline Metals: K3NaTh2O6 For a first time single crystals of a (in addition: new) oxothorate were prepared starting with the binary oxides [1 200°C, 4d, then 1 300°C, 5d, Ni-bomb; powder: 650°C, 10d, Ag-bomb]. The colourless, transparent single crystals are monoclinic, C2/c, a = 629.64 pm, b = 1 089.93 pm, c = 1 259.75 pm, β = 99.66°, z = 4, Dx = 5.458 g cm?3 and Dpyc = 5.456 gcm?3. It is an ordered variant of the NaCl-type; MoKα, fourcircle diffractometer data (PW 1100), R = 7.67 and Rw = 7.35% for 1 083 of 1 236 I0 (hkl). The Madelung Part of Lattice Energy, MAPLE, is calculated and discussed. |
