Samples of potassium tungstate antimonates were prepared by calcining αK2CO3-βSb2O3-2(1–α–β)WO3 mixtures in air. The distributions of the constituent ions and lattice defects over the crystallographic positions of space group Fd3m were deduced from structural and gravimetric data. The alternating-current conductivity of the potassium tungstate antimonates was measured from 600 to 1000K. The conductivity and its activation energy were shown to be related to the concentrations of cation (position 16d) and anion (position 8b) defects.

Ion-Conducting Defect Pyrochlore Phases in the K2O–Sb2O3–WO3 System. V.A.Burmistrov, D.A.Zakharevich: Inorganic Materials, 2003, 39[1], 68-71