Abstract: The material properties of tungsten bronze type structure are very good. The structure of tewiteis more unique and its scientific application is worth exploring, but the natural tewite is very rare, so itssynthesis is important. In the study, pure-phase K-type tewite structure compounds were synthesized:XRD, SEM,TC-DTA, etc. were used to characterize the resulting materials. The conclusions are as follows: 1) The synthesis conditions of K-type tewite are 1/2H₂O、TeO₂、WO₃WO were used as raw
materials and kept at 650 °C for 3 days by solid-phase synthesis method; 2) The K-type tewite structurecompound is completely consistent with the natural tellurite structure , and the refined unit cell parametersare: a =7.265 1(4)A,b = 25.798 0( 14)A,c =3.818 2(2)A，c=3.8182(2)A，α=β=γ=90°，V=716，,orthorthombic, space group pban; 3) K-type tewite structure compound has a thermal decomposition tempera.ture of over 800 C , and the thermal stability is good.

Key words: tewite；structure of tungsten bronze type, solid state synthesis method, characterization