The Oxides and Oxyacids of Tellurium

Abstract

A critical review of the oxides and oxyacids of tellurium is presented. The crystal chemistry of the compounds is discussed in detail. The average bond distances and angles of the Te(IV)O4, Te(VI)O6, Te(VI)-O-H...O-Te(VI) and Te-O-Te groups have been calculated by statistical evaluation of the geometry of the structures. The deviation of Te(VI)O6 from the average geometry were quantitatively characterized by distortion indices. The Te(IV)O4 and Te(VI)O6 groups were evaluated also by the bond valences s(Te-O). The compounds whose distortion indices or Σs(Te-O) values were outside the interval x ± 3σ should be checked.