Preparation chimioue et structure cristalline des tellurites de sodium et d'argent: Na2TeO3, Ag2TeO3

Sodium and silver tellurites are isotypic. The space group is $\text{P}\text{2}{}_1\text{a}$. For Ag₂TeO₃, the parameters of the monoclinic unit cell are: a = 7.000(2), b = 10.509(5), $\text{c}\text{= 4.911(2)}\text{A}\text{?}$, β = 91°51(5). The structures of sodium and silver tellurites has been determined. For Ag₂TeO₃, a R value of 0.047 is reached with 829 reflexions and for Na₂TeO₃ R = 0.024 with 1125 reflexions. The framework is built with MeO₆ edge sharing octahedra, Me = Ag,Te. Ag₂TeO₃ is a distortion of NaCl Structure.