Copper polytellurite-chlorides with A2 + cations (ACd, Pb) obtained by CVT reactions

Abstract Two novel polytellurite-chlorides Pb 5 Cu 2 (Te 4 O 11 )Cl 8 ( 1 ) and CdCu 2 (Te 3 O 8 )Cl 2 ( 2 ) were obtained by a chemical vapor transport (CVT-reactions) reactions. The structure of 1 is based on [Pb 5 Cu 2 (Te 4 O 11 )] 8 + one-dimensional blocks with full and partially occupied Cl sites around. The structure of 2 can be described as being formed by two types of one-dimensional units formed by Cd,Cu-centered polyhedra and TeO 3 , TeO 4 pyramids sharing via common O atoms into electroneutral [CdCu 2 (Te 3 O 8 )Cl 2 ] 0 sheets. Obtaining of novel polytellurite-chlorides demonstrates effectiveness of CVT techniques for preparation of different tellurite-based complex layered materials.