The compound Tl_4Cu_4(P_2O_7)_3, a new three-dimensional structure with interconnected tunnels

摘要

Tl_4Cu_4(P_2O_7)_3 has the following crystallographic features: orthorhombic space group Pcca with a = 20.171(2), b = 10.558(1), c = 9.676(1) A and Z = 4. A total of 1303 reflections with 1>2(1) were used for structure solution and refinements. The agreement factors R_1 and WR~2 converged to 0.040 and 0.093, respectively. GOF = 1.103. Tl_4Cu_4(P_2O_7)_3 presents a three-dimensional structure, its anionic framework consists of corner sharing CuO_5 polyhedra and P_2O_7 groups delimiting several types of interconnected tunnels wherein the thallium cations reside.