Proprietes electriques et optiques de composes sulfures d'etain (II)

The influence of replacing Se by Te on electronic structure and optical properties of Tl4PbX3(X = Se or Te): experimental and theoretical investigations

“…All the ternaries are crystallized in the tetragonal 4/mmm crystallographic point group. But the symmetry of Tl 4 SnS 3 (Se 3 ) is lower (space group P4/nmm) 15,16 compared to Tl 4 SnTe 3 (space group I4/mcm). 17 The thallium compounds possess some specic features 18 due to the high polarizability of the Tl ions.…”

Interactions in the ternary reciprocal system Tl2S+SnTe↔Tl2Te+SnS

“…To increase the scope of their use, an investigation of the physico-chemical interaction in systems based on the compounds Tl 4 SnS 3 (Te 3 ) seemed promising. The two ternary compounds crystallize in isotypic tetragonal structures [2,3], which indicates a high probability of formation of a solid solution.…”

Crystal structure of the Tl4PbSe3 ternary compound

“…In the systems Tl 2 Y-XY (X = Sn, Pb; Y = S, Se, Te) Tl 4 XY 3 ternaries were obtained [1][2][3][4][5][6][7][8][9][10] except for the pseudobinary system Tl 2 Se-PbSe. The observed Tl 4 XY 3 compounds crystallize in isotypic tetragonal crystal structures, however, the crystal structures of Tl 4 PbS 3 and Tl 4 PbSe 3 were not established.…”