ChemInform Abstract: 119Sn Moessbauer Spectroscopy and Physical Properties of Phases of the SnS2‐Tl2S System.

Abstract

016ChemInform Abstract Four compounds of the title system (Tl4Sn5S12, Tl2Sn2S5, Tl2SnS3, Tl4SnS4) have been isolated. Results of Mössbauer spectroscopy indicate a 4, 5, and 6 fold coordination of the Sn atoms. The phases show a quasi-semiconductor behavior with n electronic gap of 1.17 to 1.51 eV (electrical conductivity and optical absorption measurements).

Field-Induced Spin-Flop in Antiferromagnetic Semiconductors with Commensurate and Incommensurate Magnetic Structures: Li2FeGeS4 (LIGS) and Li2FeSnS4 (LITS)

“…The 119 Sn Mössbauer spectrum contains a pronounced main doublet with δ = 1.28 mm/s and Δ E Q = 0.28 mm/s (Figure and Table S10 in the Supporting Information) that corresponds to one crystallographically unique Sn 4+ . This result is in close proximity to the single broad absorption peak (a macroscopically unresolved doublet) in the range of 1.45–1.48 mm/s observed for tetravalent tin in SnS 4 tetrahedra within stannite. ,, Sn 4+ ions in SnS 4 tetrahedra in the ternary tin sulfides Na 4 SnS 4 , Ba 2 SnS 4 , Na 6 Sn 2 S 7 , Ba 3 Sn 2 S 7 , and Tl 2 SnS 3 give rise to δ values ranging from 1.17 to 1.23 mm/s . In contrast to our results, octahedral Sn 4+ ions in Sn 2 S 3 and SnS 2 yield δ values of 1.09–1.19 mm/s and 1.01−1.06 mm/s, , respectively.…”

Tl4SnS3, Tl4SnSe3 and Tl4SnTe3 crystals as novel IR induced optoelectronic materials

“…Up today several thallium containing chalcogenide ternary systems were studied. Among them Tl-Sn-S [5][6][7], Tl-Sn-Se [8][9][10] and Tl-SnTe [11][12][13]. Thallium and tin in their low oxidation state have a free doublet of electrons, which could create a stereochemical action and define mechanisms of career transport.…”

“…3) (following the structural data [5][6][7]) are outside the sum of ionic radii of the respective atoms such clusters (cubes) are formed by positively charged atoms and individual cation or anion pairs of atoms. The later form a ground state dipole moments with magnitudes higher than 5 D. Such magnitudes of ground dipole moments can manifest itself interesting piezoelectric and photoinduced nonlinear optical features.…”

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

“…4,5 Therefore, several thallium containing chalcogenide ternary single crystals have been explored. Among them are the Tl-Sn-S, [6][7][8] Tl-Sn-Se [9][10][11] and Tl-Sn-Te [11][12][13][14] systems. Thallium and tin in their low oxidation state possess a free doublet of electrons, which could have a stereochemical action and dene the material transport properties.…”