Crystal structure of tetrapotassium hexatellurodistannate, K4Sn2Te6

Evenson, Carl R.; Dorhout, Peter K.

doi:10.1515/ncrs-2000-0305

Cited by 5 publications

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“…Compounds, such as Na 4 SnTe 4 and Na 5 InTe 4 , contain discrete units of [SnTe 4 4– ] and [InTe 4 5– ], respectively. Other examples of [M x Q y n – ] units include the [Sn 2 Te 7 4– ] dimers in Ba 2 SnTe 5 , the [Sn 2 Te 6 4– ] moieties in K 4 Sn 2 Te 6 , the [Si 4 Te 10 4– ] clusters in K 4 Si 4 Te 10 , and the infinite chains of [MTe 3 3– ] and [GeTe 3 2– ] in BaM 2 Te 4 (M = Al, Ga, In) and Ba 2 GeTe 5 , respectively. Apart from MQ 4 units, a few compounds also contain ethane-like [Ge 2 Te 6 6– ] units with homonuclear Ge–Ge bonds, for example, Ba 2 Ge 2 Te 5 .…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterizations of Two Tellurides β-BaGa₂Te₄ and Ba₅Ga₂Ge₃Te₁₂ with Flexible Chain Structure

et al. 2021

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Demands for IR birefringent materials are increasing due to the rapid developments of IR laser applications. Herein, two new chain tellurides β-BaGa2Te4 and Ba5Ga2Ge3Te12 have been discovered. β-BaGa2Te4 crystallizes in the orthorhombic space group Imma (no. 74) with unit cell constants of a = 23.813(3) Å, b = 11.9673(19) Å, and c = 6.7215(9) Å, while Ba5Ga2Ge3Te12 crystallizes in the monoclinic space group P21/c (no. 14) with unit cell constants of a = 13.6540(3) Å, b = 9.6705(2) Å, and c = 23.1134(7) Å. The structure of β-BaGa2Te4 can be considered to be the antiparallel arrangement of one-dimensional (1D) [GaTe2] chains formed by edge-sharing GaTe4 tetrahedra, which are separated by Ba2+ cations. In the crystal structure of Ba5Ga2Ge3Te12, two kinds of 1D chains, namely chain 1 ∞ 1[(GaGe)3Te8] and chain 2 ∞ 1[(GaGe)2Te4], are stacked alternately and put together by the coulomb force with Ba2+ cations. In addition, First-principles calculations indicate that β-BaGa2Te4 has a large birefringence, ∼0.325 at 2050 nm, derived from the superposition of the polarizabilities of GaTe4 tetrahedra, implying that it has potential as an IR birefringent material. This work may provide some guidance for exploring new IR birefringent crystals.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Characterizations of Two Tellurides β-BaGa₂Te₄ and Ba₅Ga₂Ge₃Te₁₂ with Flexible Chain Structure

et al. 2021

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“…Tetrahedral [SnE 4 ] 4À (E = S, Se, Te) anions exhibit a characteristic tendency to condense in polar solvents to generate corner-or edge-bridged oligomeric or polymeric chalcogenidostannates(IV) (Sheldrick & Wachhold, 1997Sheldrick, 2000). Ditetrahedral anions [Sn 2 E 6 ] 4À composed of two edge-sharing tetrahedra are particularly common and have been structurally characterized for E = Te in the salts Li 4 [Sn 2 Te 6 ]Á8en , K 4 [Sn 2 Te 6 ] (Evenson & Dorhout, 2000), K 2 [K(2,2,2-crypt)] 2 [Sn 2 Te 6 ] (Campbell et al, 1996) (Huffman et al, 1984), (Et 4 N) 2 [Sn 2 Te 6 ] (Ansari et al, 1993), [M(en) 3 ] 2 [Sn 2 Te 6 ] (M = Mn, Zn) (Li et al, 1998), [Zn(en) 3 ] 2 [Sn 2 Te 6 ]Áen (Shreeve-Keyer et al, 1997) and (enH) 4 Sn 2 Te 6 Áen , where 2,2,2-crypt is 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane and en is ethylenediamine. Interestingly, the telluridostannates(IV) [M(en) 3 ] 2 Sn 2 Te 6 are not isostructural, but crystallize in the space groups Pbca (M = Mn) and P2 1 /n (M = Zn).…”

Section: Commentmentioning

confidence: 99%

Bis[tris(ethylenediamine)manganese(II)] di-μ-tellurido-bis[ditelluridostannate(IV)] (monoclinic modification)

Kromm

Sheldrick

2005

Acta Cryst E

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“…Dimeric edge-sharing T 2 Q 6 -tetrahedral dimers exist in the Rb 4 Sn 2 Se 6 , Cs 4 Sn 2 Se 6 , K 4 Sn 2 Te 6 , and K 4 Sn 2 Se 6 type structures for ternary compounds containing an alkali metal, a tetrel ( T = Si, Ge, Sn), and a chalcogenide ( Q = S, Se, Te). All known representatives containing such anionic units are listed in Table .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Na₄Si₂Se₆-tP24 and Na₄Si₂Se₆-oP48, Two Polymorphs with Different Anionic Structures

et al. 2023

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Two different polymorphs of the new selenosilicate Na 4 Si 2 Se 6 were synthesized by solid-state reactions. The hightemperature polymorph Na 4 Si 2 Se 6 -tP24 crystallizes in the tetragonal space group P4 2 /mcm (No. 132) with lattice parameters a = 7.2793(2) Å, c = 12.4960(4) Å, and V = 662.14(3) Å 3 . The main structural motifs are isolated Si 2 Se 6 units of two edge-sharing SiSe 4 tetrahedra. The high-pressure/low-temperature polymorph Na 4 Si 2 Se 6 -oP48 crystallizes in the orthorhombic space group Pbca (No. 61) with lattice parameters a = 12.9276(1) Å, b = 15.9324(1) Å, c = 6.0349(1) Å, and V = 1243.00(2) Å 3 showing zweier single chains ∞ 1 [Si 2 Se 6 ] 4− . The lattice parameters of Na 4 Si 2 Se 6 -tP24 were determined by single-crystal X-ray diffraction, whereas those of Na 4 Si 2 Se 6 -oP48 were investigated by powder X-ray diffraction. Both modifications crystallize in new structure types. An energetic comparison of the two polymorphs and further hypothetical structure types was carried out by density functional theory modeling. Calculations reveal that the polymorphs are very close in energy (ΔE = 3.4 kJ mol −1 ). Impedance spectroscopic measurements show ionic conductivity (σ spec = 1.4 × 10 −8 S cm −1 at 50 °C and 6.8 × 10 −6 S cm −1 at 200 °C) with an activation energy of E A = 0.54(2) eV for Na 4 Si 2 Se 6 -oP48.

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Crystal structure of tetrapotassium hexatellurodistannate, K4Sn2Te6

Cited by 5 publications

References 0 publications

Synthesis and Characterizations of Two Tellurides β-BaGa₂Te₄ and Ba₅Ga₂Ge₃Te₁₂ with Flexible Chain Structure

Synthesis and Characterizations of Two Tellurides β-BaGa₂Te₄ and Ba₅Ga₂Ge₃Te₁₂ with Flexible Chain Structure

Bis[tris(ethylenediamine)manganese(II)] di-μ-tellurido-bis[ditelluridostannate(IV)] (monoclinic modification)

Synthesis and Characterization of Na₄Si₂Se₆-tP24 and Na₄Si₂Se₆-oP48, Two Polymorphs with Different Anionic Structures

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Crystal structure of tetrapotassium hexatellurodistannate, K4Sn2Te6

Cited by 5 publications

References 0 publications

Synthesis and Characterizations of Two Tellurides β-BaGa2Te4 and Ba5Ga2Ge3Te12 with Flexible Chain Structure

Synthesis and Characterizations of Two Tellurides β-BaGa2Te4 and Ba5Ga2Ge3Te12 with Flexible Chain Structure

Bis[tris(ethylenediamine)manganese(II)] di-μ-tellurido-bis[ditelluridostannate(IV)] (monoclinic modification)

Synthesis and Characterization of Na4Si2Se6-tP24 and Na4Si2Se6-oP48, Two Polymorphs with Different Anionic Structures

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Synthesis and Characterizations of Two Tellurides β-BaGa₂Te₄ and Ba₅Ga₂Ge₃Te₁₂ with Flexible Chain Structure

Synthesis and Characterizations of Two Tellurides β-BaGa₂Te₄ and Ba₅Ga₂Ge₃Te₁₂ with Flexible Chain Structure

Synthesis and Characterization of Na₄Si₂Se₆-tP24 and Na₄Si₂Se₆-oP48, Two Polymorphs with Different Anionic Structures