The Crystal Structure of Tl2Te3 - a Reinvestigation

Doert, Th.; Böttcher, P.; Cardoso‐Gil, Raúl

doi:10.1002/(sici)1521-3749(199912)625:12<2160::aid-zaac2160>3.0.co;2-j

Cited by 21 publications

(5 citation statements)

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“…The Te atoms in Tl 2 Te 3 , for example, have a valence electron concentration (VEC(Te)) of 6⅔, forming an infinite Te chain that can be described as polymerized linear Te 3 4– fragments (Figure 7). The bonds between the Te 3 4– units decrease the negative charges, leading to the description

{}_{\infty}^{1}[

Te 3 2– ] [66]. Two different distances were found in this chain due to different bonding situations.…”

Section: Resultsmentioning

confidence: 99%

Solid State Polyselenides and Polytellurides: A Large Variety of Se–Se and Te–Te Interactions

et al. 2009

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A large variety of different interactions between the chalcogen atoms, Q, occur in the solid state structures of polyselenides and polytellurides, including both molecular and infinite units. The simplest motifs are classical Q22– dumbbells and nonlinear Qn2– chains (n = 3, 4, 5, ..), e.g. found in alkali metal polychalcogenides. In addition, nonclassical so-called hypervalent motifs exist in the form of linear Q34– units or within larger units such as Q44– and Q54–. Infinitely extended Q units include zigzag, cis/trans and linear chains, as well as planar and slightly puckered layers. Several of those are susceptible to Peierls distortions, leading to the formation of both commensurate and incommensurate superstructures and anomalies in transport properties, including metal-nonmetal transitions.

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{}_{\infty}^{1}[

Te 3 2– ] [66]. Two different distances were found in this chain due to different bonding situations.…”

Section: Resultsmentioning

confidence: 99%

Solid State Polyselenides and Polytellurides: A Large Variety of Se–Se and Te–Te Interactions

et al. 2009

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“…Further studies have also indicated the existence of a Tl 2 Te [ 120 ] phase which was not previously detected ( Figure ). [ 107,120,122–124 ]…”

Section: Thallium Chalcogenidesmentioning

confidence: 99%

“…[ 114 ] Thallium presents both the 1:1 phase [ 58,103,114–117 ] as well as Tl(I) rich phases [ 111,118–122 ] or Q‐rich phases (especially with Te). [ 107,122–125 ] Being at the end of the transition series, group III cations do not possess an open d‐shell, thus most of them present covalent bonding with chalcogenides. [ 126 ] Although some ionic character in Al, [ 112,113,127 ] and Tl chalcogenides [ 128,129 ] has been observed, where the latter of Tl 2 Se and Tl 2 Te melt in a liquid state.…”

Section: Introductionmentioning

confidence: 99%

A New, Thorough Look on Unusual and Neglected Group III‐VI Compounds Toward Novel Perusals

Guzzetta

Jellett

Azadmanjiri

et al. 2023

Small

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been permitted. [4][5][6][7] Although, the employment of 2D nanosheets, especially in biomedicine, is still in its primordial state and has permitted to the realization of novel advancements in such applications. [8][9][10] It needs to be highlighted that some of these compounds present mild cytotoxicity and dose-dependent induced metabolic disadvantages. [11,12] Albeit direct use in the body is not yet advisable, it is possible to indirectly employ these compounds in the creation of wearable devices for tracking vital parameters. [13] Research on such topics, both from fundamental and applied studies has led to an exponential increase in the number of publications during the last 10 years (Figure 1c). [14] One of the pivotal characteristics of 2D nanostructures is their high specific area-to-thickness ratio, which can be easily modulated through delamination processes. [15] Ultimately, the smallest crystals that can be created are mono-or bi-atomic layers. To understand how the nanocrystals form from bulk, it is important to comprehend the main characteristic features of the macrocrystals. A layered crystal lattice is presented in Figure 2. These crystals are governed by strong, covalent (or ionic) in-plane bonds, which are often arranged into hexagonal honeycombs. These individual sheets are linked together by inter-plane (inter-layer), and weak van der Waals (vdW) forces. The bond energies between the in-plane atoms, are the major contribution on the total energy of the lattice, leaving weak inter-plane interactions with relatively large distances (i.e., about few hundred picometers in graphene). These large inter-planar spaces are suitable attack points for size reduction, [16][17][18] which requires an external energy input from a providing source in order to delaminate single-layer crystals.The in-plane honeycomb structure is responsible for electrical transport and associated phenomena. For instance, the great mobility of p-electrons and their delocalization on the surface allows excellent transport in graphene. [23,24] However, in some other electro-and photoactivated semiconductors based on 2D materials, the electrical transport on the surface is responsible for the hole-electron confinement. [25] It can also produce poor electrical conduction by 2D materials such as hexagonal boron nitride (hBN) and so making them electrical insulators (see Figure 1a). [26] These differences in the layersThe attention on group III-VI compounds in the last decades has been centered on the optoelectronic properties of indium and gallium chalcogenides. These outstanding properties are leading to novel advancements in terms of fundamental and applied science. One of the advantages of these compounds is to present laminated structures, which can be exfoliated down to monolayers. Despite the large knowledge gathered toward indium and gallium chalcogenides, the family of the group III-VI compounds embraces several other noncommon compounds formed by the other group III elements. These compounds present various crystal lattices...

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“…The structure of Tl 2 Te 3 was examined to decide the precise distances between atoms. 11 An examination of galvanometric phenomena, thermoelectric and electrical conductivity was made on Tl 2 Te 3 at a temperature range (77-500) K. 8 In addition, the theoretical electronic structure was investigated for Tl 5 Te 3 , TlTe, and Tl 2 Te 3 . 4 The structure of Tl 2 Te 3 was investigated and showed that the compound crystallized in the centrosymmetric monoclinic space group C2/c of lattice constant a = 13.28 Å, b = 6.56 Å, c = 7.92 Å, and β = 107.14°.…”

mentioning

confidence: 99%

“…4 The structure of Tl 2 Te 3 was investigated and showed that the compound crystallized in the centrosymmetric monoclinic space group C2/c of lattice constant a = 13.28 Å, b = 6.56 Å, c = 7.92 Å, and β = 107.14°. 11 Hussein. S.A et al investigated the electrical properties of single-crystal Tl 2 Te 3 in a temperature range from 160-350 K. The results revealed that Tl 2 Te 3 is a p-type semiconductor with an energy gap of 0.7 eV and an acceptor level depth of about 0.45 eV.…”

mentioning

confidence: 99%

Study of Structural and Optical Properties of Tl₂Te₃ Thermally Evaporation Thin Films

Salwa

2022

ECS J. Solid State Sci. Technol.

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Tl2Te3 semiconductor thin films different thicknesses were prepared using the thermal evaporation technique at room temperature under a vacuum of 10-5Pa. X-ray Diffraction (XRD) proved the polycrystalline nature of all films. The crystallite size was calculated, and their values varied from 18.21 to 12.6 nm for different thicknesses. The optical properties of the Tl2Te3 thin films were measured in the wavelength range 300-1200 nm. The results reveal that the films had a direct energy gap. The direct energy gap varies from 1.01 to 0.8 eV with film thicknesses. Other linear and nonlinear optical constants such as the refractive index (n), absorption index (K), dielectric constant (ε), and dielectric relaxation time, were determined

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The Crystal Structure of Tl2Te3 - a Reinvestigation

Cited by 21 publications

References 4 publications

Solid State Polyselenides and Polytellurides: A Large Variety of Se–Se and Te–Te Interactions

Solid State Polyselenides and Polytellurides: A Large Variety of Se–Se and Te–Te Interactions

A New, Thorough Look on Unusual and Neglected Group III‐VI Compounds Toward Novel Perusals

Study of Structural and Optical Properties of Tl₂Te₃ Thermally Evaporation Thin Films

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The Crystal Structure of Tl2Te3 - a Reinvestigation

Cited by 21 publications

References 4 publications

Solid State Polyselenides and Polytellurides: A Large Variety of Se–Se and Te–Te Interactions

Solid State Polyselenides and Polytellurides: A Large Variety of Se–Se and Te–Te Interactions

A New, Thorough Look on Unusual and Neglected Group III‐VI Compounds Toward Novel Perusals

Study of Structural and Optical Properties of Tl2Te3 Thermally Evaporation Thin Films

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Study of Structural and Optical Properties of Tl₂Te₃ Thermally Evaporation Thin Films